PYY (Peptide YY) is a hormone that helps regulate appetite. It's released by cells in the intestines and colon after eating, signaling to your brain that you're full.
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Ghrelin: This is known as the 'hunger hormone' because it stimulates appetite, increases food intake and promotes fat storage.
Cholecystokinin (CCK): This is another hormone that aids digestion and reduces appetite. It acts as an antagonist to ghrelin.
Glucagon-like peptide-1 (GLP-1): A hormone involved in regulating blood sugar levels and slowing down gastric emptying which can lead to feelings of satiety.