Vitamin D deficiency impacts more than 1 billion people worldwide. Vitamin D deficiency can negatively affect a child’s growth, immune response, mental health, and more, which is why proper treatment ...

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 is a fat-soluble vitamin long associated with bone health, but emerging evidence is revealing that it has a broader role, particularly in gut health. Both animal and human studies have ...

‌Vitamins are important to your body’s health. The vitamins in your food, that you absorb from your environment, or get from supplements all work together. However, too much of certain vitamins can ...

Vitamin D tests involve taking a blood sample to measure the vitamin D levels in your bloodstream. There are two forms of vitamin D in the blood: 25-hydroxy vitamin D, or calcidiol, and 1,25-dihydroxy ...

Vitamin D is essential for many bodily processes, particularly the development of healthy bones. A 25-hydroxy vitamin D test can reveal whether the vitamin D levels in a person’s blood are within a ...

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 ...

Suzanne Fisher, RD, is a registered dietitian and licensed nutritionist with nearly 35 years of experience in evidence-based nutrition and exercise physiology. Everyone needs vitamin D. You can get ...