10.22376/ijpbs.2019.10.1.p1-12 Volume 1 Issue 2 2010 (April - June)   lessThan i greaterThan In vitro lessThan /i greaterThan antioxidant activities of methanol extract of tuberous root of lessThan i greaterThan Ipomoea digitata lessThan /i greaterThan (Linn.) was investigated. The free radical scavenging activity to evaluate by Hydroxyl radical scavenging activity lessThan b greaterThan , lessThan /b greaterThan FRAP method and Estimation of total phenol. Hydroxyl radical scavenging activity of methanolic extract and reference standard Ascorbate IC lessThan sub greaterThan 50 lessThan /sub greaterThan values was found to be 230 mg/ml and 410 mg/ml. FRAP method of methanolic extract and reference standard Ascorbate IC lessThan sub greaterThan 50 lessThan /sub greaterThan values was found to be 800 mg/ml and 50 mg/ml.The total phenol content of methanolic extract was found to be 7.51mg/g respectively. The above result possess significant antioxidant activity when compare to the above all standard. G. Alagumani Vasagam,A. Kottai Muthu,R. Manavalan Antioxidant, Ipomoea digitata, Hydroxyl radical scavenging activity, FRAP method, Estimation of total phenol. -