It has been more than 3 decades since the first assay assessing circulating 25-
hydroxyvitamin D [25 (OH) D] in human subjects was performed and led to the definition of …

OBJECTIVES: For quantification of 25-hydroxyvitamin D3 (25OH-D3), 25-hydroxyvitamin D2
(25OH-D2), 3-epi-25-hydroxyvitamin D3 (3-epi-25OH-D3) and 24R, 25-dihydroxyvitamin D3 …

Vitamin D is a 9, 10-seco steroid, as shown by the numbering of its carbon skeleton. Vitamin
D has 2 distinct forms: vitamin D2 and vitamin D3. Vitamin D2 is a 28-carbon molecule …

One of the major factors responsible for the explosion of knowledge related to vitamin D
metabolism and its relation to clinical disease was the introduction of competitive protein …

Background Despite considerable global investigation over several decades, the roles of
vitamin D in health and disease development remains convoluted. One recognised issue is …

BACKGROUND: Vitamin D testing is becoming increasingly important with recent research
demonstrating a correlation between vitamin D insufficiency and metabolic diseases …

Vitamin D is a micronutrient with pleiotropic effects in humans. Due to sedentary lifestyles
and increasing time spent indoors, a growing body of research is revealing that vitamin D …

OBJECTIVES: The performance of recently developed vitamin D total assays (ADVIA
Centaur and Elecsys) was compared to that of liquid chromatography–tandem mass …

Abstract The Vitamin D Standardization Program (VDSP) coordinated an interlaboratory
study to assess the comparability of measurements of total 25-hydroxyvitamin D [25 (OH) D] …

The role of vitamin D in maintaining bone health has been known for decades. Recently,
however, the discovery that many tissues expressed the vitamin D receptor and were able to …