Acai is an indigenous berry commonly found in the rain forests of the Amazon. This antioxidant-rich fruit has been heralded for centuries as a healing, immune-stimulating, energy-boosting fruit. An exotic relative of the blueberry and cranberry, research has shown that this antioxidant-rich berry may be able to support in the prevention of diseases associated with oxidative damage, not to mention many other health benefits. Good source of anthocyanin.