Garcinia Cambogia is a natural weight loss supplement extracted from a fruit from which its name is derived. It has been found to contain HCA (hydroxycitric acid), which is believed to help block fat and suppress appetite. HCA may prevent the conversion of unused or stored sugar into fat. It may also curb appetite by regulating the levels of serotonin in the body. Serotonin is a hormone that affects one’s mood and appetite. When one has high levels of it, they tend to have a feeling of cheerfulness and satiety for a longer period of time.