What is the Difference Between Vitamin D and Vitamin D3?

The main difference between Vitamin D and Vitamin D3 lies in their sources and their specific forms. Both Vitamin D2 and Vitamin D3 are called "Vitamin D" and share similar functions in the body, but they have different origins and structures:

• Vitamin D: This term refers to both Vitamin D2 and Vitamin D3, which are essential nutrients for various bodily functions, including bone health, immune system, and muscle function.
• Vitamin D3: Also known as Cholecalciferol, Vitamin D3 is the natural form of Vitamin D produced by the body when exposed to sunlight. It is also found in animal sources such as fatty fish, fish oil, liver, organ meats, and egg yolks.
• Vitamin D2: This form of Vitamin D is derived from plants and fortified foods. It is produced when certain plants are exposed to ultraviolet light from the sun.

Both Vitamin D2 and Vitamin D3 must pass through the liver and kidneys, where they are processed into the active, usable form of Vitamin D. Research shows that Vitamin D3 is more effective at raising blood levels of Vitamin D and is considered more stable than Vitamin D2.

Comparative Table: Vitamin D vs Vitamin D3

Here is a table highlighting the differences between Vitamin D and Vitamin D3:

Both Vitamin D and Vitamin D3 are essential for various bodily functions, but they differ in their sources, toxicity, and absorption. Vitamin D3 is considered superior due to its higher absorption rate and lower toxicity compared to Vitamin D2.