Gandhi followed a fruit-only diet from time to time, but eventually gave it up due it being unsustainable. Listverse Staff Listverse is a place for explorers. The reality of the situation is that the weight-loss would have happened anyway with this diet, grapefruit not included. It is based on the presumed ancient diet of wild plants and animals that various human species habitually consumed during the Paleolithic—a period of about 2. There are hundreds of these quick-fix diets out there, from the grapefruit diet to the detox diet to the "caveman" diet.
The Worst Diets Ever
The skin of the fruit contains a substance called Hydroxycitric Acid (HCA), which is the active ingredient. Does Garcinia Cambogia Actually Work. Woman Smiling and Holding a Supplement I managed to find several research studies on Garcinia Cambogia, in both animals and humans. According to some studies in rats, it can inhibit a fat producing enzyme called Citrate Lyase, making it more difficult for the body to produce fat out of carbohydrates (1).
Other rat studies show increased levels of the neurotransmitter serotonin.