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Many plants and their constituents (carotenoids, flavonoids and other phenolic compounds), action to inhibit the free radical by the use of antioxidant activity, helping to a better efficiency of nutrients utilization. The purpose of this study was to investigate the antioxidant activity and phenolic content of five different plants, known for their antioxidant potential. Total phenols were determined by FolinCiocalteumethod, with few modifications. The antioxidant capacity was evaluated by DPPH, ABTS radical-scavenging activity and phosphomolybdenum method. The results showed that the highest antioxidant activity was obtained for walnut leaves in terms of ABTS evaluation and for bilberry leaves by DPPH and phosphomolybdenum methods. In the present study, peppermint, walnut and bilberry leaves proved to have an important antioxidant activity and also a total phenolic content.

Comparison of ABTS, DPPH, Phosphomolybdenum Assays for Estimating Antioxidant Activity and Phenolic Compounds in Five Different Plant Extracts