(CNN) - Vitamin D and calcium have long been touted as the best nutrients for strong bones, muscles and teeth. Recent studies have shown that vitamin D could be used to fight cancer, heart ailments, autoimmune diseases, even diabetes.
But too much vitamin D can damage the kidneys and the heart. So what's the right balance?
After reviewing nearly 1,000 published studies on vitamin D and calcium, the Institute of Medicine on Tuesday recommended that most Americans and Canadians up to age 70, who are not pregnant, need no more than 600 international units (IUs) of vitamin D per day to maintain good health. People over age 70 may need as much as 800 IUs.
Today on American Morning, John Roberts and Kiran Chetry talk to Elizabeth Cohen, senior medical correspondent, about the latest recommendations.
Read more here.