Mineral
Magnesium
Magnesium is found naturally in many foods and is added to some fortified foods. The NIH Office of Dietary Supplements publishes a recommended amount of Men 400–420 mg; Women 310–320 mg, and an upper limit of Adults 350 mg. Read 2026-08-09.
What is Magnesium?
NIH's fact sheet for Magnesium carries no line we quote here under this heading.
How much Magnesium does NIH publish?
| Life stage | Amount | Printed table |
|---|---|---|
| Birth to 6 months | 30 mg | Recommended Amount |
| Breastfeeding teens | 360 mg | Recommended Amount |
| Breastfeeding women | 310–320 mg | Recommended Amount |
| Children 1–3 years | 80 mg | Recommended Amount |
| Children 4–8 years | 130 mg | Recommended Amount |
| Children 9–13 years | 240 mg | Recommended Amount |
| Infants 7–12 months | 75 mg | Recommended Amount |
| Men | 400–420 mg | Recommended Amount |
| Pregnant teens | 400 mg | Recommended Amount |
| Pregnant women | 350–360 mg | Recommended Amount |
| Teen boys 14–18 years | 410 mg | Recommended Amount |
| Teen girls 14–18 years | 360 mg | Recommended Amount |
| Women | 310–320 mg | Recommended Amount |
| Adults | 350 mg | Upper Limit |
| Birth to 12 months | Not established | Upper Limit |
| Children 1–3 years | 65 mg | Upper Limit |
| Children 4–8 years | 110 mg | Upper Limit |
| Children 9–18 years | 350 mg | Upper Limit |
Children and teens
Rows for children and teens appear in the table above, in NIH's own wording.
Pregnancy and breastfeeding
Rows for pregnant and breastfeeding life stages appear in the table above, in NIH's own wording.
What upper limit does NIH publish for Magnesium?
- Adults: 350 mg
- Birth to 12 months: Not established
- Children 1–3 years: 65 mg
- Children 4–8 years: 110 mg
- Children 9–18 years: 350 mg
Which foods contain Magnesium?
"Magnesium is found naturally in many foods and is added to some fortified foods."
Where these numbers come from
Every quote and every amount on this page comes from National Institutes of Health, Office of Dietary Supplements. Magnesium — Consumer. Public domain (U.S. Government work). LAFYA read the sheet 2026-08-09.
Read the full fact sheet at NIH Office of Dietary SupplementsWhat LAFYA does not say about Magnesium
LAFYA publishes no claim that magnesium does anything in the body, because we cannot prove one.