If you’re vitamin D-deficient, taking a vitamin D3 supplement could offer potential benefits, experts say. But how often do you actually need to take it, and who should avoid it?

There are two sources of vitamin D: Vitamin D2 comes from fortified foods and mushrooms, while vitamin D3 is produced in the skin when exposed to sunlight (which is why it’s often known as the ...

This study investigates the effectiveness of a vitamin D3-loaded nanoemulsion in improving the core symptoms of autism spectrum disorder (ASD) in children.

Vitamin D3 helps the body absorb calcium and promotes bone health. Experts discuss the benefits, risks, best sources and more.

Vitamin D2 is plant-based, while vitamin D3 comes from animal products and sunlight. Depending on your needs, one may be more effective than the other.

If you’re vitamin D-deficient, taking a vitamin D3 supplement could offer potential benefits, experts say. But how often do you actually need to take it, and who should avoid it?

"Many Americans are deficient in vitamin D due to limited sun exposure from indoor lifestyles, sunscreen use and our northern ...

A new study suggests vitamin D could reduce biological aging by nearly three years, highlighting its role in telomere protection and chronic disease prevention.

Learn the key benefits and differences between vitamin D2 and D3, where each comes from, and how much to get per day, according to experts.

The best vitamin D supplement for a person will depend on their age, vitamin D levels, and personal preferences. Learn six options to consider.

Both vitamin D and D3 have their own health benefits. Experts explain the different qualities of the two vitamins.

Vitamin D3 provides many benefits. Your bones, muscles and entire immune system need it to survive.