A recent vitamin D report from the Institute of Medicine forced a lot of people to reconsider the essential nutrient. Here's a look at what the expert panel said, and why it reached its controversial conclusions.
SBlt How much vitamin D did the experts say is necessary?
For most children, teens and adults, a daily dose of 400 international units (IUs) of the vitamin is sufficient, and 600 IUs are recommended. Seniors older than 70 should ideally receive 800 IUs of vitamin D a day, the panel determined.