GIP is really an incretin that's secreted within the proximal small intestine inside the presence of nutrients while in the intestine. GIP was initially named gastric inhibitory peptide since it was assumed to lower gastric acid secretion; having said that, later research demonstrated that its primary result is stimulating insulin https://docs.google.com/forms/d/e/1FAIpQLSfgwd8YLJGrxOY5kGjkDJEePuqBtCwPJle2UHMfwSOot7eRcQ/viewform?usp=sf_link