How Much Vitamin D Does My Child Need Every Day?

The amount of vitamin D a person needs every day depends on their age:

  • Infants under 1 year need 400 International Units (IU) of vitamin D. While breastmilk is very healthy for babies, it is a not a good source of vitamin D. In addition, while infant formulas typically have added vitamin D, most infants do not take enough each day to get their full requirement. Most infants should get a supplement containing 400 IUs of vitamin D.
  • Children older than 1 year need 600 IUs of vitamin D.

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Rev. 8/2019. MassGeneral Hospital for Children and Massachusetts General Hospital do not endorse any of the brands listed on this handout. This handout is intended to provide health information so that you can be better informed. It is not a substitute for medical advice and should not be used to treatment of any medical conditions.