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Lymphocyte superoxide dismutase (SOD) activity following exposure to 15 μm H2O2 (A) and 25 μm H2O2 (B), and catalase activity following exposure to 15 μm H2O2 (C) and 25 μm H2O2 (D) in subjects prior to (open bars), and following 8 weeks of supplementation with 500 mg day−1 vitamin C (grey bars). Data are presented as means ±s.e.m. * Values significantly different from pre-stimulation, non-supplemented values.
