GLP-1 (glucagon-like peptide-1) is a hormone released by the gut after you eat. It signals fullness to the brain, slows how quickly the stomach empties, and helps regulate blood sugar and insulin.
Medications called GLP-1 receptor agonists — such as semaglutide — mimic this hormone and are prescribed for type 2 diabetes (link type 2 diabetes) and chronic weight management. See GLP-1 medications explained for how they work and who they're for. They are prescription medicines, not a casual quick fix.