Antioxidant Activity of Antioxidant Extract from Black Soybean Skin

The in vitro antioxidant activity of anthocyanin extracts from black soybeans skin is investigated using different antioxidant evaluation systems and compared it with vitamin C. The results show that the anthocyanin extracts possess antioxidant activity in dosage-dependent manner which varies with the type of model systems. The DPPH radial scavenging activity of the samples under investigation is equivalent to 28.76% of the ascorbic acid. The hydroxyl free radical scavenging activity of the samples is equivalent to 47.00% of the ascorbic acid. The total antioxidant capacity of the samples is equivalent to 10.22% of the ascorbic acid.