Vitamin D is a nutrient that’s important for bone health, inflammation, and immune function. Vitamin D is also needed for red blood cell production. As a result, a low level may lead to anemia. It’s ...

Vitamin D plays a crucial role in bone health. FotoHelin/ Shutterstock When the days shorten and the sun sinks low in the sky, that familiar winter slump sets in. There’s a fundamental reason for this ...

Taking one type of vitamin D supplement seems to cut the levels of another type that is more easily used by the body, which could affect our immune system. Our bodies create vitamin D when ultraviolet ...