Vitamin D is vital for numerous bodily functions. While sunlight is the primary source of vitamin D, record high temperatures this summer may dissuade people from spending time in the sun. An expert ...

It's that time of year when your body produces less vitamin D. Sunshine is the main source of vitamin D, and we need it to keep our bones and muscles strong. Many people take supplements to meet the ...

Our bodies create vitamin D when ultraviolet rays in sunlight convert a protein called 7-dehydrocholesterol in the skin into a type of vitamin D known as vitamin D3. When sunlight is sparse during ...

Vitamin D, a nutrient known for promoting bone health, might not be effective in protecting all seniors from injury. The U.S. Preventive Services Task Force (USPSTF) released a draft recommendation ...

What Exactly Is Vitamin D? Despite its name, vitamin D isn't a vitamin—it's a hormone. Unlike traditional vitamins that we must obtain solely from food, our bodies can produce vitamin D naturally when ...

Editor's Note: This is an excerpt from WBUR's weekly health newsletter, CommonHealth. If you like what you read and want it in your inbox, sign up here. An intriguing new study suggests vitamin D may ...

Learn why natural sources of vitamin D are so important, then stock up on these foods high in vitamin D to get closer to your daily dose.

Previous research has linked a common vitamin to a slowdown in aging — and now a new Harvard study appears to confirm those findings. The study, which was published in The American Journal of Clinical ...