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EAR (μg/d)a

RDA (μg/d)b

 

Male

Female

Male

Female

AI (μg/d)c

 

200

 

220

260

260

340

340

 

340

340

440

440

 

540

540

700

700

 

685

685

890

890

 

700

700

900

900

 

700

700

900

900

 

 

785

 

1,000

 

 

800

 

1,000

 

 

985

 

1,300

 

 

1,000

 

1,300

 

Zinc functions through the catalysis of various enzymes, the maintenance of the structural integrity of proteins, and the regulation of gene expression. Overt human zinc deficiency is rare, and the symptoms of a mild deficiency are diverse due to zinc’s ubiquitous involvement in metabolic processes. Factorial analysis of zinc losses and requirements for growth, as well as fractional absorption, were used to set an EAR. The RDA for zinc is set at 11 mg/day for men and 8 mg/day for women.



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