Thalamus perfusion:↓ In men with T2D and O with M-meal vs. V-meal↓ In H men with V-meal vs. M-mealPostprandial secretion of active GLP-1:↑ 42% in men with T2D with V-meal vs. M-meal↑ 41% in H men with V-meal vs. M-meal↑ Satiety and insulin secretion following V-meal vs. M-meal in all men↓ Palatability after V-meal vs. M-meal⟷ Oxidative stress and inflammation in men with T2D and overweight/obese men after V-meal. This evidence concerns the gene GCG and type 2 diabetes mellitus.