Not to be confused with mangos, mangosteen is a fruit from Southeast Asia that is incredibly good for you. Praised from China to Calcutta for its health and wellness benefits, the mangosteen fruit promotes skin health, supports healthy blood sugar levels within the normal range, bolsters the immune system, and is an excellent source of vitamin C. Some of its benefits are thanks to nutrients known as xanthones, of which the mangosteen fruit carries at least twenty different kinds. a phytonutrient and antioxidant, xanthones are a formidable rival against free radicals and can help protect your body from oxidative stress and potential health concerns.