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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.
This indicates a major deficiency of zinc requiring a supplement of at least 15 milligrammes (mg) of zinc per day for an adult. Grade two response: no immediate taste is noticed but, within the ten seconds of the test, a `dry' or `metallic' taste is experienced.