Where are the potent xanthones primarily concentrated in the mangosteen fruit?
Answer
The thick, inedible purple rind (pericarp)
The most celebrated aspect of the mangosteen, responsible for much of its reputation in functional food research, is its rich concentration of unique antioxidants known as xanthones. These powerful plant compounds are not found predominantly in the edible flesh that consumers typically eat for flavor. Instead, they are highly concentrated within the thick, protective, and typically inedible outer layer known as the purple rind, or pericarp. Understanding this location is crucial for consumers aiming to maximize the intake of these specific bioactive compounds, often necessitating the use of whole-fruit extracts or juices that incorporate this part.

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