25-hydroxy vitamin D test (25-OH vitamin D test, Calcidiol 25-hydroxycholecalciferol test)

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25-hydroxy vitamin D test

Alternate Names : 25-OH vitamin D test, Calcidiol 25-hydroxycholecalciferol test

Definition

The 25-hydroxy vitamin D test is the most accurate way to measure how much vitamin D is in your body.

In the kidney, 25-hydroxy vitamin D changes into an active form of the vitamin. The active form of vitamin D helps control calcium and phosphate levels in the body.

This article discusses the blood test used to measure the amount of 25-hydroxy vitamin D.

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