Cover Image

PAPERBACK
$59.95



View/Hide Left Panel

reported that the median weight gain of 7,002 women who had good pregnancy outcomes was 16 kg. No consistent relationship between maternal age and weight gain was observed in six studies of U.S. women (IOM, 1990). Therefore, 16 kg is added to the reference weight for adolescent girls and adult women for extrapolation. The AI for pregnant adolescent girls and women is 2 mg/day after rounding. This value is similar to dietary manganese intake data obtained from the Total Diet Study (Appendix Table E-6).

Manganese AI Summary, Pregnancy

AI for Pregnancy

14–18 years

2 mg/day of manganese

19–30 years

2 mg/day of manganese

31–50 years

2 mg/day of manganese

Lactation

Method Used to Set the Adequate Intake

There are no data available that directly assess the manganese requirement in lactating women. Approximately 3 μg/day of manganese is secreted in human milk. Even though the requirement during lactation does not appear to be greater than the requirement for nonlactating women, the median intake of 2.56 mg/day of manganese is greater during lactation (Appendix Table E-6). Because a manganese deficiency has not been observed in North American lactating women, the AI is based on the median intake and rounding to 2.6 mg/day.

Manganese AI Summary, Lactation

AI for Lactation

14–18 years

2.6 mg/day of manganese

19–30 years

2.6 mg/day of manganese

31–50 years

2.6 mg/day of manganese

INTAKE OF MANGANESE

Food Sources

Based on the Total Diet Study, grain products contributed 37 percent of dietary manganese, while beverages (tea) and vegetables



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement