Peptide YY

Definition:

Peptide YY (Full name pancreatic peptide YY) is a hormone released by cells in the small intestine. It is released during digestion, and binds to the brain to suppress appetite. It also acts in the stomach and intestine to slow the movement of food through the digestive tract.

Low peptide YY levels are often seen in those with obesity,^[1] meaning that appetite levels aren’t suppressed as much in the hours after eating. This can lead to overeating, making it harder to manage weight. There has been some research into using peptide YY as a medication for obesity, with the aim of reducing appetite. The research is still ongoing.