Keywords :
1α,25-dihydroxy-vitamin D; 24,25-dihydroxy-vitamin D; Bioavailable vitamin D; C3-epimers; Free vitamin D; Vitamin D; Vitamin D-binding protein
Abstract :
[en] Today, the possibility exists to measure a number of different vitamin D metabolites with accurate and precise methods. The most abundant vitamin D metabolite, 25(OH)D, is considered the best marker for estimating vitamin D status and is therefore the most commonly measured in clinical practice. There is no consensus on the added value of measuring other metabolites beyond 25-hydroxyvitamin D, although, in some special clinical scenarios and complicated cases, these metabolites may provide just the information needed for an accurate diagnosis. The problem this review addresses is which metabolite to measure and when and how to measure it.
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