The acai berry is an inch-long reddish, purple fruit. It comes from the acai palm tree (Euterpe oleracea), which is native to Central and South America. Research on the acai berry has focused on its possible antioxidant activity. Theoretically, that activity may help prevent diseases caused by oxidative stress. Acai contains several substances called anthocyanins and flavonoids. The word anthocyanin comes from two Greek words meaning "plant" and "blue." Anthocyanins are responsible for the red, purple, and blue hues in many fruits, vegetables, and flowers. Foods that are richest in anthocyanins -- such as blueberries, red grapes, red wine, and acai -- are very strongly colored, ranging from deep purple to black. Anthocyanins and flavonoids are powerful antioxidants that help defend the body against life's stressors. They also play a role in the body's cell protection system. Free radicals are harmful byproducts produced by the body. Eating a diet rich in antioxidants may interfere with aging and the disease process by neutralizing free radicals.By lessening the destructive power of free radicals, antioxidants may help reduce the risk of many diseases. Scientists are learning more about the functional power of superfoods, such as the acai berry. Although acai is touted in some weight loss products, few studies have tested the benefit of acai in promoting weight loss.
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