The acai berry is a grape-like fruit harvested from acai palms in the rainforests of South America. Acai berries are a good source of antioxidants, fiber and heart-healthy fats. Some manufacturers claim that products made from acai berries can help you lose weight, lower cholesterol and gain energy. Research on acai berries is limited, however, and these claims are unproven. If you’d like to try acai berry products, check local health food or gourmet stores for acai berry juice or other acai berry products. Fresh acai berries spoil too quickly to be distributed widely.