Telomeres, those protective caps on the ends of your chromosomes, tell tales about your biological aging process. The unhealthier your lifestyle habits, the more premature damage occurs to them, leadi ...

NBC’s Dr. Natalie Azar and TODAY nutrition and health expert Joy Bauer break down the basics of vitamin D, including why it's important, how much you should get per day, natural sources, the health ...

Many medical and nutritional experts strongly support dietary supplements. But it's not all good news. Here's how to weigh the pros and cons.

Certain habits can make alopecia areata worse. Knowing what to avoid when you have alopecia areata may help prevent hair loss ...

The B vitamins, especially B12, are also important for people with diabetes. These vitamins help the body turn food into ...