Figure 4.

The effects of the RBC storage in the presence of vitC and Trolox on the GSH depletion. The results shown are means ± SD of eight independent experiments (n = 8), where n means number of donors; **p < .01 in the presence of antioxidants at day 20 versus in the absence of antioxidants (control) at the 20 day of storage. The differences between the groups (the mean values of SA (25 μM), Trolox (125 μM) and the combination of SA/Trolox samples) were analyzed by the non-parametric Wilcoxon test.