胃泌素是一種激素，其主要功能是刺激胃粘膜分泌鹽酸，從而抑制胃泌素的形成這種激素也是胃腸道上皮細胞有絲分裂因子胃泌素有兩種生物活性肽形式，G34和G17[由RefSeq提供，2008年7月]
Gastrin is a hormone whose main function is to stimulate secretion of hydrochloric acid by the gastric mucosa, which results in gastrin formation inhibition. This hormone also acts as a mitogenic factor for gastrointestinal epithelial cells. Gastrin has two biologically active peptide forms, G34 and G17. [provided by RefSeq, Jul 2008]