Cholesterol-lowering potential in human subjects of fat from pigs fed rapeseed oil

Br J Nutr. 2000 Aug;84(2):143-50.

Abstract

The possibility of achieving blood-lipid-lowering characteristics of pig fat by increasing the content of unsaturated fat in pig feed was evaluated. Three pig feeding regimens were applied: basal feed (no added fat or vitamin E), basal feed + rapeseed oil (60 g/kg feed), and basal feed + rapeseed oil (60 g/kg) + vitamin E (200 mg/kg). Meat and meat products from the three pig groups were incorporated into diets providing 86 g pig fat/10 MJ. The diets were served to twelve healthy human male subjects for 3 weeks each in a randomised crossover design. The diets prepared from pigs fed rapeseed oil had a lower content of saturated fatty acids (approximately 9 v. 11% of energy) and a higher content of polyunsaturated fatty acids (approximately 6 v. 4% of energy) than the diet prepared from pigs fed the basal feed. Diets based on fat from pigs fed the rapeseed oil resulted in significantly lower (approximately 4%, P = 0.019) total serum cholesterol concentration compared with the diet from pigs fed the basal feed. No differences were observed in LDL-, HDL- or VLDL-cholesterol, or in triacylglycerol or VLDL-triacylglycerol concentrations. Addition of vitamin E to the pig feed resulted in only a minor increase in vitamin E content in the human subjects' diet and the vitamin E content was low in all three pig diets. Plasma vitamin E concentration in the human subjects at the end of the period with diets from pigs fed rapeseed oil without vitamin E was significantly lower (P = 0.04) than in the other two diet periods. In conclusion, an increased content of rapeseed oil in pig feed changes the fatty acid composition of the pig fat in a way that has a potential to reduce blood cholesterol concentrations in human subjects. However, intake of pig fat with a higher content of unsaturated fatty acids needs to be matched by a higher dietary intake of vitamin E.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Animal Feed
  • Animals
  • Brassica*
  • Cholesterol / blood*
  • Cross-Over Studies
  • Dietary Fats, Unsaturated / blood*
  • Fatty Acids, Unsaturated / blood*
  • Female
  • Humans
  • Lipoproteins / blood
  • Male
  • Middle Aged
  • Swine
  • Vitamin E / administration & dosage*
  • Vitamin E / blood*

Substances

  • Dietary Fats, Unsaturated
  • Fatty Acids, Unsaturated
  • Lipoproteins
  • Vitamin E
  • Cholesterol