Magnesium RDI

Magnesium has a recommended daily intake which is different for the various age groups and genders.

Find your recommended daily intake of magnesium below:

  • Infants (0-6 months) - 30mg
  • Infants (7-12 months) - 75mg
  • Children (1-3 years) - 80mg
  • Children (4-8 years) - 130mg
  • Children (9-13 years) - 240mg
  • Boys (14-18 years) - 410mg
  • Girls (14-18 years) - 360mg
  • Men (19-30 years) - 400mg
  • Women (19-50 years) - 310mg
  • Men (31 years and older) - 420mg
  • Women (51 years and older) - 320mg
  • Pregnant women (<18 years) - 400mg
  • Pregnant women (18-30 years) - 350mg
  • Pregnant women (31-50 years) - 360mg
  • Lactating women (<18 years) - 360mg
  • Lactating women (18-30 years) - 310mg
  • Lactating women (31-50 years) - 320mg
There is an established recommended daily intake (RDI) and tolerable upper limit for magnensium

Tolerable Upper Limit

There is also a tolerable upper limit for magnesium - this is the maximum that can be safely taken of this mineral before it produces serious and toxic side effects:

  • Infants (0- 12 months) - not established*
  • Children (1-3 years) - 65mg
  • Children (4-8 years) - 110mg
  • Children (9-18 years) - 350mg
  • Adults (>19 years) - 350mg
  • Pregnant & lactating women (all ages) - 350mg

* The tolerable upper limit for magnesium for infants aged 0-12 months has not yet been determined due to a lack of data about the adverse effects in this age group and a concern about the lack of ability of the body of infants to handle excess amounts. The only source of magnesium intake should be from food (breast milk and/or baby formula) to prevent high levels of intake and possible adverse effects.

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