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Effect of supplementation with SeMet or SY on plasma selenium levels in adult men. Subjects were randomized to placebo (n=18), 200 µg/d SY (n=16), 285 µg/d SY (n=15) or 200 µg/d SeMet (n=20). Supplementation continued for 9 months followed by a 3 month washout. Plasma total selenium levels were assessed by atomic absorption spectrophotometry. Symbols and bars represent mean and standard error values, respectively.
