Fight Back With ORAC ORAC (Oxygen Radical Absorbance Capacity) is a measurement of how well the antioxidants in any given food attack the free radicals in our bodies. Free radicals work against us like rust on an automobile, damaging and aging our cells. Taking in foods rich in antioxidants can help to protect our bodies from the danger of free radicals. The aronia powder used in Oki has an impressive ORAC score, far outshining former "berry favorites" like Acai, Blueberry, Cranberry, Goji, and Mangosteen. Drinkers of Oki can take comfort in knowing that with every ounce, they are arming themselves for the ongoing battle with a broad spectrum of Antioxidant support led by the best berry available.