The antioxidant activity of the four types of authentic anthocyanins, determined using the ORAC assay, followed the rank order: P3G (42.4 μmol Trolox/100 mg) > malvidin (41.6 μmol Trolox/100 mg) > C3G (27.8 μmol Trolox/100 mg) > Pt3G (22.9 μmol Trolox/100 mg) (Fig. 3).