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The macerated methanolic extract of P. vera L., A. strigosa and I. paraguariensis A. St.-Hil. were used for evaluating their antioxidant activity. The results of present study showed that the IC50 value for Pistacia vera L., Anchusa strigosa and Llex paraguariensis A. St.-Hil. extracts were 5.85 ± 0.11, 43.75 ± 1.05 and 8.98 ± 0.65μg/ml respectively compared to 1.48 ± 0.05 μg/ml of ascorbic acid against DPPH radical. The IC50 values for β-carotene bleaching (BCB) assay for P. vera L., A. strigosa and I. paraguariensis A. St.-Hil. extracts were 390.1 ± 7.5, 425.8 ± 6.5 and 410.2 ± 9.0 μg/ml respectively compared to 9.5 ± 0.4 μg/ml of rutin. The results of β-carotene bleaching (BCB) assay showed that the plant extract exhibits weak activity compared to rutin. In conclusion, the present study indicates that these plants and their phytochemical constituents can be exploited in future extensively for controlling oxidative stress and ailments. keywords: Natural Products, Redox properties, Oxidative stress, Antioxidant potential, DPPH radical scavenging activity, β-carotene bleaching assay.

Antioxidant Potential of Pistacia Vera L. Fruit Hull, Anchusa Strigosa Flowers and Ilex Paraguariensis A. St.-Hil. leaves Extract