Journal
DIABETES OBESITY & METABOLISM
Volume 13, Issue 9, Pages 863-865Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1463-1326.2011.01420.x
Keywords
glucagon-like peptide-1; glucose-dependent insulinotropic polypeptide; incretins; insulin; lipid; man; obesity; protein
Categories
Funding
- Swedish Research Council [6834]
- Region Skane
- Faculty of Medicine, Lund University
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Protein elicits a stronger early (30 min) glucose-dependent insulinotropic polypeptide (HIP) response than fat ingestion in lean individuals, with no difference in glucagon-like peptide-1 (GLP-1). We assessed the incretin hormone response to protein versus fat ingestion in obesity. Equicaloric (8 kcal/kg) fat (olive oil) or protein (whey protein) was ingested by non-diabetic obese male volunteers [body mass index (BMI) > 30 kg/m(2); n = 12] and plasma GIP and GLP-1 were determined. We found no difference in the early HIP or GLP-1 responses to fat versus protein. However, the total 300 min GIP response was greater after fat than after protein ingestion (20.3 +/- 3.9 vs. 10.0 +/- 2.8 nmol/l x min; p = 0.026); whereas the 300-min GLP-1 responses were the same. Thus, in obesity, protein and fat ingestion elicit similar early (30 min) incretin hormone responses, whereas 300-min HIP secretion is more pronounced oiler fat than protein ingestion.
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