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Information on the latest vitamin D news and research.

Find out more information on deficiency, supplementation, sun exposure, and how vitamin D relates to your health.

My 11 months old son had blood work done to check his vitamin D. It's low, the number my Dr gave me was 21 and that 40 was normal. Is this a dangerously low number? Like could cause bone growth issues and such? I am upping his supplement from 1 to 2-3 drops (400iu per drop) per Dr recommendation. But just wondered about the level. Also we live in Michigan so I'm sure I'm deficient too and he is breast fed.

Ask the Vitamin D Council

Asked by  Shanski291142600 on June 29, 2016


  • Shanski291142600
     Shanski291142600 on

    See title

    Answered by  Shanski291142600 on

  • IAW
     IAW on

    Here is a great article to read at http://www.vitamindcouncil.org/further-topics/vitamin-d-during-pregnancy-and-breastfeeding/. It explains a lot more than what I can put here.
    If you yourself are not taking at least 4000-6000iu of Vitamin D a day, then you will have very little to no Vitamin D in your breast milk. And yes you too are most likely deficient.
    Your child has an excellent doctor since most do not even check Vitamin D levels. He told you 40ng/ml was normal but we here at the VDC recommend 50ng/ml as the level to try and maintain for you and the baby to be healthy.
    For babies we recommend 1000iu for every 25lbs of body weight. If I were you I would do the 3 drops for 1200iu rather than 2 drops at 800iu.
    As for the level (my opinion) it could have been a lot worse had you not been giving your baby any Vitamin D.

    Answered by  IAW on