GCG and type 2 diabetes mellitus: The present study was aimed to compare the impact of a whey protein-based multi-ingredient nutritional drink (WD), mainly consisting of whey protein, sugar alcohols, and slowly digestible carbohydrates, on postprandial glycaemic, insulinaemic, and plasma active GLP-1 responses in comparison to an Asian common breakfast, which is boiled white rice with chicken (BC) in Thai patients with T2DM.