This paper reviews the structure, function, and pathophysiology of glucagon-like peptide 1 (GLP-1). It describes the physiology and pathophysiology of the incretin axis, of which GLP-1 is a component, as well as the biosynthesis, secretion, activity, and degradation of this intestinal hormone. Effects of GLP-1 on the endocrine function of the pancreas, cardiovascular system, central nervous system, and on water-electrolyte balance have been also presented.
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