Click to access mobile menu
  • Share:

Vitamin D Standardization Program (VDSP)

VDSP Vitamin D Commutability Study 2:
Laboratory testing Commutability of NIST SRMs and PT/EQA Test Materials in Clinical and Research Vitamin D Assays

Study objective
To promote the standardized measurement of total 25-hydroxyvitamin D [25(OH)D] by evaluating the commutability of NIST SRMs used as “Trueness” controls and the materials used in the major PT/EQA programs.

Federal Register callexternal link disclaimer for participants, April 2015

Who can participate

  • All commercial assay manufacturers
    • Focus on commercially-available assay platforms
    • Will consider requests for assays in development   
  • Clinical and research laboratories using a commercial assay platform
  • Laboratories for national/subnational nutrition surveys
  • Laboratories with in-house developed assays

How to participate
Contact Dr. Johanna Camara at  
Dr. Camara is a Research Chemist at the National Institute of Standards and Technology (NIST) and Director of VDSP Commutability Study 2.

For more details - including protocol, timeline, and participant requirements and collaborating agencies/organizations, download a PowerPoint presentation(2MB) or a PDF file.