The purple mangosteen (Garcinia mangostana), colloquial known simply as mangosteen, is a tropical evergreen tree believed to have originated in the Sunda Islands and the Moluccas of Indonesia. The tree grows from 7 to 25 m (20-80 ft) tall. The fruit of the mangosteen is sweet, tangy juicy, and somewhat fibrous with an inedible, deep reddish purple-coloured rind. The exocarp of the mangosteen fruit is one of the richest sources for bioactive Polyphenols (secondary plant substances). The valuable specific Polyphenols found in mangosteen fruits can significantly improve health. With more over 1200 Polyphenols identified in nature, so far, 43 specific Polyphenols are defined in the mangosteen fruit.