['To assess the antioxidative effect of procyanidins from pine bark on free radical damage.', 'Hemolysis, Malonaldehyde(MDA) level of mice liver homogenates, the conformation changes of irradiated plasmid PUC18 were used as indexes.', 'Procyanidins could reduce the hemolysis degree of human RBC induced by H2O2 significantly(P < 0.01), reduce the MDA level of mice liver homogenate initiated by VitC/Fe2+ remarkably(P < 0.01), and reduce the degree of single-strain break of plamid PUC18 induced by 60Co gamma significantly(P < 0.01).'] Do [ The antioxidative effect of procyanidins from pine bark in vitro ]?