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was reported to result in normalization of zinc in granulocytes and lymphocytes and improvement in various immune parameters (Prasad et al., 1993). Ethanol tolerance tests indicated a change in ethanol metabolism when dietary zinc intake of postmenopausal women was restricted to 2.6 mg/day (Milne et al., 1987).

Zinc EAR and RDA Summary, Ages 19 Years and Older

EAR for Men

19–30 years

9.4 mg/day of zinc

31–50 years

9.4 mg/day of zinc

51–70 years

9.4 mg/day of zinc

> 70 years

9.4 mg/day of zinc

EAR for Women

19–30 years

6.8 mg/day of zinc

31–50 years

6.8 mg/day of zinc

51–70 years

6.8 mg/day of zinc

> 70 years

6.8 mg/day of zinc

The RDA for zinc is set by using a CV of 10 percent (see Chapter 1) because information is not available on the standard deviation of the requirement. The RDA is defined as equal to the EAR plus twice the CV to cover the needs of 97 to 98 percent of the individuals in the group (therefore, for zinc the RDA is 120 percent of the EAR). The calculated RDA was rounded to the nearest 1 mg.

RDA for Men

19–30 years

11 mg/day of zinc

31–50 years

11 mg/day of zinc

51–70 years

11 mg/day of zinc

> 70 years

11 mg/day of zinc

RDA for Women

19–30 years

8 mg/day of zinc

31–50 years

8 mg/day of zinc

51–70 years

8 mg/day of zinc

> 70 years

8 mg/day of zinc



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