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North Eastern India is a very diverse area because of its unique types of flora as well as from different tradition and community. Terminalia arjuna, Cheilocostus speciosus and Clerodendrum glandulosum are three important wild medicinal plants of family Combretaceae, Costaceae and Lamiaceae respectively, used by most of the people of Assam as medicine to cure certain illness like cardiovascular diseases, jaundice, high blood pressure etc. The aim of the present study is to evaluate the antioxidant activity of these three plant samples. Cold maceration method in methanol was applied in the preparation of extract and antioxidant activity was determined using DPPH free radical scavenging method. IC50 (inhibition concentration) value was calculated for all sample. For comparison of total antioxidant activity pure ascorbic acid was taken as standard. The study shows the highest antioxidant activity by T. arjuna with IC50 value at 12.508 μg/ml, while C. speciosus and C. glandulosum shows considerably lower antioxidant activity with IC 50 value at 300.532 μg/ml and 205.086 μg/ml.

Evaluation of Antioxidant Activity of the Selected frequently used Traditional Wild Medicinal Plants from Lakhimpur, Assam (India)