The protein craze hasn’t ended, and for good reason. Protein, one of the three macronutrients essential for good health, is found in every structure in the body, including hair, nails, skin, organs, bones, and muscles. ( 1 ) Its benefits, including muscle building, appetite control, metabolism-revving, and bone strengthening, make it a crucial element in maintaining a healthy lifestyle when combined with a balanced diet and regular exercise. ( 2 )
With dizzying protein supplement options on the market today, choosing the best protein powder feels overwhelming. That’s why we’ve tested over 100 of the best protein powders available and compiled 11 of our favorite options to help you narrow down your top contenders. As a registered dietitian nutritionist (RDN), I’ll assess the ingredients and nutrient content to give you a clear understanding of what each product brings to the table.
Best protein powder overall
Transparent Labs Whey Protein Isolate packs 28 grams of highly effective whey protein isolate into a powder that both tastes great and blends well. Sweetened with stevia, this protein powder is a good low-carb and low-fat option. This top formula is also Informed Choice and Informed Protein certified, meaning it’s independently verified to contain the amount of protein advertised and no banned substances.
Medical disclaimer: This article is intended for educational and informational purposes only. It is not intended as a substitute for medical advice. For health advice, contact a licensed healthcare provider.
Our picks for the best protein powders of 2024
- Best overall: Transparent Labs Whey Protein Isolate
- Best gluten-free: Sports Research Whey Protein Isolate
- Best-tasting: Legion Whey+
- Best natural: Gainful Protein Powder
- Best pea: Nutricost Organic Pea Protein
- Best value: Jacked Factory Authentic Iso
- Best for older adults: Ritual Daily Shake 50+
- Best for muscle gain: Promix Recovery Protein
- Best vegan: Gnarly Vegan
- Best for smoothies: Optimum Nutrition 100% Gold Standard Whey
- Best collagen: Momentous Collagen Peptides
- Best for athletes: Kaged Protein Isolate Elite
- Best for women: Thorne Whey Protein Isolate
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| Transparent Labs Whey Protein Isolate | Sports Research Whey Protein Isolate | Legion Whey+ | Gainful Protein Powder | Nutricost Organic Pea Protein | Jacked Factory Authentic Iso | Ritual Daily Shake 50+ | Promix Recovery Protein | Gnarly Vegan | Optimum Nutrition 100% Gold Standard Whey | Momentous Collagen Peptides | Kaged Protein Isolate Elite | Thorne Whey Protein Isolate | |
| Rating | |||||||||||||
| Servings | 30 | 25 | 30 | 14 | 38 | 30 | 15 | 26 | 16 | 28 | 30 | 24 | 30 |
| Cost Per Serving | $2.00 | $1.19 | $2.00 | $3.21 | $0.66 | $1.33 | $2.67 | $2.65 | $3.87 | $1.61 | $1.73 | $2.08 | $1.83 |
| Protein Source | Whey Protein Isolate | Whey Protein Isolate | Whey Protein Isolate | Customizable (Whey Protein Isolate or Pea Protein, Brown Rice Protein) | Pea Protein Isolate | Whey Protein Isolate | Organic Pea Protein | Whey Protein Isolate | Pea Protein Isolate, Chia Seed Protein, Cranberry Seed Protein | Whey Protein Isolate, Whey Protein Concentrate, Hydrolyzed Whey Protein | Collagen Peptides | Whey Protein Isolate, Casein Isolate, Milk Protein Isolate | Whey Protein Isolate |
| Flavor Options | 15 | 3 | 18 | 8 | 1 | 9 | 1 | 1 | 2 | 20+ | 1 | 3 | 2 |
| Third-Party Tested | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes |
Best overall protein powder: Transparent Labs Whey Protein Isolate
Key product features
What you should know
Transparent Labs Whey Protein Isolate excels with its high protein content and clean, natural ingredients list, offering a gluten-free option that maximizes muscle protein synthesis without unnecessary additives.
- The peppermint hot chocolate flavor drew rave reviews from our product tester, who likened it to real peppermint hot chocolate without the typical sugar-laden toppings.
- While expensive at $2 per serving, this product delivers solid value due to its high protein content and high-quality ingredients.
- Transparent Labs Whey Protein Isolate is a well-rounded protein powder that delivers a high-quality 28 grams of protein per serving.
Why we like Transparent Labs Whey Protein Isolate as best overall
Transparent Labs Whey Protein Isolate is packed with 28 grams of protein per serving. This is an effective dose of protein for those wanting to build muscle, as 20-40 grams every three to four hours is ideal for stimulating muscle protein synthesis. ( 3 )
Transparent Labs has built a reputation for formulating high-quality, effective products with a focus on using clean, natural ingredients. This is evident in this gluten-free protein powder supplement, which includes only whey protein powder, cocoa, natural flavors, sodium chloride (table salt), and stevia—nothing more.
Depending on flavor, Transparent Labs Whey Protein Isolate provides just zero to three grams of carbohydrates, zero to one gram of added sugar, and zero to two grams of fat. This ensures that you receive the essential protein necessary for building lean mass without excess carbs or fats.
The remaining ingredients, like salt, stevia, and cocoa, contribute to the product’s flavor. Considering the minimal ingredients, lack of fillers, and ideal macronutrient breakdown, we rated the formulation a five out of five.
Transparent Labs Whey Protein Isolate is available in 15 flavor options. The variety is a lot for a protein powder, though we’ve tried other brands that offer even more flavors. Still, you’ll never get bored drinking the same old protein shake day in and day out. Our product tester tried the peppermint hot chocolate flavor and rated the taste 5 out of 5 stars. He thought it tasted like real peppermint hot chocolate without the marshmallow and whipped cream toppings.
Not only was taste a win, but the product’s solubility was also on par, earning it 5 out of 5 stars. Our tester didn’t experience any trouble mixing the powder. There wasn’t clumping or stubborn powder stuck to the bottom of the shaker bottle.
The $2 price per serving is right on the median price point for the protein powders featured here, but higher than some competitors, so we rated it 3.5 out of 5 stars. Some customers may find the whey protein isolate, formulation, and taste worth spending a little more.
What customers are saying
Customers routinely leave positive feedback on Amazon about the clean ingredient profile and excellent taste.
“Love how pure, and short, the ingredient list is. Taste is mild but good. A lot of whey proteins I’ve used cause bloating and this hasn’t at all, love that!”
Kyle W., Verified Amazon Buyer
On the other hand, an Amazon customer with the username “Crowman” called out the chocolate peanut butter flavor in a critical review.
“I mostly buy Optimum Nutrition protein, but bought this on a promotion. Item mixes terribly with cold water and has an overly sweet chocolate flavor. When mixed with warm-hot water you can get almost hot cocoa flavor, which is very pleasant, but I know most people don’t prefer a hot protein shake. Overall for the price point I don’t think this is a buy unless it’s on sale,” they wrote.
What our safety lab analysis showed
Our third-party lab analysis showed Transparent Labs Whey Protein Isolate did not contain unsafe levels of heavy metals, bisphenols, phthalates, or pesticides.
Specs
| Protein type | Whey Protein Isolate |
| Flavors | Milk Chocolate, French Vanilla, Chocolate Peanut Butter, Vanilla Peanut Butter, Dark Chocolate, Oatmeal Chocolate Chip Cookie, Unflavored, Strawberry Milkshake, Mocha, Cinnamon French Toast, Sugar Cookie, Vanilla Oatmeal Cookie, Blueberry Pancakes, Peanut Butter, Mint Chocolate Chip |
| Certifications | Informed Choice, Informed Protein |
| Number of servings | 30 |
| Serving size | 1 scoop (32.96 grams) |
| Nutrition stats per serving | (Milk Chocolate) Calories: 120, Total carbs: 1g, Added sugar: 0g, Fat: 0g, Protein: 28g |
Best gluten-free protein powder: Sports Research Whey Protein Isolate
Key product features
What you should know
Sports Research Whey Protein Isolate offers 25 grams of protein in each serving, making it a great product for people who want to gain lean muscle and support workout recovery.
- Our tester rated this formulation 4 out of 5 stars; it’s important to note that it’s sweetened with stevia, a sugar substitute.
- At $1.19 per serving, this protein powder falls in the middle of the road compared to other options on the market.
- This is a great choice for people who are watching their calorie intake—each serving is 150 calories.
Why we like Sports Research Whey Protein Isolate as best gluten-free
Sports Research Whey Protein Isolate offers 25 grams of whey isolate per serving. You can choose between vanilla and chocolate flavors; each is sweetened with stevia. While you can simply mix the protein powder with water or milk in a shaker bottle, our team also recommends using it to make nutritious smoothies. All you need is a scoop of powder, your favorite fruit, and some water or milk in a blender.
Sports Research gives you three flavor options for their Whey Protein Isolate: vanilla, chocolate, and Dutch chocolate. All three mix well with water, but will leave a layer of foam at the top of the shaker bottle. Our tester tried the creamy vanilla flavor and preferred the texture and flavor when mixing the protein powder with milk instead of water.
We also love the high-quality ingredients like 25 grams of whey protein, 6.9 grams of BCAAs, and 1,000 mg of leucine in this powder that make the supplement specifically formulated to boost lean muscle growth and aid in workout recovery. An 8-week study of men engaged in resistance training showed that the athletes taking whey protein supplementation had gains in muscular strength and endurance during workouts. ( 4 )
Whey protein isolate is well-researched. It’s been proven to help decrease soreness after exercise thanks to its amino acids. ( 3 ) With 25 grams of protein per serving, each serving of Sports Research Whey Protein Isolate can help people activate their muscles during the workout and repair exercise-induced damage by promoting healing through muscle protein synthesis, which is the process of creating new muscle protein . ( 3 )
Our tester liked that Sports Research Whey Protein Isolate didn’t cause their stomach to hurt or any bloating—common side effects of protein powder.
We also appreciate how Sports Research Whey Protein Isolate is non-GMO certified, which means the ingredients are not genetically engineered or modified.
Sports Research gives you two size choices when you go to purchase the protein powder. The 32.96 ounce bag costs $37.95 before any discounts. The company also offers an 80 ounce bag for $68.85, but they have a current 15% discount.
What customers are saying
Approximately 1,100 reviewers on Amazon have reviewed the Sports Research Whey Protein Isolate, with many of them raving about flavor and texture.
“This tastes great. Not grainy tasting like other protein powders I’ve tried,” wrote an Amazon customer named Cindy C.
Another Amazon customer says this supplement is a “game changer” after her doctor recommended she start an exercise program.
“I finally lost a couple of pounds this week, my body seems to be building muscle now, my heart rate variability has steadily increased above my usual zone, and the milkshake I make is absolutely delicious. I look forward to drinking it.”
Lily, Amazon
But not all customers are fans and some had digestive issues. One customer, Christine S., experienced stomach cramps after the first and subsequent times she tried it. Customer service was helpful and she was pleased that Sports Research gave her a refund and she might try it again with a different flavor.
Another tester, Ben, gave a three-star review.
“The value per serving was a selling point and seeing other reviews about being great tasting and mixing well,” he writes. “But I don’t agree with it tasting great. It’s not horrible, but definitely not good tasting either. I won’t be buying again.”
Specs
| Protein type | Whey |
| Flavors | Creamy Vanilla, Chocolate, Dutch Chocolate |
| Certifications | Informed Choice |
| Number of servings | 25 |
| Serving size | 1 scoop (36 grams) |
| Nutrition stats per serving | Calories: 150, Total carbs: 2g, Added sugar: Less than 1g, Fat: 3.5g, Protein: 25g |
Best-tasting protein powder: Legion Whey+
Key product features
What you should know
Legion Whey+ sets itself apart with its commitment to natural ingredients and a wide array of unique, delightful flavors, avoiding artificial sweeteners, flavors, or dyes, and focusing on high-quality whey protein isolate to support muscle growth with minimal calorie intake.
- Our product tester reported that the cinnamon cereal flavor compared favorably to the well-known Cinnamon Toast Crunch cereal, leading to a taste score of 4.5 out of 5 stars.
- At $2 per serving, this whey protein powder is right on the median price point and slightly more than the average cost of $2.21 per serving for the protein powders featured here.
- With only 100 calories per serving, Legion Whey+ is an ideal solution if you’re looking for ways to boost your protein intake without eating into your caloric budget.
- One serving of Legion Whey+ includes 5.6 grams of BCAAs for muscle growth.
Why we like Legion Whey+ as best-tasting
Legion Whey+ is known for its natural ingredients, astounding flavor options, and superb taste.
Made without artificial sweeteners, flavors, or food dyes, Legion Whey+ caters to individuals seeking a flavorful protein powder without unnecessary additives.
With just 100-130 calories per one-scoop serving, it may appeal to athletes aiming to build muscle while maintaining a lean physique. Almost all of those calories come exclusively from the 22 grams of whey protein isolate, a fast-absorbing, highly bioavailable form of protein. ( 4 ) Upon consumption, amino acids from whey protein isolate rapidly become available for muscle building and repair.
Legion Whey+ contains only three grams of carbohydrates, mostly from highly processed maltodextrin. Maltodextrin offers a quick source of energy, but has a higher glycemic index than table sugar and may increase blood sugar. ( 5 ) Fortunately, Legion Whey+ only contains one gram of maltodextrin per serving, which isn’t enough to raise any concerns.
Additional ingredients include cocoa powder with alkali, xanthan gum, natural flavors, sunflower lecithin, salt, stevia leaf extract, and Ovasweet (stevia extract and dextrin). Cocoa powder, natural flavors, salt, stevia, and Ovasweet are natural ingredients that contribute to the product’s taste. The xanthan gum and sunflower lecithin are emulsifiers that improve the protein powder’s ability to mix well with liquids. We love the natural ingredients in this product and rate the formulation 5 out of 5 stars.
Legion Whey+ comes in 16 flavors, including Banana Bread, Honey Cereal, and Apple Pie, all sweetened with stevia. Our Fortune product tester, who tried the Cinnamon Cereal flavor, rated the taste 4.5 out of 5 stars. He compared the taste to the iconic Cinnamon Toast Crunch cereal, but said it wasn’t quite as pungent.
Furthermore, our testing expert found Legion Whey+ to mix well, rating solubility 5 out of 5 stars. He didn’t experience clumping, grittiness, or pesky floaties after shaking.
What customers are saying
Customers on Amazon enjoy the taste and consistency, especially when compared to their previous experiences with protein powders.
“My personal take on Legion Athletics Whey+ protein powder (in any flavor) is stellar for several reasons. It mixes so well that I have yet to get a glob or chunk of dusty powder in any well mixed serving. It helps me reach my protein macro goals much easier (and cheaper I might add)… And now, the caveat of it all, it tastes really good. ”
Gadget-Stan, verified Amazon buyer
An Amazon customer named Aaron Shapiro also spoke highly of Legion Whey+ from a flavor perspective.
“Anybody who uses protein powder supplements knows, they either taste like chalk, chemicals or mix poorly and you have to deal with chunks in your drink. Legion brand protein powder tastes like the actual flavor on the bag and mixes perfectly. I even use this protein powder for my nightly chocolate shake.”
Unfortunately, an Amazon reviewer named Nancy Cruz did not have a positive experience with her purchase.
“I got the strawberry banana flavor and the very sweet after taste just lingers in your mouth. I wouldn’t purchase again. I’ll probably order a plain unsweetened protein to mix it with so I don’t waste it because it’s not a cheap protein.”
What our safety lab analysis showed
Our third-party lab analysis showed Legion Whey+ did not contain unsafe levels of heavy metals, bisphenols, phthalates, or pesticides.
Specs
| Protein type | Whey protein isolate |
| Flavors | Chocolate Peanut Butter, Dutch Chocolate, French Vanilla, Unflavored, Chocolate Hazelnut, Cookies & Cream, Mocha Cappuccino, Strawberry Banana, Mint Chocolate, Banana Bread, Birthday Cake, Salted Caramel, Cinnamon Cereal, Pumpkin Pie, Apple Pie, Cocoa Cereal, Fruity Cereal, Honey Cereal |
| Certifications | Labdoor tested for purity, Non-GMO Project verified |
| Number of servings | 30 |
| Serving size | 1 scoop (29 grams) |
| Nutrition stats per serving | Calories: 100, Total carbs: 3g, Added sugar: 0g, Fat: 0g, Protein: 22g |
Best natural protein powder: Gainful Protein Powder
Key product features
What you should know
Gainful Protein Powder differentiates itself with its highly praised clean, natural formulation and innovative customization options, allowing users to tailor their protein blend to specific dietary needs and goals, from weight management to muscle building.
- You have ample flexibility to select the formula that fits your dietary needs and goals using the company’s customization feature.
- Gainful Protein Powder does not rank highly from a value perspective due to the high cost per serving ($3.21) and the fact one bag contains just 14 servings.
- Despite its high price tag, this protein powder works well for people who want more control over what goes into their bodies, as you can choose from plant-based, keto-friendly, or low-lactose options.
- Although Gainful Protein Powder comes unflavored, you can select from eight “flavor boost” packets to give it a specific taste.
Why we like Gainful Protein Powder as best natural
Crafted by experts, Gainful Protein Powder is made with clean, natural ingredients for maximum effectiveness. It contains no artificial sweeteners, flavors, or dyes. Therefore, we rated formulation 5 out of 5 stars.
Gainful Protein Powder stands out from other protein supplements for its unique customization feature. You can choose from whey, plant-based, keto, or low-lactose protein options to suit your specific dietary needs. Then, you can choose your personal goal, whether it be protein powder for weight loss , weight gain, or muscle building, for the protein powder option best suited for you.
Depending on your unique customizations, each serving contains between 19 and 26 grams of protein. Whether you choose the whey protein or plant-based protein blend, you’re getting the complete essential amino acid profile, optimal for retaining and building lean mass. ( 6 ) In other words, both offer the nine amino acids our bodies don’t make on their own and must be consumed through foods.
Additional ingredients include green tea extract, sunflower lecithin, gluten-free oat powder, and tapioca maltodextrin. Green tea extract contains catechins and caffeine, which can support efforts to lose weight and reduce waist circumference, which is why you’ll find this ingredient in the Gainful Protein Powder designed for those wanting to shed pounds. ( 7 )
Unlike most protein powders that come pre-flavored, Gainful is unflavored but can be flavored by adding a “flavor boost” packet. There are eight flavors to choose from, or you can order a variety pack to test each one. Depending on the flavor boost, each packet adds five to 10 calories and one to two grams of carbs to your scoop of protein.
Our expert tester tried the Madagascar vanilla, rich chocolate, and sea salt caramel options, and rated the taste 5 out of 5 stars. She not only found the flavors delicious but also appreciated the ability to regulate how much flavor she added to her protein powder to ensure it wasn’t overpowering.
Gainful Protein Powder lost some points for solubility, as our tester noticed obvious clumping when mixed in a shaker bottle. Ultimately, she rated solubility 3.5 out of 5 stars but enjoyed the flavor enough to tolerate the clumps.
When you purchase Gainful Protein Powder, you are automatically signed up to receive an order every four weeks. Unless you order two bags, you’ll run out of the product before your next order is shipped if you consume it daily. This product is on the pricier side, costing $3.21 per serving, and we rated the cost 1 out of 5 stars.
What customers are saying
On Target’s website, customers appreciate that Gainful Protein Powder doesn’t have a chalky taste that you find with lower-quality protein powders. In addition, they enjoy being able to try different flavors using the boost packets.
“Great protein that appears to be quite clean without many ingredients. The vanilla mix in is my favorite and I have experimented with mixing in my own items given their container is unflavored to start. This brand gives you plenty of options!” wrote a verified Target buyer with the username “abaseballnutjr.”
“I drink this without any flavor boosts mixed with milk and taste isn’t bad at all! Mixes well and I love how simple the ingredients are. No weird additives that upset my sensitive digestive system or lactose from whey protein to cause bloating! This protein powder is perfect if you find the Vega/Orgain powders too sweet”
Happyshopper23, verified Target buyer
However, another verified Target buyer with the username “a” was not nearly as impressed by Gainful.
“As much as I enjoy the cleaner ingredients compared to other protein powders, the taste is by far awful. I purchased this with the Madagascar Vanilla booster and it did not taste like vanilla protein powder at all. Also, really expensive for the amount of product you get.”
Specs
| Protein type | Whey Protein Isolate or Pea Protein + Brown Rice Protein |
| Flavors | Sea Salt Caramel, Rich Chocolate, Cinnamon Toast, Cookies & Cream, Caffe Mocha, Chocolate Peanut Butter, Strawberry Cream, Madagascar Vanilla |
| Certifications | K.A. |
| Number of servings | 14 |
| Serving size | 1 scoop (30 grams) |
| Nutrition stats per serving | (Whey for Building Muscle) Calories: 110, Total carbs: 1g, Added sugar: 0g, Fat: 1.5g, Protein: 24g (flavor boost not included) |
Best pea protein powder: Nutricost Organic Pea Protein
Key product features
What you should know
Nutricost Organic Pea Protein contains 20 grams of protein and 30% of the daily value for iron, making it a great option for a plant-based protein powder.
- Nutricost Organic Pea Protein is a good option for those with an allergy or intolerance to dairy, soy, or egg, or for those following a vegan diet.
- This protein powder is very affordable compared to others on the market at only $0.47 to $0.65 per serving, depending on the size of the container.
- This product only comes in an unflavored option, but it will easily blend in with whichever beverage you’d like.
Why we like Nutricost Organic Pea Protein as best pea
Nutricost Organic Pea Protein is our pick for the best pea protein powder, providing 20 grams of high-quality protein for the low cost of $0.47 to $0.65 per serving, depending on which size container you purchase. This formula contains only one ingredient, organic pea protein isolate, which means it’s unflavored and free of additives.
Nutricost Organic Pea Protein is notably iron-rich, containing 30% of the daily value per serving. This is beneficial for those following a vegetarian or vegan diet, since studies have shown that those diets come with a higher risk of iron deficiency or insufficiency. ( 8 ) This formula also provides 6% of the daily value for calcium per serving.
But this protein powder may not be suitable for those following a low-sodium diet since it provides 10% of the daily value for sodium (or 220 milligrams) in one serving, which is higher than most other protein powders.
Nutricost’s formula uses pea protein isolate, which is typically sourced from yellow split peas. Pea protein isolate is higher quality than pea protein concentrate—also commonly used in protein powders—thanks to its lower carbohydrate and fat content and higher protein content (by weight). ( 9 ) Pea protein isolate is also more easily digestible than most other plant-based proteins, which means it’s more nutritious. ( 10 )
Pea protein is technically a complete form of protein, containing all nine essential amino acids (EAAs), though it’s very low in the EAA called methionine. EAAs are absolutely vital for synthesizing protein in the body, and must be consumed via food since the body can’t produce them. ( 11 ) Methionine specifically helps with digestion function and reducing DNA damage, among other benefits. ( 12 ) Pea protein is also high in branched-chain amino acids ( BCAAs ), which help maintain and grow muscles. ( 13 )
Nutricost Organic Pea Protein is made in a GMP-compliant facility, a standard regulated by the FDA, which helps to ensure you’re getting a pure product.
See more options for the
best pea protein powders
.
What customers are saying
Nutricost Organic Pea Protein has over 700 reviews on Amazon. Most customers like the quality of the product and how affordable it is.
“This is a steal of a deal. I just grabbed another one before it goes away. If you are used to drinking green powders with water, this tastes just fine. I simply add a scoop of this to two different green powders I drink and together, they all work. Plus this adds creaminess. Definitely recommend.”
C. Romano, Verified Amazon Buyer
“As far as pure pea protein, this is the best bang-for-your-buck,” wrote verified Amazon customer Nolan.
Reviews were mixed on the product’s taste and texture, and many customers recommend adding the protein powder to something else that’s flavored.
“This is unflavored, but that doesn’t mean it has no flavor. It tastes like peas. If you load up on fruits in a smoothie you won’t really taste it, but that means you’re introducing more sugar back into your drink. This will bother some people more than others, so it may not matter to you,” wrote Robert R.
Specs
| Protein type | Pea protein isolate |
| Flavors | Unflavored |
| Certifications | Certified organic |
| Number of servings | 38 |
| Serving size | 1 scoop (24 grams) |
| Nutrition stats per serving | Calories: 90, Total carbs: 1g, Added sugar: 0g, Fat: 1.5g, Protein: 20g |
Best value protein powder: Jacked Factory Authentic Iso
Key product features
What you should know
Jacked Factory Authentic Iso emerges as a cost-effective protein powder choice, offering a high-quality whey protein isolate at a significantly lower price per serving compared to the market average, designed to suport muscle growth, recovery, and strength enhancement.
- Nearly all of the caloric content comes from protein, as one serving only contains one gram of carbs and 0.5 grams of fat.
- At $1.33 per serving, Jacked Factory Authentic Iso falls well below the average protein powder price.
- This non-third-party-tested protein powder is a great choice if you’re looking to up your protein intake with a limited budget for supplements.
- Unlike some of the other protein powders on this list, Jacked Factory Authentic Iso contains artificial ingredients, including sucralose.
Why we liked Jacked Factory Authentic Iso as best value
Jacked Factory Authentic Iso is a budget-friendly protein powder formulated to support muscle building, aid in recovery, and increase strength. At only $1.33 per serving, it’s much more affordable than the average price of $2.21 per serving for the protein powders recommended here.
Each serving boasts 25 grams of whey protein isolate, which is rapidly absorbed and easily digested, making it ideal for muscle repair and recovery after an intense lifting session. ( 14 ) Because whey protein isolate is more filtered, most of the lactose and carbs have been removed, and some with lactose intolerance can easily digest and tolerate it.
With only half a gram of fat and one gram of carbs, Jacked Factory Authentic Iso is all about protein. Of its 110 calories, 100 come solely from protein, making it appealing for those who already consume plenty of carbs and fat through the foods they eat.
Stevia, sucralose, and natural and artificial flavors contribute to the product’s customer-praised taste. While we appreciate the high protein content and minimal formulation, the inclusion of artificial ingredients is a slight drawback, so we rated the formulation 4.5 out of 5 stars.
Some may encounter gas, bloating, and diarrhea following the consumption of sucralose, an artificial sweetener, but the majority tolerate it without issues. Its safety has undergone thorough research and evaluation by regulatory agencies, resulting in approval for use in foods and beverages as a non-caloric sweetener. ( 15 )
With nine flavor options, your taste buds won’t get bored quickly. The absence of third-party testing for Authentic Iso likely contributes to its affordable price but is disappointing for consumers who prioritize brand transparency and seek assurance that the product’s contents align precisely with what is stated on the label.
What customers are saying
Customers on Amazon appreciate multiple aspects of this supplement, including how easily it mixes, how delicious it tastes, and how well it’s priced.
“I like that their proteins are clean with no added junk. They have a nice variety of flavors too. The protein is good on shakes, overnight oats and I’ve used it for baking. Super delicious.”
JLW, verified Amazon customer
While most customers have been satisfied with the taste, an Amazon reviewer named Maria Sanchez expressed disappointment.
“I don’t know how I feel about this powder. It is really good…for the first few bites/sips. About halfway through you realize there is a bit of that sweetener taste. Currently using it stirred into my oatmeal. Tried it mixed with some unsweetened vanilla feeding tube formula, and it was a little too sweet to just drink through a straw.”
Specs
| Protein type | Whey Protein Isolate |
| Flavors | Milk Chocolate, Cookies & Cream, Blueberry Muffin, Cinnamon French Toast, Unflavored, Chocolate Peanut Butter, Vanilla Oatmeal Cookie, Vanilla, Peanut Butter |
| Certifications | K.A. |
| Number of servings | 30 |
| Serving size | 1 scoop (30 grams) |
| Nutrition stats per serving | (Vanilla) Calories: 110, Total carbs: 1g, Added sugar: 0g, Fat: 0.5g, Protein: 25g |
Best protein powder for older adults: Ritual Daily Shake 50+
Key product features
What you should know
Ritual Daily Shake 50+ is designed to support muscle maintenance in older adults, with a formula enriched with 20 grams of pea protein and essential nutrients like calcium HMB to counteract the natural decline of muscle mass with age.
- Despite delivering a disappointing taste experience, Ritual Daily Shake 50+ earned a perfect solubility score from our product tester.
- At $2.67 per serving and with only 15 servings per package, this plant-based protein powder does not provide great bang for your buck compared to other options.
- With added amino acids, fiber, and other nutrients, Ritual Daily Shake 50+ is formulated to support older adults with their digestion and overall health.
Why we like Ritual Daily Shake 50+ as best for older adults
Ritual Daily Shake 50+ is a plant-based protein supplement with added amino acids and nutrients intended to support muscle maintenance for older adults. Muscle mass decreases approximately three to eight percent each decade after 30 years of age, and this rate increases after 60. ( 16 ) Implementing a daily protein supplement may help you reach increased protein needs and retain muscle mass.
Each serving of Ritual Daily Shake 50+ includes 20 grams of pea protein, which is fortified with methionine to create a more complete essential amino acid profile. While pea protein contains all nine essential amino acids, it is relatively low in methionine. Ritual has added methionine to the formula to enhance its muscle-preserving potential.
In addition to its protein content, Ritual Daily Shake 50+ provides two grams of fat and three grams of fiber. Fiber is important for older adults because it may help relieve constipation and manage inflammation, which are common issues associated with aging. ( 17 )
Aside from pea protein, the shake provides calcium HMB, a metabolite of the branched-chain amino acid leucine. This compound potentially enhances muscle protein synthesis, contributing to muscle maintenance and growth. ( 18 ) Considering the product’s amount of protein and natural ingredients, we rated the formulation 5 out of 5 stars.
Ritual Daily Shake 50+ is only offered in one flavor—vanilla. It’s sweetened with monk fruit and fermented sugarcane to enhance the taste. Even so, our product tester didn’t love the flavor, rating it 3 out of 5 stars. Determined to mask the flavor, she tried it with water, juice, coffee, and chocolate milk. She noticed an off-putting aftertaste that remained regardless of the liquid mixed with it.
Although our tester didn’t love the taste, she thought solubility was on point. She noticed the powder mixed easily without clumps or floaties and rated the solubility 5 out of 5 stars.
Ritual Essential Protein is third-party tested by Informed Sport. The product has been rigorously tested for over 250 banned substances, including stimulants, narcotics, and diuretics. It could be a suitable option for those wanting to
feel stronger and enhance longevity.
What customers are saying
Reviewers on Amazon provide positive feedback about the clean ingredients found in this plant-based formulation.
“I have been using this protein powder for years and I love it so much! It tastes great and doesn’t have that chalky taste that a lot of protein powders have. As a vegan, I love that this is a complete protein so I don’t have to worry about getting in all the essential amino acids. This allows me to not have to think as hard about what I’m eating. Love this and highly recommend to everyone!” wrote a verified Amazon buyer named Sam.
“It’s pricer in comparison to some other protein powders yet, I think it’s still worth it given the quality and taste. It’s definitely my favorite protein powder on the market..”
KC MCG, verified Amazon buyer
However, an Amazon customer named Nancy G. found a few flaws with Daily 50+.
“Hopeful for a clean protein powder but so dissatisfied. No vanilla flavor to speak of. Within 2 minutes of mixing was so thick I could barely drink it. And the topper is that is non refundable.”
Specs
| Protein type | Pea Protein |
| Flavors | Vanilla |
| Certifications | Informed Sport, Informed Protein |
| Number of servings | 15 |
| Serving size | 2 scoops (32 grams) |
| Nutrition stats per serving | Calories: 120, Total carbs: 3g, Added sugar: 0g, Fat: 2g, Protein: 20g |
Best protein powder for muscle gain: Promix Recovery Protein
Key product features
What you should know
Promix Recovery Protein contains 30 grams of protein and provides 360 calories per serving, far more than the other options in this list, making it a great protein powder for those looking to optimize muscle growth.
- Promix Recovery Protein uses whey protein isolate, which is a very effective and easily digestible form of protein—though it’s not suitable for those following a vegan diet or those who have a dairy allergy or intolerance.
- This protein powder is more expensive than average at $3.00 per serving, but you get a lot of bang for your buck with 30 grams of protein per serving, plus glutamine to aid muscle recovery. ( 19 )
- This formula is also high in carbohydrates, providing 60 grams per serving, most of which is sourced from organic cassava.
Why we like Promix Recovery Protein as best for muscle gain
Promix Recovery Protein is our pick for the best protein powder for muscle gain thanks to its high-carb and high-protein content. This formula comes in at a whopping 360 calories per serving, with much of it coming from the 60 grams of carbohydrates sourced from organic cassava, a type of starchy root vegetable.
Carbohydrates play an important role in post-workout recovery and are needed to replenish the body’s glycogen stores, which muscles rely on as a quick source of energy. ( 20 ) Some research has also shown that consuming protein along with carbohydrates after exercise can lead to even better recovery and improved glycogen synthesis. ( 21 )
This formula is particularly high in carbohydrates, and calories in general, which may make it more suitable for those who are looking to gain weight, weightlifters going through a “bulk” phase, or athletes with high performance demands.
Promix’s Recovery Protein contains 30 grams of protein per serving from whey protein isolate. One study found that post-exercise consumption of whey protein in particular enhances growth throughout the body and may also improve recovery. ( 22 ) Overall, there are 6.8 grams of branched-chain amino acids (BCAAs), which help maintain and grow muscles. ( 13 ) It also contains glutamine, an amino acid which may help reduce the effect of muscle damage from exercise. ( 19 )
This formula is naturally flavored with organic, fair trade cocoa and is sweetened with organic cassava dextrose and organic cassava maltodextrin.
It’s important to note that maltodextrin has a high glycemic index, even more so than table sugar, which may cause your blood sugar to spike after consumption. ( 5 ) So this protein powder may not be suitable for some, especially those with diabetes.
This recovery protein powder is made in a GMP-certified facility, but Promix also lists the results of third-party testing on its website for this product, to highlight that it’s free of certain unsafe or banned substances.
Check out our other top choices for the
best protein powders for muscle gain
if you’re still looking.
Specs
| Protein type | Whey protein isolate |
| Flavors | Dutch chocolate |
| Certifications | GMP certified |
| Number of servings | 23 |
| Serving size | 4 scoops (100 grams) |
| Nutrition stats per serving | Calories: 360, Total carbs: 60g, Added sugar: 36g, Fat: 1.5g, Protein: 30g |
Best vegan protein powder: Gnarly Vegan
Key product features
What you should know
Gnarly Vegan distinguishes itself in the vegan protein market with a well-rounded formula that not only delivers 20 grams of plant-based protein from sources like pea, chia seed, and cranberry seed to support muscle growth but also includes added benefits like fiber, probiotics, digestive enzymes, and healthy fats for overall health.
- Because it has well-balanced macros and 200 calories per serving, you can use Gnarly Vegan as a meal replacement when you’re on the go or don’t have time to prepare food.
- Priced at $3.87 per serving, this vegan supplement costs nearly double the amount of the average protein powder.
- Besides being vegan-friendly, this protein powder is well-suited for people who want to support optimal gut health with probiotics, fiber, and digestive enzymes.
Why we like Gnarly Vegan as best vegan protein powder
Gnarly Vegan is made from a combination of plant-based protein sources, including pea protein isolate, chia seed protein, and cranberry seed protein. By combining these proteins, Gnarly Vegan contains all nine essential amino acids necessary for muscle repair and growth. Each serving contains 20 grams of protein, enough to activate muscle protein synthesis.
This vegan protein powder stands apart from the rest because there’s a lot more to it than just protein, including fiber, probiotics, digestive enzymes, and healthy fats. It’s cholesterol-free, easy to digest, and hypoallergenic. For these reasons, we rated formulation 5 out of 5 stars.
Every two scoops provide 16 grams of carbohydrates, nine of which are from fiber, an indigestible carbohydrate that may promote regular bowel movements, reduce blood cholesterol, and help manage blood sugar. ( 23 ) Sixteen grams may sound like a lot, but most are from fiber, leaving you with only seven grams of net carbs. Net carbs are starches and sugars that may directly impact blood sugar. ( 24 )
What’s more, the product includes digestive enzymes and probiotics, which may improve gut health and digestion. ( 25 ) Enzymes break down nutrients so they can be absorbed and utilized by the body. Probiotics are good bacteria in the gut that may reduce symptoms of irritable bowel syndrome. ( 26 )
Since Gnarly Vegan contains higher calorie (200 calories), carbohydrate (16 grams), and fat (7 grams) content than many other protein powders, it can be used as a meal replacement. However, if you choose to swap out a plate of food for this protein shake, consider adding your favorite nut butter, fruits, veggies, and soy or almond milk to ensure you’re getting enough calories and nutrients to feel your best.
Gnarly Vegan is available in chocolate or vanilla. Flavors are sweetened with stevia and evaporated cane juice (sugar).
At $3.87 per serving, this product is much more expensive than the other protein powders featured here, which average $2.21 per serving. However, it might be worth it if you’re looking for a vegan product with added nutrients, digestive enzymes, and probiotics.
See more of the
best vegan protein powders
for additional options.
What customers are saying
In addition to the great taste, many customers on Amazon highlight the nutrition profile as a positive.
“I am fortunate to have a Vitamix, so I just dump in a bunch of ice, some almond milk, a banana, and two scoops of this powder. It blends beautifully and tastes really good. I’ve been using a different plant based protein powder, and I have to say that this one tastes better. There is no aftertaste, and the chocolate flavor seems more like milk chocolate–nice and smooth.”
RBress, verified Amazon customer
Meanwhile, another Amazon customer named Ryan Curry delivered quite the statement about Gnarly Vegan.
“As a 10+ year vegan it is easily the all around best protein/meal replacement I’ve ever used.”
On the other hand, an Amazon reviewer named Samuel H. was not as impressed by the flavor profile.
“I like the idea of having a vegan protein source, however this is too sweet because of the stevia. I am all for flavor but the sweetness overpowers in my opinion.”
Specs
| Protein type | Pea Protein Isolate, Chia Seed Protein, Cranberry Seed Protein |
| Flavors | Vanilla, Chocolate |
| Certifications | NSF Certified Sport |
| Number of servings | 16 |
| Serving size | 2 scoops (50 grams) |
| Nutrition stats per serving | Calories: 200, Total carbs: 16g, Added sugar: 3g, Fat: 7g, Protein: 20g |
Best protein powder for smoothies: Optimum Nutrition 100% Gold Standard Whey
Key product features
What you should know
Optimum Nutrition 100% Gold Standard Whey is a distinguished choice for those seeking post-workout muscle support, offering a blend of whey protein isolate, concentrate, and hydrolyzed whey for a rich amino acid profile and enhanced absorption.
- Although our testers rated the formulation 4.5 out of 5 stars, it’s important to note that some flavors contain artificial flavorings, colors, and sweeteners.
- Packed with 24 grams of protein per serving, Optimum Nutrition 100% Gold Standard Whey represents excellent value at an affordable price point of $1.61 per scoop.
- If you’ve got a sweet tooth and still want to support muscle growth and repair, there are plenty of options available that will add high-quality protein to your shake or smoothie.
Why we like Optimum Nutrition 100% Gold Standard Whey as best for smoothies
Optimum Nutrition 100% Gold Standard Whey features 24 grams of protein to support post-workout muscle growth and recovery. This third-party-tested, gluten-free protein supplement is convenient for making nutrient-dense shakes and smoothies.
Whey protein isolate, whey protein concentrate, and hydrolyzed whey protein are combined to offer 5.5 grams of branched-chain amino acids. Whey protein isolate is 90% protein with minimum carbs and fat. Comparatively, whey protein concentrate is less filtered, contains more fat and carbs, and up to 80% protein. ( 4 ) Hydrolyzed whey protein has been partially broken down to help improve digestion and absorption.
Our testers tried the Chocolate Peanut Butter flavor and rated the formulation 4.5 out of 5 stars. We appreciate the macronutrient breakdown, with only four grams of carbs and two grams of fat. But we could do without the maltodextrin, a fast-absorbing carbohydrate that may quickly raise blood sugar levels. ( 5 )
All flavors have slightly different ingredients. Some, but not all, contain artificial sweeteners and flavors. For instance, Delicious Strawberry includes artificial flavors, colors, and sweeteners, but Strawberry is naturally flavored, colored, and sweetened. If you prefer to steer clear of artificial ingredients, check the ingredients list of your preferred flavor before purchasing.
There are around 20 flavors, so you have plenty of diverse options. Our two expert testers rated the taste of chocolate peanut butter powder 4.5 out of 5 stars. One thought adding real peanut butter to your shake would be a better, less powdery option, while the other raved about the flavor.
They rated solubility 5 out of 5 stars. Our team has tested over 100 protein powders, and we’ve found Optimum Nutrition protein always mixes well in a shaker bottle or blender.
Each scoop costs $1.61, which is rather affordable considering the flavor options, protein content, and third-party testing. For these reasons, we rated the price per serving 4 out of 5 stars.
What customers are saying
Buyers on Amazon appreciate the combination of taste, quality, and solubility, as well as the high amount of protein per serving.
A verified Amazon buyer named Lucas Kaique described the Extreme Milk Chocolate flavor as “just perfectly indulgent.”
“It blends effortlessly with both water and milk, giving me the flexibility to choose my preferred mix,” he wrote. “Optimum Nutrition is a brand I trust, and knowing that I’m getting a blend of whey protein isolates, concentrates, and peptides adds to the confidence in my choice.”
“I have noticed since switching to this protein with the BCAAs blend, I’ve had better recovery times during my workouts and have had the motivation to work out every day again.”
Mike, verified Amazon customer
While Optimum Nutrition earns praise for many of its flavors, some customers have called out particular ones as less than satisfactory.
“It tastes like strawberry milk with a bunch of fake sweetener,” a reviewer named Carrie Carleton wrote about the Tropical Punch flavor.
What our safety lab analysis showed
Our third-party lab analysis showed Optimum Nutrition 100% Gold Standard Whey did not contain unsafe levels of heavy metals, bisphenols, phthalates, or pesticides.
Specs
| Protein type | Whey Protein Isolate, Whey Protein Concentrate, Hydrolyzed Whey Protein |
| Flavors | Cinnamon Roll, Fruity Cereal, Banana Cream, Chocolate Coconut, Chocolate Hazelnut, Chocolate Malt, Chocolate Mint, Chocolate Peanut Butter, Coffee, Cookies & Cream, Delicious Strawberry, Double Rich Chocolate, Extreme Milk Chocolate, French Vanilla Cream, Mocha Cappuccino, Rocky Road, Strawberries & Cream, Strawberry Banana, Vanilla Ice Cream, White Chocolate |
| Certifications | Informed Choice Certified |
| Number of servings | 22-68 |
| Serving size | 1 scoop (33 grams) |
| Nutrition stats per serving | (Chocolate Peanut Butter) Calories: 130, Total carbs: 4g, Added sugar: 0g, Fat: 2g, Protein: 24g |
Best collagen protein powder: Momentous Collagen Peptides
Key product features
What you should know
Momentous Collagen Peptides offer a potent blend of collagen types I and III, derived from grass-fed bovine, to support joint health, skin elasticity, and bone strength, addressing the natural decline in collagen production as we age.
- Our product tester rated the solubility 4 out of 5 stars, noting that it easily dissolved when given an extra stir.
- Although it doesn’t contain quite as much protein per serving as other supplements on this list, Momentous Collagen Peptides still comes in at an affordable price point of $1.73 per serving.
- Since collagen production slows with age, this unflavored supplement is especially beneficial for adults who want to maintain longevity and overall health.
- Momentous Collagen Peptides includes vitamin C and FORTIGEL to support collagen formation in the body.
Why we like Momentous Collagen Peptides as best collagen
Collagen protein is the most abundant protein in the human body, accounting for approximately 30% of the body’s total protein. ( 27 ) It creates the structure for ligaments, tendons, skin, and muscle connective tissue. As we age, our bodies’ natural collagen production declines. This makes products like Momentous Collagen Peptides a desirable supplement.
Momentous Collagen Peptides provides 11.6 grams of collagen peptides from grass-fed bovine and 5.2 grams of FORTIGEL collagen hydrolysate, for a total of 16.8 grams of collagen per serving. Collagen can’t be absorbed in its full form, so it’s broken down into peptides for easy digestion. There are 29 different types of collagen known to science, but Momentous Collagen Peptides consist of types I, II, and III. ( 28 ) Type I provides structure to skin, bones, tendons, and ligaments. Type III is found in connective tissues, bones, and skin. ( 27 )
Collagen peptides may help with joint health and mobility when combined with regular exercise. ( 29 ) They also may support improvements in skin hydration and elasticity and reduce the appearance of wrinkles. Some consider collagen a nutrient that makes them appear and feel younger. ( 30 ) As if that isn’t enough, some could find collagen peptides help maintain and strengthen their bones, making them less likely to fracture, especially later in life. ( 31 )
In addition to collagen peptides, Momentous Collagen Peptides includes vitamin C and FORTIGEL. Vitamin C promotes the natural synthesis of collagen in the body. ( 32 ) FORTIGEL is a patented ingredient containing hydrolyzed collagen broken down into smaller peptides, some of which are absorbed intact and help optimize the formation of new collagen in the body.
The unflavored collagen supplement can be easily mixed into hot or cold beverages, including tea, water, or coffee. Our product tester rated the taste 3.5 out of 5 stars. When combined with whey protein, it wasn’t detectable at all. However, when mixed with coffee, it altered the flavor.
She noticed some floaties when mixed in coffee, but they dissolved easily when given an extra stir. There were no clumps, and we rated solubility 4 out of 5 stars.
What customers are saying
Amazon customers appreciate that this collagen protein powder dissolves well into hot liquids and that it helps support healthy hair, skin, and nails.
A verified buyer named Katie P. had used other Momentous products for years before trying the company’s collagen peptides.
“The most obvious difference that I notice is the growth and strength of my nails,” she wrote. “The powder is flavorless and mixes well in coffee or any beverage. I am a fan and will continue to use it.”
“This is an easy product to add to your morning routine! Little hand mixer in a beverage and you’re ready to go. Flavor is fine and it dissolves quickly.”
Ron, verified Amazon customer
However, at least a few reviews mention issues with the taste.
“The taste is awful and gave me horrible gas pains!” wrote a verified Amazon buyer named Dana.
Specs
| Protein type | Collagen Peptides |
| Flavors | Unflavored |
| Certifications | NSF Certified, Informed Choice |
| Number of servings | 30 |
| Serving size | 1 scoop (16.9 grams) |
| Nutrition stats per serving | Calories: 60, Total carbs: 0g, Added sugar: 0g, Fat: 0g, Protein: 15g |
Best protein powder for athletes: Kaged Protein Isolate Elite
Key product features
What you should know
Kaged Protein Isolate Elite uniquely blends fast-absorbing whey protein with slow-digesting micellar casein and milk protein isolates to provide a sustained release of amino acids for muscle repair and growth, totaling 25 grams of high-quality protein per serving.
- The combination of slow- and fast-digesting proteins promotes muscle growth and repair after a tough training session.
- At $1.88 per serving, Kaged Protein Isolate Elite falls right around the industry standard cost for protein powders.
- Lifters and athletes who put their bodies through rigorous activities will appreciate how whey, casein, and milk protein isolate support optimal recovery.
Why we like Kaged Protein Isolate Elite as best for athletes
With Kaged Protein Isolate Elite, you get a combination of fast- and slow-digesting proteins to support muscle building and repair immediately following a workout and long after. Every serving offers 15 grams of whey protein isolate, 5 grams of micellar casein isolate, and 5 grams of milk protein isolate, totaling 25 grams of high-quality protein.
Whey protein is a fast-absorbing protein that offers a quick dose of amino acids for muscle repair and growth post-workout. It’s estimated that about 10 grams of whey protein is absorbed each hour. ( 33 ) Micellar casein protein powder is a slow-digesting protein that some prefer to take before bed because it provides a slow drip of amino acids to muscles over several hours for potentially improved muscle recovery. ( 34 ) Milk protein isolate is a combination of whey and casein, thereby bolstering the whey and casein protein in every serving.
As you may have noticed, all protein sources are in isolate form, meaning the majority of fat, lactose, and carbs have been removed. This results in the Kaged Protein Isolate Elite having low fat and carb content, specifically one and a half grams of fat and three grams of carbs.
Kaged Protein Isolate Elite contains MAXCatalyst, a patented ingredient derived from black pepper extract, that may improve the absorption of nutrients, including amino acids, so they can make it to your muscles.
The product is sweetened with steviol glycosides and sucralose. However, our testers love how Kaged whey protein never tastes of artificial sweeteners.
What customers are saying
Over on Amazon, customers mention the quality of ingredients, solubility, and value as the best features of Kaged Protein Isolate Elite.
“I love the fact that you only use one scoop! It tastes good! And it works for me because I do not get bloated and I feel good after! I totally recommend. I do exercise and this is perfect for me!”
Amazon85, verified Amazon buyer
However, a verified Amazon buyer named Daniel Navarro took issue with the taste.
“The flavor is good but they REALLY overdid it with the sweetness. You must have a sweet tooth or something to tone it down to stand it.”
Specs
| Protein type | Whey Protein Isolate, Casein Isolate, Milk Protein Isolate |
| Flavors | Cookies & Cream, Vanilla, Chocolate |
| Certifications | Informed Sport Certified |
| Number of servings | 24 |
| Serving size | 1 scoop |
| Nutrition stats per serving | Calories: 130, Total carbs: 3g, Added sugar: 0g, Fat: 1.5g, Protein: 25g |
Best protein powder for women: Thorne Whey Protein Isolate
Key product features
What you should know
Thorne Whey Protein Isolate is tailored to support muscle maintenance and recovery with 21 grams of high-quality, fast-absorbing whey isolate, making it an ideal choice for women and men alike who engage in strength training or regular exercise.
- The addition of two digestive enzymes (bromelain and papain) helps with nutrient absorption and may also provide anti-inflammatory properties.
- With 21 grams of protein in each scoop, Thorne Whey Protein Isolate also offers 2.3 grams of leucine, an amino acid that can support muscle growth.
- Women and men who want to learn out or maintain their weight can benefit from a clean protein powder that only contains 100 calories per serving.
Why we like Thorne Whey Protein Isolate as best for women
Thorne Whey Protein Isolate offers 21 grams of fast-absorbing whey isolate with flavors and sweeteners derived from natural sources. The product is formulated to support muscle maintenance, growth, and repair post-injury or workout. These are important considerations for women who strength train or exercise often.
That said, there aren’t protein ingredients in protein powders that affect men and women differently mechanistically. In other words, there’s no reason women shouldn’t use the same protein powders as men when it comes to muscle protein building or conditioning in response to training.
Whey protein isolate is known for its incredible bioavailability, meaning your body digests, absorbs, and utilizes the vast majority of amino acids supplied from it. With 21 grams of protein, each serving supplies enough to activate muscle protein synthesis and work towards muscle building and recovery.
Thorne Whey Protein Isolate has a low-calorie content, much of which is due to its low carb and fat content. With this product, you’ll still get the protein you need for strong muscles, but won’t add an excess of sugar or fat, making it easier to achieve weight loss or maintenance.
Added to the ingredients are bromelain and papain, digestive enzymes that help break down protein for enhanced absorption. ( 35 ) These enzymes are anti-inflammatory and may support the relief of arthritis, chronic pain, and wound healing. ( 36 )
Flavor options include vanilla and chocolate, so you won’t be overwhelmed by too many choices. Flavors are sweetened with one gram of sugar and stevia, a natural sweetener. Stevia is extra sweet, and some find it overpowering when included in protein powders.
What customers are saying
Reviewers on Amazon provide positive feedback about the taste, as well as how it mixes into liquids without any chalkiness or grittiness.
“For years, I’ve tried every protein powder I could find. All of them were gritty and chalky and downright disgusting to drink,” wrote an Amazon customer named Chantal Watts. “This protein powder is phenomenal. The flavor is subtle and tasty, it’s not chalky and gritty. I look forward to my shake every day.”
“While the price is a little high, you do get a quality product that tastes good. I’ve spent less money but didn’t use the product because I couldn’t stomach the awful flavor.”
Mia, verified Amazon customer
That said, some customers didn’t like the taste.
“The flavor is just way off for me,” an Amazon buyer named Matthew B. “It tastes like something artificial or plastic like almost.”
Specs
| Protein type | Whey Protein Isolate |
| Flavors | Whey Protein Isolate |
| Certifications | NSF Certified |
| Number of servings | 30 |
| Serving size | 1 scoop |
| Nutrition stats per serving | Calories: 100, Total carbs: 4g, Added sugar: 1g, Fat: 1g, Protein: 21g |
Our supplements testing methodology
We’re committed to providing protein powder reviews you can trust. That means testing each product we recommend, providing you with genuine and impartial feedback. Learn more about our supplements testing methodology for more information on each factor. From ingredient purity to efficacy to taste and more, here’s how we evaluated the protein powders in this review.
Testing criteria
Efficacy—40%
Consumers turn to dietary supplements to achieve specific health benefits and reach their performance goals, which is why we examine whether a supplement delivers on its promised benefits. Efficacy doesn’t just mean the effectiveness of the product in achieving its claims, but also the evidence that supports those claims.
Here’s what we look for:
- Clinical evidence
- Calories per serving
- Dose efficacy
- Synergistic effects
- Proprietary blends
Safety and side effects—35%
Health risks, adverse effects, and safety profiles are all factors to consider in a supplement. We ensure the safety of these products through testing, so you can trust the safety of the products you purchase.
We evaluate:
- Reported side effects
- Third-party testing
- Manufacturer accreditation
- Artificial sweeteners
Value—20%
Value isn’t just price—it’s also quality and efficacy for the price. We factor in a cost analysis to determine the true worth of a supplement in relation to its price and identify products that offer a solid return on investment.
Our factors in this rating include:
- Price per serving
Customer experience—5%
A customer’s experience with a company directly impacts satisfaction, loyalty, and the likelihood of repeat purchases. We include it in our testing process because the consumer experience guides purchasing decisions.
Our factors in this rating include:
- Ease of purchase
- Shipping and returns
- Customer support
About our chemical lab analysis
Our dedicated team of product testers have hands-on experience using the protein powders we evaluate. In this article, we incorporate their insightful feedback, including both the positive and less favorable aspects of each supplement. However, our commitment to transparency doesn’t end there.
To guarantee the products we recommend are from credible and reputable brands adhering to industry-standard best practices for quality and safety, we took the extra step of subjecting them to third-party testing by Ellipse Analytics. Many of the products underwent thorough analysis for safety, purity, and ingredient accuracy. The testing confirms the accuracy of ingredient amounts and ensures the absence of harmful levels of contaminants, pesticides, heavy metals, bisphenols, and phthalates.
The results of these assessments are incorporated into the individual reviews.
What is Protein Powder?
Protein powder is a nutritional supplement that’s protein-rich, containing at least 10 grams of protein per serving, typically 20 grams per serving or more. The protein is often sourced from whey, casein, collagen, or plant-based sources such as yellow split peas, rice, and more. Many protein powders are flavored either naturally or artificially, though some are unflavored. Protein powder is designed to be added to a liquid beverage, such as water or milk, but may also be suitable for baking. Carbohydrate and fat content can widely vary by product.
Benefits of Protein Powder
The key role of protein powder is adding more protein to your diet, which supports a variety of important bodily functions such as muscle maintenance and growth, repairing cells in general, and overall health. ( 1 ) Protein powder is typically shelf-stable and easily portable, making it an easy and effective way to add protein to your diet.
How to Choose the Best Protein Powder
There are a wide range of protein powders available on the market, and the best protein powder for you can depend on your dietary needs and preferences, as well as your lifestyle. Those who are more active will likely have higher protein needs. And those who follow a vegetarian or vegan diet should choose a plant-based protein powder. Different types of protein powder can come with different benefits. For example, whey is considered more anabolic than many other protein sources and may be more effective at building muscle. ( 4 ) It’s also important to take into consideration any dietary allergies.
How to Use Protein Powder
Protein powder is typically mixed with water or another liquid beverage. Be sure to follow the instructions of whichever product you choose, since serving sizes vary. Many protein powders come with a scoop to make it easy to measure out servings. Simply blend the appropriate serving of protein powder into your beverage of choice. Blending protein powder can be easily done in a blender bottle or electric blender.
Potential Side Effects of Protein Powder
Side effects of protein powder can vary by person. Some people are lactose intolerant or sensitive, and may experience digestive discomfort or bloating from consuming a whey-based protein powder. Those with dietary allergies or sensitivities should check the nutrition label before purchasing a protein powder. It’s best to purchase a protein powder from a reputable brand, such as those listed above. As always, you may consult with your doctor, a certified nutritionist, or a registered dietician before adding a nutritional supplement like protein powder to your diet.
Who should take protein powder?
Anyone unable to get the protein they need from food alone may benefit from taking protein powder. Athletes and bodybuilders often use protein powder to meet higher protein needs to maintain or build muscle. ( 3 )
But protein powder isn’t just for athletes. Anyone unable to meet protein needs from food alone may need to take protein powder, like those following a reduced-calorie diet for weight loss, older adults with a poor appetite, or weight-loss surgery patients with protein deficiency.
Research shows that higher protein diets may support weight loss by enhancing body composition (helping you lose fat and retain muscle), controlling hunger, and increasing metabolism. ( 39 ) Protein powder may help people trying to lose weight get the extra protein they need in a convenient and easy to use form.
When supplementing with protein powder for weight loss, you need to include it as part of your balanced eating plan. Adding a protein supplement without modifying your usual intake may increase calorie intake, leading to weight gain.
Older adults may also benefit from taking protein powder when they’re unable to meet their higher protein needs due to changes in appetite. ( 40 ) A decrease in appetite and food intake is normal as you get older, but often leads to weight loss and an excessive loss of muscle mass (sarcopenia) that affects strength and mobility. ( 40 , ( 17 ) Adding protein powder to hot cereal, soup, or casseroles is an easy way for older adults to get more protein without affecting appetite.
People who had weight loss surgery may also take protein powder. Protein deficiency is a complication of weight loss surgery, causing hair loss, muscle loss, and poor wound healing. ( 41 ) Protein and protein quality are important, and foods high in leucine are encouraged following weight loss surgery. ( 41 ) For those unable to meet protein needs from food, a protein powder rich in leucine, like whey or pea, may reduce risk of deficiency. ( 42 )
What ingredients to look for in protein powder
Since the goal is to get more protein, you want a supplement with protein as the main ingredient. Protein powders may contain other ingredients you may want and some you don’t.Check the nutrition label and ingredients list to find the information you need.
Protein
You want a powder that lists a protein as the first ingredient, such as whey, casein, pea, soy, or egg. These proteins provide all of the essential amino acids your body needs. ( 1 ) Choose the protein that best aligns with your personal preferences, diet needs, and health goals.
Other active ingredients
Protein is the main active ingredient in all protein powders, but some may contain other ingredients, such as creatine, branch-chain amino acids (BCAA), probiotics, fiber, digestive enzymes, or MCT oil.
Some of the added ingredients may support your goals, like creatine for exercise performance and fiber to support regular bowel movements. ( ( 18 , 43 ) But some may cause side effects, like abdominal pain with MCT oil. ( 43 )
You want to pay close attention to the other active ingredients listed on the label to make sure you’re getting what you want and need. Talk to your doctor or consult with a registered dietitian for personalized guidance.
Sweeteners
Protein powders may use sweeteners to improve flavor, including sugar and nonnutritive sweeteners. You want a protein powder that has little to no added sugar so you don’t consume any unnecessary calories that offer no health benefits. ( 44 )
Nonnutritive sweeteners keep protein powders sugar free, but may include artificial sweeteners like sucralose or acesulfame potassium. Though artificial sweeteners are generally recognized as safe, it’s always best to limit intake of artificial ingredients. ( 16 ) Natural sugar-free sweeteners like stevia or monk fruit are better options, but they can have a bitter aftertaste.
Try to avoid protein powders with added fillers, preservatives, and artificial flavors and colors.
How much protein powder should I take?
The amount of protein powder to take depends on needs, goals, and usual diet. Protein powder is a supplement and shouldn’t replace real food.
Though there’s no set number for how much protein powder to take, using the supplement once or twice a day—1-2 servings—may provide the extra protein you need to reach your goals.
The ISSN says to maintain and build muscle, you need 20-40 grams of protein every three to four hours. ( 3 ) Protein powder is a convenient way to get the necessary protein when you can’t eat a high-protein meal or snack.
You may also take protein powder after a workout when you don’t have the appetite to eat, so you get the amino acids necessary for muscle-building. ( 3 ) Though, current research suggests that you no longer need to consume protein immediately after a workout to support muscle recovery. ( 3 ) Your muscles remain sensitive to protein for up to 24 hours after a workout and any protein-rich meal you eat within that period boosts muscle protein synthesis. ( 3 )
FAQs
Should I take protein powder every day?
Whether you should use protein powder every day depends on several factors, including diet, age, activity level, and fitness goals. Aging adults and athletes wanting to build muscle have higher protein needs and may benefit from a daily protein supplement to help meet their daily intake needs. Taking daily protein powder is unnecessary if you already eat plenty of protein through food.
When is the best time of day to take protein powder?
It’s essential to prioritize overall daily protein intake rather than focusing solely on the timing of your protein powder intake. That said, one of the best times to take protein powder is post-workout to support muscle recovery and development of size and/or performance, depending on how you exercise. It’s also important to consume adequate protein with breakfast, to ensure a positive muscle protein balance after sleep, between meals to manage hunger, and before bedtime to support muscle recovery throughout the night.
Is protein powder good for you?
A good protein powder can be a helpful supplement to boost protein intake for those with elevated protein needs. It may be good for you if you struggle to eat enough protein through food alone and benefit from the convenience of a supplement. However, protein powder should not replace a balanced diet, including a variety of whole foods.
How much protein should you eat per day?
Most Americans meet the recommended dietary allowance (RDA) for protein of 0.8 grams per kilogram daily. ( 37 ) However, physically active adults have greater protein needs. According to the Academy of Nutrition and Dietetics, athletes need 1.2 to 2 grams of protein per kilogram daily. ( 38 ) For these individuals, consuming enough protein through food alone can be challenging, and protein powder may come in handy.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any diseases.
Our experts
Robert Wildman, Phd, RD, LD, CISSN, FISSN
Dr Robert Wildman (“Dr Rob”) is a globally renowned exercise, fitness, and nutrition expert who speaks around the world on exercise and sport nutrition, and continues to work with professional and elite athletes to achieve their highest level of performance as well as health and fitness. Rob received his PhD from The Ohio State University, earned his MS from Florida State University, and earned his BS from the University of Pittsburgh. He is also a registered and licensed dietitian.
Amanda Dvorak, CPT
Amanda Dvorak has been writing fitness and nutrition content for over three years. She played softball throughout her childhood and started doing CrossFit in 2015. While she still enjoys doing CrossFit workouts in her garage gym, she also loves lifting heavy weights, running, and hiking. Amanda is currently studying to become a certified personal trainer through the International Sports Sciences Association (ISSA).
Jessica Coulon
Jessica Coulon is a writer and editor who specializes in fitness, health, nutrition, and science content. Previously, she was an editor for Popular Mechanics and Bicycling, where she covered pro cycling news, wrote how-to guides, and tested all the latest and greatest bike gear. She was also a regular shoe tester and contributor for Runner’s World. You can often find her skiing or riding her mountain bike, and racing with the F1RE female enduro team.
Kelly Uhler
Kelly has a multifaceted background in elder care, health care, and copywriting. She has worked for organizations such as A Place For Mom and Homecare.com, which gave her the opportunity to work closely with families, providing reliable information to help them make informed decisions about their loved one’s health, safety, and quality of life.
Perry Nix
MS, RD, LD
About Author
Perry Nix, MS, RD, LD, is a registered dietitian and freelance nutrition writer who resides in Texas with her two rambunctious boys and firefighter husband. She earned her degrees from Texas Tech University and has since gained experience in public health, corporate wellness, and clinical settings. Today, she enjoys writing about sports nutrition and teaching others how to properly fuel for an active, adventurous, and balanced lifestyle.
References
-
- Harvard School of Public Health. Protein. Accessed December 30, 2023.
- Kerstetter JE, Kenny AM, Insogna KL. Dietary protein and skeletal health: a review of recent human research. Curr Opin Lipidol. 2011;22(1):16-20. http://doi:10.1097/MOL.0b013e3283419441
- Jäger R, Kerksick CM, Campbell BI, et al. International Society of Sports Nutrition Position Stand: protein and exercise. J Int Soc Sports Nutr. 2017;14:20. Published 2017 Jun 20. https://doi.org/10.1186/s12970-017-0177-8
- Moon, J.M., Ratliff, K.M., Blumkaitis, J.C, Harty, P.S, Zabriskie, H.A, Stecker, R.A., Currier, B.S., Jagim, A.R., Jäger, R., Purpura, M., & Kerksick CM. (2020, December 1). Effects of daily 24-gram doses of rice or whey protein on resistance training adaptations in trained males. J Int Soc Sports Nutr, 17(1):60. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7706190/
- Madureira AR, Pereira CL., Gomes AMP, Pintado ME, Xavier Malcata F. Bovine whey proteins – Overview on their main biological properties. Food Res Int. 2007;40(10):1197-1211. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7126817/
- Hofman DL, van Buul VJ, Brouns FJ. Nutrition, Health, and Regulatory Aspects of Digestible Maltodextrins. Crit Rev Food Sci Nutr. 2016 Sep 9;56(12):2091-100. https://doi.org/10.1080/10408398.2014.940415 . PMID: 25674937; PMCID: PMC4940893.
- Nutrition and Athletic Performance. Medicine & Science in Sports & Exercise 41(3):p 709-731, March 2009. | http://DOI: 10.1249/MSS.0b013e31890eb86
- Chen IJ, Liu CY, Chiu JP, Hsu CH. Therapeutic effect of high-dose green tea extract on weight reduction: A randomized, double-blind, placebo-controlled clinical trial. Clin Nutr. 2016;35(3):592-599. http://doi:10.1016/j.clnu.2015.05.003
- Slywitch E, Savalli C, Duarte ACG, Escrivão MAMS. Iron Deficiency in Vegetarian and Omnivorous Individuals: Analysis of 1340 Individuals. Nutrients . 2021; 13(9):2964. https://doi.org/10.3390/nu13092964
- Science Direct. (n.d.). Pea Protein. https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/pea-protein
- Guillin FM, Gaudichon C, Guérin-Deremaux L, Lefranc-Millot C, Airinei G, Khodorova N, Benamouzig R, Pomport PH, Martin J, Calvez J. Real ileal amino acid digestibility of pea protein compared to casein in healthy humans: a randomized trial. Am J Clin Nutr. 2022 Feb 9;115(2):353-363. https://doi.org/10.1093/ajcn/nqab354 . PMID: 34665230.
- Lopez MJ, Mohiuddin SS. Biochemistry, Essential Amino Acids. [Updated 2023 Mar 13]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK557845/
- Martínez Y, Li X, Liu G, Bin P, Yan W, Más D, Valdivié M, Hu CA, Ren W, Yin Y. The role of methionine on metabolism, oxidative stress, and diseases. Amino Acids. 2017 Dec;49(12):2091-2098. https://doi.org/10.1007/s00726-017-2494-2 . Epub 2017 Sep 19. PMID: 28929442.
- Martinho DV, Nobari H, Faria A, Field A, Duarte D, Sarmento H. Oral Branched-Chain Amino Acids Supplementation in Athletes: A Systematic Review. Nutrients . 2022; 14(19):4002. https://doi.org/10.3390/nu14194002
- Mitchell WK, Wilkinson DJ, Phillips BE, Lund JN, Smith K, Atherton PJ. Human Skeletal Muscle Protein Metabolism Responses to Amino Acid Nutrition. Adv Nutr. 2016 Jul 15;7(4):828S-38S. https://doi.org/10.3945/an.115.011650 . PMID: 27422520; PMCID: PMC4942869.
- Magnuson BA, Roberts A, Nestmann ER. Critical review of the current literature on the safety of sucralose. Food Chem Toxicol. 2017;106(Pt A):324-355. https://doi.org/10.1016/j.fct.2017.05.047
- Volpi E, Nazemi R, Fujita S. Muscle tissue changes with aging. Curr Opin Clin Nutr Metab Care. 2004 Jul;7(4):405-10. https:/doi.org/10.1097/01.mco.0000134362.76653.b2 . PMID: 15192443; PMCID: PMC2804956.
- Barber TM, Kabisch S, Pfeiffer AFH, Weickert MO. The Health Benefits of Dietary Fibre. Nutrients. 2020 Oct 21;12(10):3209. https:/doi.org/10.3390/nu12103209 . PMID: 33096647; PMCID: PMC7589116.
- Wilkinson DJ, Hossain T, Limb MC, Phillips BE, Lund J, Williams JP, Brook MS, Cegielski J, Philp A, Ashcroft S, Rathmacher JA, Szewczyk NJ, Smith K, Atherton PJ. Impact of the calcium form of β-hydroxy-β-methylbutyrate upon human skeletal muscle protein metabolism. Clin Nutr. 2018 Dec;37(6 Pt A):2068-2075. https://pubmed.ncbi.nlm.nih.gov/29097038/ . Epub 2017 Oct 6. PMID: 29097038; PMCID: PMC6295980.
- Córdova-Martínez A, Caballero-García A, Bello HJ, Pérez-Valdecantos D, Roche E. Effect of Glutamine Supplementation on Muscular Damage Biomarkers in Professional Basketball Players. Nutrients . 2021; 13(6):2073. https://doi.org/10.3390/nu13062073
- Murray B, Rosenbloom C. Fundamentals of glycogen metabolism for coaches and athletes. Nutr Rev. 2018 Apr 1;76(4):243-259. https://doi.org/10.1093/nutrit/nuy001 . PMID: 29444266; PMCID: PMC6019055.
- Margolis LM, Allen JT, Hatch-McChesney A, Pasiakos SM. Coingestion of Carbohydrate and Protein on Muscle Glycogen Synthesis after Exercise: A Meta-analysis. Med Sci Sports Exerc. 2021 Feb 1;53(2):384-393. https://doi.org/10.1249/MSS.0000000000002476 . PMID: 32826640; PMCID: PMC7803445.
- Centers for Disease Control and Prevention. https://www.cdc.gov/diabetes/healthy-eating/fiber-helps-diabetes.html?CDC_AAref_Val=https://www.cdc.gov/diabetes/library/features/role-of-fiber.html Updated June 20, 2022. Accessed December 27, 2023.
- Dorans KS, Bazzano LA, Qi L, He H, Chen J, Appel LJ, Chen CS, Hsieh MH, Hu FB, Mills KT, Nguyen BT, O’Brien MJ, Samet JM, Uwaifo GI, He J. Effects of a Low-Carbohydrate Dietary Intervention on Hemoglobin A1c: A Randomized Clinical Trial. JAMA Netw Open. 2022 Oct 3;5(10):e2238645. https:/doi.org/10.1001/jamanetworkopen.2022.38645 . PMID: 36287562; PMCID: PMC9606840.
- National Institutes of Health. Probiotics: Fact Sheet for Health Professionals. Updated November 3, 2023. Accessed December 27, 2023.
- Ford AC, Quigley EM, Lacy BE, et al. Efficacy of prebiotics, probiotics, and synbiotics in irritable bowel syndrome and chronic idiopathic constipation: systematic review and meta-analysis. Am J Gastroenterol. 2014;109(10):1547-1562. http://doi:10.1038/ajg.2014.202
- Cleveland Clinic. Collagen. Updated May 23, 2022. Accessed December 29, 2023.
- Shenoy M, Abdul NS, Qamar Z, Bahri BMA, Al Ghalayini KZK, Kakti A. Collagen Structure, Synthesis, and Its Applications: A Systematic Review. Cureus. 2022;14(5):e24856. Published 2022 May 9. http://doi:10.7759/cureus.24856
- Khatri M, Naughton RJ, Clifford T, Harper LD, Corr L. The effects of collagen peptide supplementation on body composition, collagen synthesis, and recovery from joint injury and exercise: a systematic review. Amino Acids. 2021;53(10):1493-1506. http://doi:10.1007/s00726-021-03072-x
- de Miranda RB, Weimer P, Rossi RC. Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis. Int J Dermatol. 2021;60(12):1449-1461. http://doi:10.1111/ijd.15518
- Zdzieblik D, Oesser S, König D. Specific Bioactive Collagen Peptides in Osteopenia and Osteoporosis: Long-Term Observation in Postmenopausal Women. J Bone Metab. 2021;28(3):207-213. http://doi:10.11005/jbm.2021.28.3.207
- DePhillipo NN, Aman ZS, Kennedy MI, Begley JP, Moatshe G, LaPrade RF. Efficacy of Vitamin C Supplementation on Collagen Synthesis and Oxidative Stress After Musculoskeletal Injuries: A Systematic Review. Orthop J Sports Med. 2018;6(10):2325967118804544. Published 2018 Oct 25. https://pubmed.ncbi.nlm.nih.gov/30386805/
- Schoenfeld BJ, Aragon AA. How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution. J Int Soc Sports Nutr. 2018 Feb 27;15:10. https:/doi.org/10.1186/s12970-018-0215-1 . PMID: 29497353; PMCID: PMC5828430.
- Kim J. Pre-sleep casein protein ingestion: new paradigm in post-exercise recovery nutrition. Phys Act Nutr. 2020 Jun 30;24(2):6-10. https://doi.org/10.20463/pan.2020.0009 . PMID: 32698256; PMCID: PMC7451833.
- Bekhit AA, Hopkins DL, Geesink G, Bekhit AA, Franks P. Exogenous proteases for meat tenderization. Crit Rev Food Sci Nutr. 2014;54(8):1012-31. https://doi.org/10.1080/10408398.2011.623247 . PMID: 24499119.
- Madkhali JY, Hussein RH, Alnahdi HS. Therapeutic effect of bromelain and papain on intestinal injury induced by indomethacin in male rats. Int J Health Sci (Qassim). 2023 Sep-Oct;17(5):23-30. PMID: 37692988; PMCID: PMC10484068 .
- Snetselaar LG, de Jesus JM, DeSilva DM, Stoody EE. Dietary Guidelines for Americans, 2020-2025: Understanding the Scientific Process, Guidelines, and Key Recommendations. Nutr Today. 2021;56(6):287-295. https://pubmed.ncbi.nlm.nih.gov/34987271/
- Carbone JW, Pasiakos SM. Dietary Protein and Muscle Mass: Translating Science to Application and Health Benefit. Nutrients. 2019;11(5):1136. Published 2019 May 22. http:doi:10.3390/nu11051136
- Moon, J., & Koh, G. (2020). Clinical Evidence and Mechanisms of High-Protein Diet-Induced Weight Loss. Journal of obesity & metabolic syndrome , 29 (3), 166–173. https://doi.org/10.7570/jomes20028
- Chapman, I., Oberoi, A., Giezenaar, C., & Soenen, S. (2021). Rational Use of Protein Supplements in the Elderly-Relevance of Gastrointestinal Mechanisms. Nutrients , 13 (4), 1227. https://doi.org/10.3390/nu13041227
- Sherf Dagan, S., Goldenshluger, A., Globus, I., Schweiger, C., Kessler, Y., Kowen Sandbank, G., Ben-Porat, T., & Sinai, T. (2017). Nutritional Recommendations for Adult Bariatric Surgery Patients: Clinical Practice. Advances in nutrition (Bethesda, Md.) , 8 (2), 382–394. https://doi.org/10.3945/an.116.014258
- Babault, N., Païzis, C., Deley, G., Guérin-Deremaux, L., Saniez, M. H., Lefranc-Millot, C., & Allaert, F. A. (2015). Pea proteins oral supplementation promotes muscle thickness gains during resistance training: a double-blind, randomized, Placebo-controlled clinical trial vs. Whey protein. Journal of the International Society of Sports Nutrition , 12 (1), 3. https://doi.org/10.1186/s12970-014-0064-5
- Kerksick, C. M., Wilborn, C. D., Roberts, M. D., Smith-Ryan, A., Kleiner, S. M., Jäger, R., Collins, R., Cooke, M., Davis, J. N., Galvan, E., Greenwood, M., Lowery, L. M., Wildman, R., Antonio, J., & Kreider, R. B. (2018). ISSN exercise & sports nutrition review update: research & recommendations. Journal of the International Society of Sports Nutrition , 15 (1), 38. https://doi.org/10.1186/s12970-018-0242-y
- American Heart Association. Added sugars. Accessed July 6, 2024. https://www.heart.org/en/healthy-living/healthy-eating/eat-smart/sugar/added-sugars