Another key difference between the two forms of vitamin D is their source. “Vitamin D2 is usually produced by plants when exposed to sunlight,” Dr. Jiang says. Meanwhile, vitamin D3 is found in animal ...

Vitamin D2 vs Vitamin D3 Vitamin D is found in two different forms; ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3), each of which differs slightly in terms of chemical structure.

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?

The various forms of vitamin K are all fat-soluble molecules, each with the same methylated naphthoquinone ring structure. The two main forms of vitamin K are vitamin K1 and vitamin K2.

Diagram showing biosynthesis of active form of vitamin D - Calcitriol - via the kidneys and the liver - schematic molecular structure chemical illustration. Image Credit: Bass stock/Shutterstock.com ...

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

In allergic asthma condition, consuming vitamin D3 alters the cellular inflammatory reaction, revealed Department of Molecular Pneumology researchers.

Vitamin D is more than just one vitamin. It’s a family of nutrients that shares similarities in chemical structure. In your diet, the most commonly found members are vitamin D2 and D3.