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Kids and Vitamin D Deficiency. ââââââRosemont, IL, October 17, 2012 â A startling increase in the frequency of severe vitamin D deficiency is being reported in the U.S. and other countries. This severe deficiency can have a devastating impact on a childâs bone strength, the United States Bone and Joint Initiative (USBJI) says.
Severe vitamin D deficiency can cause rickets in children and osteomalacia (âsoftâ bones) in adults. Yet, vitamin D is more than a vitamin. It really is a prohormone, a substance that the body converts to a hormone. The skin makes vitamin D after exposure to sunlight. We also absorb vitamin D from certain foods, such as dairy products and certain oily fish, such as salmon, mackerel, and sardines. Vitamin D has its effects by binding to a protein (called the vitamin D receptor).