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What is the highest dose of magnesium that I can take safely?

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Excessive use of magnesium supplements can be toxic. In addition to what you get from food, the highest dose you should take of magnesium supplements is:

These doses are the highest somebody should add to his or her diet. Many people ingest significant quantities of magnesium through the foods they eat.

  • 65 mg/day for children ages 1-3
  • 110 mg/day for children ages 4-8
  • 350 mg/day for adults and children ages 9 and up

From: Magnesium WebMD Medical Reference

SOURCES: Longe, J., ed. , second edition, 2004. Office of Dietary Supplements: "Dietary Supplement Fact Sheet: Magnesium."

The Gale Encyclopedia of Alternative Medicine

UpToDate: "Causes of hypomagnesemia."

Reviewed by Carmen Patrick Mohan on June 07, 2017

SOURCES: Longe, J., ed. , second edition, 2004. Office of Dietary Supplements: "Dietary Supplement Fact Sheet: Magnesium."

The Gale Encyclopedia of Alternative Medicine

UpToDate: "Causes of hypomagnesemia."

Reviewed by Carmen Patrick Mohan on June 07, 2017

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Can I get magnesium from foods?

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