A blood-borne cytokine that is an appetite suppressant.
A peptide containing 13 amino acids that is produced by cells of the brain and the small intestine. It is released after the consumption of fats and acts both as a neurotransmitter with psychostimulant properties and as a peripheral hormone that stimulates colonic motility, pancreatic and biliary secretion, and the growth of developing gastrointestinal tissues.