Vitamin D

Vitamin D Explanations

Vitamin D has two main forms: ergocalciferol, or vitamin D2, and cholecalciferol, or vitamin D3. These are fat-soluble substances, which act as hormones after conversion to functional usage by the body. Most vitamin D3 is obtained through skin exposure to ultraviolet B radiation, typically from sunlight but also from sources such as tanning booths. Conversion …