The information found here is based on the recommendations from the Institute of Medicine.

Magnesium Recommendations,(mg)

INFANTSMagnesium (mg)
0 to 6 Months30
0 to 12 Months 75
CHILDRENMagnesium (mg)
1 to 3 Years80
4 to 8 Years130
MALESMagnesium (mg)
9 to 13 Years240
14 to 18 Years410
19 to 30 Years400
31 to 50 Years420
51 to 70 Years420
Over 70 Years420
FEMALESMagnesium (mg)
9 to 13 Years240
14 to 18 Years360
19 to 30 Years310
31 to 50 Years320
51 to 70 Years320
Over 70 Years320
Pregnancy400
Lactation310