To determine the antioxidant activity of 50 % hydro alcoholic extract of Alpinia galangal and Curcuma zedoaria. DPPH method, ABTS radical scavenging method, Lipid peroxidation (LPO) assay, Nitric oxide radical inhibition activity, Alkaline DMSO method, Total antioxidant capacity by phosphomolybdenum method. 50 % hydro alcoholic extract of Curcuma zedoaria found to possess potent antioxidant activity in Nitric oxide , ABTS and Lipid peroxidation method, total antioxidant capacity, Reducing power ability. 50 % hydro alcoholic extract of Alpinia galangal found to possess more antioxidant activity in DPPH, Alkaline DMSO method and Nitric oxide method reducing power ability. It will be worth to carry out various biological activities against various disease in which free radicals are considered as the dominant role in causing the disease.
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