Taking vitamin D2 may lower vitamin D3 levels, suggesting the two forms aren’t interchangeable. Vitamin D3 appears more ...

Experts haven’t agreed on a number that defines a low vitamin D level. For most healthy people, the Office of Dietary Supplements states that a vitamin D serum (blood) level below 20 nanograms per ...

Our bodies create vitamin D when ultraviolet rays in sunlight convert a protein called 7-dehydrocholesterol in the skin into a type of vitamin D known as vitamin D3. When sunlight is sparse during ...

The National Institutes of Health reports that one in four Americans is deficient in Vitamin D. This essential nutrient is especially important as we head into the cooler weather in fall and winter.

WEEK, JUST IN TIME FOR THE 4TH OF JULY. WELL, IN THIS MORNING’S WOMAN’S DOCTOR, WE ALL GET VITAMIN D FROM BEING IN THE SUN, BUT HOW MUCH DO WOMEN REALLY NEED? WOMEN AGES 30 TO 70 NEED ABOUT 600 ...

When the summer sun fades and the days get shorter, you might notice yourself feeling a little more tired, melancholic, or even catching colds. This happens to millions of us every year, and it’s ...

Vitamin D is important for many parts of your health, including your bones, immune system, and muscles. Some studies show that taking vitamin D supplements daily may help lower blood pressure, too.

Endocrinologists and dietitians explain the link. More than one in three American adults has prediabetes, a condition where blood sugar levels are higher than normal, but not high enough to be ...

A new scientific analysis finds that people with prediabetes who take vitamin D have a lower risk of developing type 2 diabetes. Previous research has found a similar link. Endocrinologists and ...