Changes in serum 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D and 1,25-dihydroxyvitamin D in response to three vitamin D3 supplementation regimens

2016 ◽  
Author(s):  
Jonathan Tang ◽  
Holly Nicholls ◽  
John Dutton ◽  
Isabelle Piec ◽  
Christopher Washbourne ◽  
...  
Keyword(s):  
Vitamin D3 ◽  
Hydroxyvitamin D ◽  
Dihydroxyvitamin D ◽  
1,25 Dihydroxyvitamin D ◽  
Vitamin D3 Supplementation ◽  
25 Hydroxyvitamin D

Profiles of 25 hydroxyvitamin D and its metabolites 24, 25-dihydroxyvitamin D and 1, 25-dihydroxyvitamin D in vitamin D3 supplementation studies

2016 ◽  
Author(s):  
Jonathan Tang ◽  
Holly Nicholls ◽  
John Dutton ◽  
Isabelle Piec ◽  
Christopher Washbourne ◽  
...  
Keyword(s):  
Vitamin D3 ◽  
Hydroxyvitamin D ◽  
Dihydroxyvitamin D ◽  
Vitamin D3 Supplementation ◽  
25 Hydroxyvitamin D

Profiles of 25 hydroxyvitamin D and its metabolites 24, 25-dihydroxyvitamin D and 1, 25-dihydroxyvitamin D in vitamin D3 supplementation studies

2016 ◽  
Author(s):  
Jonathan Tang ◽  
Holly Nicholls ◽  
John Dutton ◽  
Isabelle Piec ◽  
Christopher Washbourne ◽  
...  
Keyword(s):  
Vitamin D3 ◽  
Hydroxyvitamin D ◽  
Dihydroxyvitamin D ◽  
Vitamin D3 Supplementation ◽  
25 Hydroxyvitamin D

scholarly journals Immunopurified 25-hydroxyvitamin D 1 alpha-hydroxylase and 1,25-dihydroxyvitamin D 24-hydroxylase are closely related but distinct enzymes.

1992 ◽  
Vol 267 (5) ◽  
pp. 3498-3505 ◽  
Author(s):  
M Burgos-Trinidad ◽  
R Ismail ◽  
R.A. Ettinger ◽  
J.M. Prahl ◽  
H.F. DeLuca
Keyword(s):  
Hydroxyvitamin D ◽  
Dihydroxyvitamin D ◽  
1,25 Dihydroxyvitamin D ◽  
25 Hydroxyvitamin D

An international comparison of vitamin D metabolite measurements.

1984 ◽  
Vol 30 (3) ◽  
pp. 399-403 ◽  
Author(s):  
M J Jongen ◽  
F C Van Ginkel ◽  
W J van der Vijgh ◽  
S Kuiper ◽  
J C Netelenbos ◽  
...  
Keyword(s):  
Reference Sample ◽  
Plasma Samples ◽  
Internal Reference ◽  
Hydroxyvitamin D ◽  
Dihydroxyvitamin D ◽  
1,25 Dihydroxyvitamin D ◽  
Three Samples ◽  
25 Hydroxyvitamin D ◽  
Laboratory Survey ◽  
Standard Solutions

Abstract An international 19-laboratory survey was organized to compare assays for 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D, and 1,25-dihydroxyvitamin D in plasma. Each participant received two ethanolic standard solutions of each metabolite and eight plasma samples. Each laboratory used its usual procedures. Mean interlaboratory coefficients of variation (CVs) for the eight plasma samples were 35%, 43%, and 52% for 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D, and 1,25-dihydroxyvitamin D, respectively. Average CVs for the standard solutions were 27%, 23%, and 25%, respectively. Of the eight plasma samples, five had the same concentration for one of the metabolites. One sample was diluted to 0.6 times its original concentration and three samples were fortified with one or more of the metabolites under investigation. Fourteen of 18 laboratories (78%) could distinguish between the five unchanged samples and the modified ones with their 25-hydroxyvitamin D assay. Nine of 12 (75%) could distinguish the modified samples from the other samples with the 24,25-dihydroxyvitamin D assay. Only eight of 15 (53%) could do this their 1,25-dihydroxyvitamin D assay. Values from different laboratories evidently cannot be intercompared without making an actual comparison of the assay procedures. Furthermore, in case of clinical applications of these assays, each laboratory should establish its own reference values and should continually use an internal reference sample to assess the precision of the procedures.

scholarly journals Comparison of vitamin D2 and vitamin D3 supplementation in raising serum 25-hydroxyvitamin D status: a systematic review and meta-analysis

2012 ◽  
Vol 95 (6) ◽  
pp. 1357-1364 ◽  
Author(s):  
Laura Tripkovic ◽  
Helen Lambert ◽  
Kathryn Hart ◽  
Colin P Smith ◽  
Giselda Bucca ◽  
...  
Keyword(s):  
Systematic Review ◽  
Vitamin D3 ◽  
Meta Analysis ◽  
Vitamin D2 ◽  
Hydroxyvitamin D ◽  
Vitamin D3 Supplementation ◽  
25 Hydroxyvitamin D
Sign in / Sign up

Export Citation Format

Share Document