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Vitamin D Testing

Analytical & Clinical Conundrums


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Vitamin D3

Slide 7

January 2009

Vitamin D3 can be ingested in the form of diet by consuming fish and meat. Vitamin D is also synthesized by exposure to the sunlight. Once vitamin D enters the circulation it is rapidly converted to 25-hydroxy vitamin D3 by liver. 25-hydroxy vitamin D3 will also be converted to 1,25-dihydroxy vitamin D3, which is in minute amounts in circulation but is the bioactive hormone helping in calcium absorption from the intestine.

Vitamin D3


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