We first have to understand why we feel hungry. There is a hormone called Ghrelin found in the stomach. Small amounts are also released in the small intestine, brain, and pancreas. It is known as the hunger hormone with its main function to stimulate the appetite. It also increases food intake and fat storage. When there is a high level of this hormone present in the brain, the hypothalamus releases hormones that let you feel hungry. When you are satisfied, the digestive system releases another hormone called leptin. Leptin travels through the blood and when it reaches the brain, other hormones are released to let us know we had an elegant sufficiency.