Zinc and vitamin A together can produce a synergistic effect to improve vision, immunity and other vital functions.

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 seasonal fatigue: low levels of vitamin D—the "sunshine vitamin." ...

Scientists are still untangling why the nutrient gap persists—and what it reveals about how women’s health is studied and treated. A woman lounges on a chair in the sun. Vitamin D is a crucial ...

Vitamin D deficiency can lead to bone softening and subsequent bone pain and fractures. Learn its causes, diagnosis, treatment, and prevention.

If you're a vegan or vegetarian and don't eat meat, seafood or dairy products, chances are you may have been told to pay attention to your vitamin B12 levels. That's because these types of foods are ...

Vitamins and supplements are a booming industry. And while there are many important supplements that benefit people with specific deficiencies or certain health conditions, research shows and experts ...

As far as nutrients go, vitamin D is one of the most widely useful—but oft-overlooked—things we put in our bodies. For instance, “there are more than 200 known functions of vitamin D in the body,” ...

Allison Herries, RDN, is a registered dietitian for a telehealth company. In her role, she provides nutrition education and counseling to help her clients set and reach their personal health goals.

If the winter weather has you spending less time outside in the sun's rays, these foods can give you the vitamin D you need. Arielle Burton was an associate content manager on CNET's Performance ...

Taking vitamins D and K together may help strengthen your bones. Different forms of vitamins D and K are available, including pills, powder, liquid, and injections. It can be unsafe to take either ...

Even in a sun-drenched country like Israel, most people are deficient in vitamin D. But what must be added for it to actually work?