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The Recommended Dietary Allowance (RDA) is the average daily dietary intake level that is sufficient to meet the nutrient requirements of nearly all (97-98 percent) individuals in each life-stage and gender group. The RDAs for magnesium for adults, in milligrams
(mg), are:
| Life-Stage |
Men |
Women |
Pregnancy |
Lactation |
| Ages 14 - 18 |
410 mg |
360 mg |
400 mg |
360 mg |
| Ages 19 - 30 |
400 mg |
310 mg |
350 mg |
310 mg |
| Ages 31 + |
420 mg |
320 mg |
360 mg |
320 mg |
| Results of two national
surveys, the National Health and Nutrition Examination Survey and the Continuing Survey of Food Intakes of
Individuals, indicated that the diets of most adult men and women do not provide the recommended amounts of
magnesium. The surveys also suggested that adults age 70 and over eat less magnesium than younger
adults, and that non-Hispanic black subjects consumed less magnesium than either non-Hispanic white or Hispanic
subjects. |
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