Several pediatric societies along with the IOM have recommended infants get 400 IU of vitamin D daily to fulfill their vitamin D needs. The basis of this recommendation is to achieve 25(OH)D levels of 20 ng/ml. However, to date, there is actually limited data on whether 400 IU achieves this level. Furthermore, there is limited data on the 25(OH)D levels achieved by a variety of doses for infants.
A new randomized controlled trial carried out by Professor Sina Gallo and colleagues has attempted to fill these very gaps in research.