GIP is an incretin which is secreted within the proximal small intestine inside the presence of nutrients during the gut. GIP was initial named gastric inhibitory peptide since it was thought to decrease gastric acid secretion; however, later studies shown that its principal impact is stimulating insulin secretion in reaction https://docs.google.com/spreadsheets/d/1KSPQ92pv1hSsTHqspwuCrx81CIhbKoty/edit?usp=sharing&ouid=102904176240392372309&rtpof=true&sd=true