Vitamin D is vital for immunity, brain health, strong bones, and overall well-being, but taking in too much from supplements ...

Taking too much vitamin D can cause serious side effects. Learn the signs, why you might feel weird after taking it, and when to talk to your healthcare provider.

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 ...

Eggs are a solid source of vitamin D, but many foods like cod liver oil, rainbow trout, and fortified milk contain higher ...

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 ...

The National Academies of Sciences, Engineering, and Medicine notes that: Women 51 and older and men 71 and older need 1,200 ...

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 ...

Vitamin D absorption is significantly impacted by what you eat and when you take supplements. High-fibre meals, excessive vitamin A, and certain medic ...

A doctor explains who truly needs a vitamin D supplement in the winter, how to tell if you're deficient, and when supplementation can help support overall health.

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

Vitamin D is one of the most important vitamins. It plays a critical role in helping your body absorb calcium, supporting your immune system and keeping your muscles and brain cells functioning ...