Garcinia is a plant genus of the family Clusiaceae native to Asia, Australia, tropical and southern Africa, and Polynesia. The number of species is highly disputed, with various sources recognizing between 50 and about 300 taxa as specifically valid. Commonly, the plants in this genus are called saptrees, mangosteens , garcinias or, ambiguously, "monkey fruit".

Hydroxycitric acid, the active ingredient in the herbal compound Garcinia cambogia, competitively inhibits the extramitochondrial enzyme adenosine triphosphate-citrate (pro-3S)-lyase. G cambogia is claimed to lower body weight and reduce fat mass in humans.

Garcinia species are evergreen trees and shrubs, dioecious and in several cases apomictic. Many species are threatened due to habitat destruction, and at least G. cadelliana from South Andaman Island is almost or even completely extinct already.
Many species of Garcinia have fruit with edible arils, but most are eaten locally; some species' fruits are highly esteemed in one region.