Vitamin D nutrition has become one of the most widely discussed issues in modern medicine. Ongoing research has challenged traditional views of the role of vitamin D as limited to bone health. A large number of recent studies have raised compelling and as yet unanswered questions about optimal dietary intakes and outcomes related to vitamin D. In infants and small children, it is well recognized that a severe deficiency of vitamin D can lead to rickets and related serious health problems including hypocalcemia, but little is known about other outcomes that are not related to bone or calcium.
Abrams SA. Targeting Dietary Vitamin D Intakes and Plasma 25-Hydroxyvitamin D in Healthy Infants. JAMA. 2013;309(17):1830–1831. doi:10.1001/jama.2013.4149