10.22376/ijpbs.2019.10.1.p1-12 Volume 2 Issue 2 2011 (April - June) Ethanolic extract of four medicinal plants lessThan i greaterThan Polygonum microcephalum, Moringa oleifera, Croton tiglium lessThan /i greaterThan and lessThan i greaterThan Gomphrena globosa lessThan /i greaterThan were examined for antioxidant activity, and phenol and flavonoid content. Total phenol and flavonoid content and DPPH radical scavenging activity of the extracts were spectrophotometrically determined. Catechol, Quercetin, and ascorbic acid were taken as standard in case of phenol, flavonoid content and antioxidant activity respectively. The total phenol and total flavonoid content was observed highest in lessThan i greaterThan P. microcephalum lessThan /i greaterThan . The DPPH radical scavenging activity was highest in lessThan i greaterThan M. oleifera lessThan /i greaterThan . There observed a relationship between phenol and flavonoid content but failed to show relationship between phenolic content and antioxidant activity of the ethanol extracts of the plants. L. R. Saikia And Sristisri Upadhyaya antioxidant, phenol, flavonoid, medicinal plants. 383-388