Recommended dietary allowances for Magnesium

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  • For U.S. residents 
Life Stage Group Magnesium (mg/day)
RDA UL*
0-6 months 30 ND*
6-12 months 75 ND*
1-3 y 80 65
4-8 y 130 110
Male Female
9-13 y 240 240 350
14-18 y 410 360 350
19-30 y 400 310 350
31-50 y 420 320 350
51-70 y 420 320 350
>70 420 320 350
Pregnancy
<18 y 400 350
19-30 y 350 350
31-50 y 350 350
Lactating
<18 y 360 350
19-30 y 310 350
31-50 y 320 350

*Abbreviations      

UL  =   Tolerable upper intake level ( the UL for magnesium represents intake from a supplement or pharmacological agent only;  not the intake from food and water)      

ND =   Not determinable due to lack of data