Intake of mangosteen is a widely used orthodox method for losing weight. Mangosteen helps in the prevention of weight gain, by burning down fat. Xanthones included in the mangosteen peel help to aid weight loss. Mangosteen is now readily available in the supermarkets across the United States. While buying, look for fresh fruits that feel heavy in hand with firm green calyx at the stem end, and bright purple color skin as they indicate fresh arrivals from East Asian orchards.