The first 2 years: Every breast-fed infants is recommended to take 400 iu of vitamin d supplement. The vitamin d intake in young toddlers in their 2nd year of life can be suboptimal especially if they are not offered enough dairy products. For those, supplemental vitamin d in the form of drops, would be advisable.
Answered 10/3/2011
6.3k views
See below: Since we cannot store vitamin d. Once it is established that we must take it then it is forever until we start taking pills.
Answered 2/25/2016
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