Vitamin D deficiency: a worldwide problem with health consequences.
Holick MF, Chen TC.
Am J Clin Nutr. 2008 Apr;87(4):1080S-6S. Review.
PMID: 18400738
A reevaluation needs to take place of what the adequate intakes of vitamin D should be for children and adults. The literature over the past decade suggests that the Institute of Medicine recommendations in 1997 (83) are inadequate, and some experts including us suggest that both children and adults should take ≥800-1000 IU vitamin D/d from dietary and supplemental sources (4, 9, 77) when sunlight is unable to provide it. This recommendation, however, has not yet been embraced either by official government or pediatric organizations in the United States, Canada, or Europe for either children or adults.