Close
  Indian J Med Microbiol
 

Figure 1: The metabolism of vitamin D. Cholecalciferol (Vitamin D3) and ergocalciferol (Vitamin D2) are the primary sources of Vitamin D in vivo. Cholecalciferol is photosynthesized in response to ultraviolet irradiation of the skin and can be acquired directly by dietary intake. Ergocalciferol can only be acquired through food intake. Vitamin D obtained from any source is then converted to 1,25(OH)2D3 by liver and kidney metabolism.

Figure  1: The metabolism of vitamin D. Cholecalciferol  (Vitamin D3) and ergocalciferol  (Vitamin D2) are the primary sources of Vitamin D <i>in  vivo</i>. Cholecalciferol is photosynthesized in response to ultraviolet irradiation of the skin and can be acquired directly by dietary intake. Ergocalciferol can only be acquired through food intake. Vitamin D obtained from any source is then converted to 1,25(OH)<sub>2</sub>D<sub>3</sub> by liver and kidney metabolism.