Role and Significance of Dietary Protein in the Management of Type 2 Diabetes and Its Complications in India: An Expert Opinion

Background: Obesity, prediabetes, and type 2 diabetes mellitus (T2DM) pose a triple burden in India. Almost two-thirds of people with diabetes (PWD) in India are found to have suboptimal glycemic, blood pressure, and lipid control. Medical nutrition therapy (MNT) in diabetes has emphasized on the amount and type of carbohydrates for years. However, protein, an important macronutrient in diabetes management, needs to be focused upon, especially in India, where the consumption is found to be lower than the recommendations provided by most guidelines.

Aim: An expert committee attempted to review the role of dietary protein in the management of T2DM, arrive at a consensus on the significance of increasing dietary protein for various benefits, and offer practical guidance on ways to improve protein intake among Indians.

Methodology: A total of 10 endocrinologists and diabetologists, one nephrologist, and three registered dietitians representing four zones of India formed the expert committee. An in-depth review of literature in the Indian context was carried out, and the draft document was shared with the expert committee, and their views were incorporated into the same. The expert committee then assembled virtually to deliberate on various aspects of the role of protein in T2DM management. The experts from various specialties gave their valuable inputs and suggestions from their extensive personal clinical experience and research work, which helped to reach a consensus on the role and significance of protein in the management of T2DM and its complications in India.

Results: There is abundant evidence that MNT is essential for the prevention and management of T2DM and its complications. Experts agreed that increasing protein intake offers myriad health benefits, namely reducing glycemic variability, improving glycemic control, increasing insulin sensitivity, improvement in lipid profile and immunity, and helping in weight management and preservation of muscle mass in PWD. The expert committee suggested aiming for an increase in protein intake by at least 5-10% of the current intake in lieu of carbohydrates in PWD. Experts also highlighted the need for more data quantifying the unmet protein needs in the Indian PWD, especially among vegetarians. Randomized controlled trials to study the effect of protein in diabetes complications such as cardiovascular disease (CVD) and diabetic kidney disease (DKD) and comorbid conditions such as sarcopenia among the Indian population are also warranted.

Conclusion: Increasing protein quantity and quality in the diets of Indian PWD could significantly contribute to positive health outcomes. Increased protein intake, preferably through dietary sources to meet the requirements and, when required using diabetes-specific protein supplements (DSPS), is recommended in the prevention and control of T2DM.