Mark is an investor of an ever-growing portfolio of businesses, including ownership of the Dallas Mavericks, on the Forbes' list of the most valuable franchises in sports.
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. This could theoretically lead to reduced appetite and cravings (2).
There are actually a whole bunch of studies in rats showing that Garcinia Cambogia consistently leads to significant weight loss (3, 4, 5, 6).