This tropical fruit native to Malaysia and Indonesia is known for its sweet flavor, which is similar to a mixture of grape and apple. This fruit has been used for many years as a medicinal treatment for diarrhea, skin infection and wounds in Southeast Asia. Scientists have discovered that this fruit contains a class of naturally occurring compounds known as xanthones, which demonstrate potent antioxidant, anti-inflammatory, antibacterial and neuroprotective (protecting against nerve damage) effects, as well as beneficial effects against cardiovascular diseases. What is this fruit?