CAT and age-related macular degeneration: Overall, GPx, R-GSSG and GSH transferase activities in RBCs from the AMD group correlated negatively with egg consumption (Rs = −0.22, p < 0.001; Rs = −0.17, p = 0.003; and Rs = −0.13, p = 0.03, respectively), whereas the RBC catalase activity was positively correlated with the amount of egg consumption (Rs = +0.11, p = 0.05).