vitamin d

What you need to know about vitamin D

You may have seen supplements containing vitamin D at your local convenience stores or been tested for deficiency by your doctor. But what is vitamin D, and why do we need it?

Vitamin D guidelines edge upwards, but most Americans getting enough: report

Despite calls by some experts that Americans take in much more vitamin D, a new report from the Institute of Medicine finds that most people are getting enough of the nutrient each day.The IOM did bump up the recommended dietary allowance of vitamin D from the amount cited in their last report, released 13 years ago.