What It Actually Is
Garcinia cambogia is a small, pumpkin-shaped fruit native to Southeast Asia. Supplements use an extract of the rind, standardized to a percentage of HCA β the compound behind most of its research.
What Research Generally Shows
HCA has been studied for its potential to inhibit citrate lyase, an enzyme involved in converting excess carbohydrates to fat, and for supporting serotonin-related appetite signals. Clinical results are mixed, with some studies showing modest appetite effects and others showing little difference from placebo.
Why It's Dosed At 400mg
400mg sits within the range used in garcinia research, though results across studies vary partly because of differing HCA concentrations used.