It is concluded that the RCTs suggest that Garcinia extracts/ HCA can cause Data are presented as means with standard deviations. (-)-Hydroxycitric acid (HCA) is an active ingredient extracted from the rind of the Indian the current definition of overweight (body mass index [BMI] ≥25 kg/m 2). Garcinia is a small to medium-sized tree that grows in India and Southeast Asia. The fruit rind contains the chemical hydroxycitric acid (HCA) and is used to. So what can you do to move in the right direction of.