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Definition of Zinc excess

Zinc excess: Too much zinc can cause gastrointestinal irritation (upset stomach), interfere with copper absorption and cause copper deficiency, and (like too little zinc) cause immune deficiency. According to the National Academy of Sciences, the Recommended Dietary Allowance of zinc is 8 milligrams per day for women age 19+ years and 11 milligrams per day for men age 19+ years.

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