Acai Antioxidant Juice… it could be one of the best sources of antioxidants on the market today.The antioxidants in the Açaí fruit is five times higher than that of Gingko biloba, the popular "brain boosting" herbal supplement that is known for its antioxidant properties. Research on Acai has shown that these antioxidants are known to fight and regulate cholesterol levels in the body.