COLUMBIA, Mo., Nov. 3 (UPI) -- Obese adolescents face an increased risk for vitamin D deficiency because they absorb vitamin D less efficiently than lean teens, U.S. researchers say.
Catherine Peterson of the University of Missouri said the Institute of Medicine recently set new dietary reference intakes for vitamin D -- 600 International Units per day, with a tolerable upper intake of 4,000 IUs, Peterson said.