The whey protein-enriched beverage led to increased plasma concentrations of cholecystokinin ( CCK ) at 60 and 75min ( P < 0.05 ) , glucagon-like peptide-1 ( GLP-1 ) at 90min ( P < 0.001 ) , peptide tyrosine-tyrosine ( PYY ) at 90 and 120min ( P < 0.01 ) and pancreatic polypeptide ( PP ) from 15 to 120min ( P < 0.05 ) compared with maltodextrin carbohydrate .