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Eur J Clin Nutr. 2012 Jan;66(1):32-8. doi: 10.1038/ejcn.2011.142. Epub 2011 Jul 27.

Acute differential effects of milk-derived dietary proteins on postprandial lipaemia in obese non-diabetic subjects.

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  • 1Department of Endocrinology and Metabolism MEA, Aarhus University Hospital, Aarhus, Denmark. holmer-jensen@ki.au.dk

Abstract

BACKGROUND/OBJECTIVES:

Postprandial lipaemia is an established risk factor for atherosclerosis. To investigate the acute effect of four milk-derived dietary proteins (alpha-lactalbumin, whey isolate, caseinoglycomacropeptide and whey hydrolysate) on postprandial lipaemia, we have conducted a randomized, acute, single-blinded clinical intervention study with crossover design.

SUBJECTS/METHODS:

A total of 11 obese non-diabetic subjects (age: 44-74, BMI: 30-41.4 kg m(-2)) were included. On 4 different days the subjects ingested a high-fat meal with the following energy distribution: 66% energy from fat (100 g of butter), 15% of energy from carbohydrate (90 g of white wheat bread) and 19% of energy from protein (45 g of pure protein). Our primary variable was plasma triglyceride measured in the 8-h postprandial period. Secondarily, retinyl palmitate, non-esterified free fatty acids, glucose, insulin, glucagon, GLP-1 and GIP, active and total grehlin and cholecystokinin were measured.

RESULTS:

We observed no statistically significant (P=0.8) differences between meals on our primary variable that is, triglycerides. Whey hydrolysate was associated with a significantly (P=0.02) smaller postprandial suppression of non-esterified free fatty acids compared with the other dietary proteins.

CONCLUSION:

We did not observe significant differences in postprandial lipaemia to the four milk-derived dietary proteins. Whey hydrolysate caused less postprandial suppression of free fatty acids.

[PubMed - indexed for MEDLINE]
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