Cholecalciferol

A form of Vitamin D also known as Vitamin D3. It is derived from animal sources and synthesized in human skin when exposed to sunlight (UVB rays). Cholecalciferol is considered more effective than ergocalciferol (Vitamin D2) at raising and maintaining blood levels of Vitamin D.

Key Difference

Cholecalciferol (Vitamin D3): Animal-based and more bioavailable, making it superior for sustaining long-term Vitamin D levels compared to ergocalciferol (Vitamin D2).

How It Works

Cholecalciferol is converted into its active form in the liver and kidneys to support calcium absorption, bone health, and immune function. It is the same compound naturally produced by the body when skin is exposed to sunlight.

Common Sources

Cholecalciferol is found in foods like fatty fish (salmon, mackerel), egg yolks, and liver. It is also used in fortified foods and dietary supplements, especially those targeting Vitamin D deficiency.

Key Takeaway

Cholecalciferol is a highly effective form of Vitamin D3, naturally produced in the skin or obtained from animal-based foods. It is preferred for improving and maintaining Vitamin D levels due to its superior absorption and activity in the body.

Back to Vitamin D

What Is Cholecalciferol