GIP is really an incretin that's secreted while in the proximal compact intestine during the presence of nutrients during the gut. GIP was initially named gastric inhibitory peptide as it was thought to reduce gastric acid secretion; on the other hand, later on experiments shown that its main influence is https://www.google.com/maps/d/u/0/edit?mid=10dO8m1HL2Q7Xg0UHUvDuZb09r_rHftg&usp=sharing