The purple mangosteen, colloquially known simply as mangosteen, is a tropical evergreen tree believed to have originated in the Sunda Islands and the Moluccas of Indonesia. Mangosteen is widely available in juice form. Mangosteen juice products typically include the fruit, rind and pulp of the fruit, which contains compounds called xanthones. Although some research indicate that xanthones may offer certain benefits, the health effects of mangosteen have yet to be extensively studied. Despite claims that mangosteen can help fight cancer, there's no evidence to support the use of mangosteen in cancer treatment or prevention. In a 2006 report published in the Journal of the Society for Integrative Oncology, scientists warn that cancer patients should use caution before consuming mangosteen products. Mangosteen can potentially interact with cancer treatments and also affect blood sugar levels, the report's authors noted.