The effect of a test meal on plasma vasoactive intestinal polypeptide (VIP), gastric inhibitory polypeptide (GIP), and secretin in man.

In six fasting healthy young male students a 15-min test meal consisting of 160 ml milk, 200 ml coffee, 70 g bread, 3.5 g butter, 35 g cheese, and 30 g ham (45 g carbohydrates, 30 g proteins, and 25 g fat) caused a late but significant elevation in plasma vasoactive intestinal polypeptide (VIP), an early and sustained significant rise in plasma gastric inhibitory polypeptide (GIP), but no significant change in plasma secretin.