Dietary Reference Intakes for Magnesium in United States (per day)

Males EAR RDA AI UL
0-6 months - - 30 mg -
7-12 months - - 75 mg -
1-3 years 65 mg 80 mg - 65 mg
4-8 years 110 mg 130 mg - 110 mg
9-13 years 200 mg 240 mg - 350 mg
14-18 years 340 mg 410 mg - 350 mg
19-30 years 330 mg 400 mg - 350 mg
31-50 years 350 mg 420 mg - 350 mg
50-70 years 350 mg 420 mg - 350 mg
70 years and older 350 mg 420 mg - 350 mg
Females EAR RDA AI UL
0-6 months - - 30 mg -
7-12 months - - 75 mg -
1-3 years 65 mg 80 mg - 65 mg
4-8 years 110 mg 130 mg - 110 mg
9-13 years 200 mg 240 mg - 350 mg
14-18 years 300 mg 360 mg - 350 mg
19-30 years 255 mg 310 mg - 350 mg
31-50 years 265 mg 320 mg - 350 mg
50-70 years 265 mg 320 mg - 350 mg
70 years and older 265 mg 320 mg - 350 mg
Pregnancy EAR RDA AI UL
less than 18 years 335 mg 400 mg - 350 mg
19-30 years 290 mg 350 mg - 350 mg
31-50 years 300 mg 360 mg - 350 mg
Lactation EAR RDA AI UL
less than 18 years 300 mg 360 mg - 350 mg
19-30 years 255 mg 310 mg - 350 mg
31-50 years 265 mg 320 mg - 350 mg
Reference: Dietary Reference Intakes (DRIs): Recommended Intakes for Individuals, Food and Nutrition Board, Institute of Medicine, National Academies, 2010