The activity of CuZnSOD (A), MnSOD (B), CAT (C), and GSH-Px (D) in tumor-associated adipose tissue of normal-weight (black) and overweight/obese (gray) women with benign and malignant breast tumors. Enzyme activity is expressed in absolute units in U mg−1 protein (A, B, C) and nM NADPH min−1mg−1 protein (D). Bars represent the mean ± S.E.M. *Compared to respective benign counterpart, *p < .05, **p < .01.