GIP and type 2 diabetes mellitus: While some studies show exaggerated glucose-stimulated GIP secretion in people living with T2D [26,[475], [476], [477], [478], [479], [480], [481]], this is not confirmed in other reports [151,193,312,314,[482], [483], [484], [485]], including a large-scale meta-analysis comprising 22 studies [141].