Leptin and ghrelin sound like names from a movie. But they are hormones that regulate your feelings of hunger and satiety.⁣⁣𝗟𝗲𝗽𝘁𝗶𝗻 lets you know when it is time to stop eating. It is a hormone released by your fat cells that tells your brain when your body has had enough fuel and can start burning fat to create energy. It is a longer-term energy balancing hormone.⁣⁣𝗚𝗵𝗿𝗲𝗹𝗶𝗻, on the other hand, is released by your stomach when it is empty, signalling your brain that it is time to eat.