Appetite Regulation

Appetite regulation is the body’s built-in system that controls when you feel hungry and when you feel full. It involves signals from your stomach, fat cells, and brain working together — hormones like ghrelin tell you to eat, while leptin and GLP-1 tell you to stop.

Appetite regulation is a complex neuroendocrine process integrating peripheral signals (ghrelin from the stomach, leptin from adipose tissue, GLP-1 and PYY from the gut) with central processing in the hypothalamus, particularly the arcuate nucleus. The melanocortin system, involving POMC/CART (anorexigenic) and NPY/AgRP (orexigenic) neurons, serves as the primary central integrator of energy homeostasis.

Many weight management medications, including GLP-1 receptor agonists like semaglutide and tirzepatide, work by targeting appetite regulation pathways. Understanding this system helps patients at Accord Medical appreciate how these treatments produce results and why they are more effective than willpower alone.