Acai berry is rich in antioxidants that prevent the free radicals from causing damage to the skin, thus preventing early ageing. “Acai’s ORAC level (Oxygen Radical Absorbance Capacity) is over 3,500, which is hundreds of times higher than your average fruits like apples and bananas,” says celebrity nutritionist Lindsey Duncan. Many beauty products use acai oil (high in antioxidant content, of course) as one of its main ingredients.