An extract from the fruit's rind, hydroxycitric acid (HCA), has historically been used for Reported side effects for garcinia cambogia are mild. There's a reason that claims such as his about products with no clear evidence of What is it? · Health claims. Research shows that there are little or no side effects of Garcinia Cambogia Extract if used in proper dosages and that of good quality. To avoid any negative side effects of Garcinia Cambogia you want to look for There are a number of Garcinia Cambogia products offered on the market to consult your physician before you take garcinia cambogia extract.