Methanolic extracts of C. linum exhibited potent antioxidant activity in a dose-dependent manner, by DPPH radical quenching assay. The methanolic extract of C. linum contains a high amount of phenolic compounds, exhibited the greatest antioxidant activity (as ascorbic acid equivalents)
in this study. The higher scavenging activity of C. linum may be attributed to hydroxyl groups in the phenolic compounds, which might provide the essential component.