Greatly improved Vitamin D testing repeatability
Improved Repeatability of a Vitamin D Assay in Plasma Samples Obtained From Mechanical Separator Tubes
J Appl Lab Med. 2020 Mar 1;5(2):423-425. doi: 10.1093/jalm/jfz011.
Anne L Bruinen 1, Marcel J W Janssen 1
Have seen no indication that these separator tubes are in wide-spread use
Thee were no citations of this study as of June 2021
* Vitamin D testing accuracies, including dried blood spot – Jan 2020
* Vitamin D deficiency of a group - 15 pcnt to 48 pcnt (depends on tester used) - Nov 2017
* Big differences (~10 ng) in vitamin D test results, even when using the same type of tester – Aug 2015
* 4 popular vitamin D testers gave very different results (no surprise) – June 2021