It is a popular weight loss supplement, that blocks your body's ability to make fat and it puts the brakes on your appetite. The active ingredient in the fruit's rind, hydroxy citric acid, or HCA, has boosted fat-burning and cut back appetite in studies. It appears to block an enzyme called citrate lyase, which your body uses to make fat. Works by making you feel full, reducing your appetite, and affecting metabolism. Garcinia Cambogia may make it easier for your body to use glucose, the sugar your cells need for energy. However, if you're taking garcinia cambogia along with a medication to control your blood sugar, your glucose could get dangerously low. Garcinia Cambogia can also improve cholesterol levels, lowering triglycerides and LDL (the "bad" cholesterol) and raising HDL (the "good" cholesterol). But you shouldn't use it if you're already on a prescription for your cholesterol.