An evidence-based systematic review of acai (Euterpe oleracea) the acai (ah-sigh-EE) berry is a grape like fruit harvested from acai palm trees, which are native to the Amazon rain forests of South America. Like other berries, acai berries contain antioxidants and fiber. Acai berries are widely touted as a so-called super food, with proponents claiming that they are helpful for a variety of health concerns, including arthritis, weight loss, high cholesterol, erectile dysfunction, skin appearance, detoxification and general health. The acai extracts have a range of poly phenolic components with antioxidant properties, some of those present in greater quantity are orient in, isoorientin and vanillic acid, as well as anthocyanins cyanidin-3-glucoside and cyanidin-3-rutinoside. The presence of these substances is linked mainly to the antioxidant, anti- inflammatory, anti-proliferative and cardio protective activities. However, research on acai berries is limited, and the claims about their health benefits haven't been proved. Acai is usually safe to consume. This article includes written of historical background, active chemical constituents, nutrional values, health benefits plus a compilation of expert opinion, folkloric precedent, side effects, marketed products and dosing.