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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.
Vitamin D is actually the most toxic of all the vitamins. As little as ten times required amounts -- 50 mcg -- can be toxic to children. Symptoms of overdose include diarrhea, nausea, and headache. The most serious complication is the elevated blood calcium levels that too much vitamin D can cause. This condition can lead to calcium deposits in the kidneys, heart, and other tissues, causing irreversible damage.