GLP-1 (Glucagon-Like Peptide-1) is a hormone that plays a crucial role in regulating several functions in the body, particularly in relation to glucose metabolism and appetite regulation. It's a member of the incretin family of hormones, which are secreted in the gastrointestinal tract after eating. GLP-1 has gained attention recently, especially due to its effects on weight loss, blood sugar regulation, and its use in diabetes management.