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Magnesium
What is the Recommended Dietary Allowance for magnesium?
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 (4). The 1999 RDAs for magnesium for adults (4), 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 (NHANES III-1988-91) (5) and the Continuing Survey of Food Intakes of Individuals (1994 CSFII) (4), 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 (4). | ||||
