Fig. 4From: The role of background diet on the effects of eicosapentaenoic acid and docosahexaenoic acid supplementation in healthy pre-menopausal women: a randomized, cross-over, controlled studyBlood serum and NAF estrogen levels. 17-β-estradiol was measured by radioimmunoassay at baseline and 3 MC after each intervention or washout period. a Average E2 levels ± SE in serum (n = 41). b Average E2 levels ± SE in NAF expressed per μg protein (n = 15). c correlation between serum and NAF E2 concentrations. Points represent the serum E2 value plotted as a function of the corresponding NAF value. a = different from baseline by ANOVA and Tukey's post-hoc test (p < 0.05)Back to article page