How Much Magnesium Do Adults Need?

The National Institutes of Health, Office of Dietary Supplements, lists the Recommended Dietary Allowance (RDA) for adults for magnesium as follows:

Recommended Dietary Allowance (RDA)¹
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

According to a recent national survey, 80% of Americans don't get enough magnesium from their diet alone.²

Adults with certain illnesses, chronic conditions, or taking medicines that are associated with magnesium depletion may be at particular risk of developing a deficiency.

How common is magnesium deficiency?

References:

Facts About Dietary Supplements: Magnesium. Office of Dietary Supplements, National Institutes of Health Web site.
Available at: http://ods.od.nih.gov/factsheets/cc/magn.html.
Accessed August 5, 2004.
Data on file. Purdue Products L.P.

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