Your body is designed to naturally regulate how much you eat and the energy you burn. Part of how this occurs is through the release of the hormones ghrelin and leptin. When you eat a sugar dessert, for instance, your body increases production of leptin, which regulates your appetite and fat storage. Ghrelin, on the other hand, is known as the "hunger hormone" because people given the hormone in a study on grehlin became so ravenous, they ate markedly more than their usual food intake. Ghrelin appears to act on your brain's "pleasure centers," driving you to reach for another slice of cheesecake simply because you remember how good the first one tasted and made you feel (at least in that...
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