Fig. 4. Plasma TAOC (total antioxidant capacity) measured by chemiluminescence (•, arbitrary units, see Methods) or by the ABTS method (, units: IC₅₀/10, see Methods). Means ± SEM, n = 20. For each TAOC assay, different letters indicate that the means are significantly different (p < 0.05), as assessed by ANOVA for paired values followed by the post hoc Newman-Keuls’ test.