Fewer children at risk for deficient vitamin D

Under new guidelines from the Institute of Medicine, the estimated number of children who are at risk for having insufficient or deficient levels of vitamin D is drastically reduced from previous estimates, according to a study. The study found that under the new guidelines, 10.3 percent of children ages 6 to 18 are at risk of inadequate or deficient vitamin D levels, which translates to an estimated 5.5 million children.