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Interpretation Provides information to assist in interpretation of the test results. Normal serum zinc is 0.66 to 1.10 mcg/mL. Burn patients with acrodermatitis may have zinc as low as 0.4 mcg/mL; these patients respond quickly to zinc supplementation.
How Much Is Too Much. The RDI for zinc is 11 mg per day for adult men and 9 mg per day for adult women (except pregnant/lactating women, in which case it's 11 and 12 mg per day, respectively). The upper limit for adult men and women is 40 mg/day before it becomes toxic (including pregnant/lactating women).or men, zinc is particularly interesting since it has a direct link to the body's natural testosterone production. This hormone is what makes a man a man in everything from musculature and facial hair to performance in the bedroom.