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Which nutrient can impair the immune system if taken in large doses? Vitamin A, zinc, iron, copper, or vitamin D
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  • June 22, 2016
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Zinc, excess intake of zinc can cause abdominal pain, nausea, vomiting and diarrhea. Also, long term intake of zinc can reduce iron function, red blood cell, microcytosis, neutropenia and reduces immune function

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