Too much vitamin D can harm your health. Know the warning signs, side effects, and safe ways to manage your vitamin D levels ...

Winter means less time in the sun, but there are foods that can help you get the vitamin D your body needs to function.

Symptoms that can physically present themselves include tooth decay or pain, muscle pain and cramps and weakness or certain ...

Vitamin D is often called the “sunshine vitamin,” and for good reason. Your body makes it when sunlight touches your skin. It also comes from certain foods and supplements. Most people know vitamin D ...

While most people don’t get enough vitamin D—a nutrient that’s crucial for bone and muscle health—it is possible to get too much. This can happen if you are taking multiple vitamin D-containing ...

BOSTON – Dr. Mallika Marshall is answering your latest health questions. If you have a question, email her or message her on Facebook or X (formerly known as Twitter). Jack in Lexington writes, "Maybe ...

Many people supplement with vitamin D, especially during the colder months when it’s more difficult to get your daily dose from sunlight (since your skin makes vitamin D with sufficient sunlight ...

Find out how vitamin C and vitamin D function in your body, their role in immune defense, and how much you may need for optimal support.

Vitamin D deficiency can lead to osteomalacia, a rare bone disorder that causes bone pain and muscle weakness. But taking too ...

Low levels of vitamin D seem to raise your risk of heart attack but scientists are still figuring out why—and whether ...

Vitamin D3 and vitamin K2 work together to support bone strength, improve calcium use, and help maintain healthy bone density.

People with vitamin D deficiency are at greater risk of becoming depressed, and those with depression are more likely to be deficient in vitamin D.