Office of Dietary Supplements VDSP Commutability Study 2

---
identifier: "/us/fr/2015-07326"
source: "fr"
legal_status: "authoritative_unofficial"
title: "Office of Dietary Supplements VDSP Commutability Study 2"
title_number: 0
title_name: "Federal Register"
section_number: "2015-07326"
section_name: "Office of Dietary Supplements VDSP Commutability Study 2"
positive_law: false
currency: "2015-04-01"
last_updated: "2015-04-01"
format_version: "1.1.0"
generator: "[email protected]"
agency: "Health and Human Services Department"
document_number: "2015-07326"
document_type: "notice"
publication_date: "2015-04-01"
agencies:
  - "Health and Human Services Department"
  - "National Institutes of Health"
fr_citation: "80 FR 17441"
fr_volume: 80
---


#  Office of Dietary Supplements VDSP Commutability Study 2

**SUMMARY:**

NIH Office of Dietary Supplements (ODS) and the National Institute of Standards and Technology (NIST), in collaboration with the College of American Pathologists (CAP) and Vitamin D External Quality Assessment Scheme (DEQAS), announce that as part of the Vitamin D Standardization Program (VDSP), they are recruiting laboratories to participate in a study of the commutability of pooled serum samples used in assays to measure total 25-hydroxyvitamin D [25(OH)D].

**DATES:**

The expected start date for the study is June 2015.

**ADDRESSES:**

For more information about the study and to let us know if you are interested in participating, please contact us at: *[email protected].*

**FOR FURTHER INFORMATION CONTACT:**

Drs. Johanna Camara, NIST, and Christopher Sempos, ODS, Director and Co-Director, respectively, for the VDSP Commutability Study 2. Email: *[email protected].*

**SUPPLEMENTARY INFORMATION:**

The objective of the study is to promote the standardized measurement of total 25(OH)D by evaluating the commutability of NIST Standard Reference Materials® (SRM) used as “trueness” controls and the materials used in the major Performance Testing/External Quality (PT/EQA) programs administered by CAP and DEQAS. *Who Can Participate:* (1) All commercial manufacturers of 25(OH)D assays (requests from manufacturers with assays in development will be considered); (2) Clinical and research laboratories using a commercial assay platform; (3) Laboratories for national/subnational nutrition surveys; and (4) Laboratories using in-house developed assays.

For details about the study design and time lines, see the recently published paper in the February 2015 edition of Clinical Laboratory News, ( *https://www.aacc.org/publications/cln/articles/2015/february/vitamin-d-commutability-study* ).

Dated: March 24, 2015.

Lawrence A. Tabak,

Deputy Director, National Institutes of Health.