Fig. 3From: Effect of consuming a grape seed supplement with abundant phenolic compounds on the oxidative status of healthy human volunteersUrine redox potential (mV) of 46 volunteers who ate eight biscuits without phenols on day-1 and eight biscuits supplemented with a red grape seed extract (250 mg polyphenols) on day-2. Values indicate means ± standard errors. * p < 0.001 by Student’s paired t-testBack to article page