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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.
1 The U.S. Recommended Daily Allowance (RDA) is 15 milligrams of zinc. 2  Recently, zinc is found to enhance eyesight, preventing the onset of macular degeneration. 3  Zinc occurs naturally in the earth, air and foods you eat; it is the second most common trace metal, after iron, naturally found in the body.