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Dietary Supplement Laboratory Quality Assurance Program: Exercise 2 Final Report

Published

Author(s)

Hugh Hayes, Jenna Klingsick, Colleen Bryan Sallee, Sanem Hosbas Coskun

Abstract

The National Institute of Standards and Technology (NIST) Dietary Supplement Laboratory Quality Assurance Program (DSQAP) was launched in 2007 in part as a collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements (ODS). The DSQAP enables laboratories to improve the accuracy of measurements in samples for nutrients, marker compounds, toxic elements, and/or contaminants in dietary supplement ingredients and finished products. Primary program goals include centering the consensus range about the target value and reducing the size of the consensus range. Exercise 2 is the seventeenth DSQAP exercise (previously, they were designated "A" through "O"). Exercise 2 was designed with four studies, offering the opportunity for laboratories to assess their in-house techniques on a variety of measurements. Studies included determinations of select toxic elements in ginger and eleuthero extracts, vitamins in a multivitamin and saw palmetto extract, fatty acids in fish oils, and botanical marker compounds in dietary supplement ingredient materials and finished products. This report summarizes the results, describes observations, and provides technical recommendations for measurement improvements.
Citation
NIST Interagency/Internal Report (NISTIR) - 8559
Report Number
8559

Keywords

Botanicals, Consumer Safety, Dietary Supplements, Quality Assurance, Reference Materials

Citation

Hayes, H. , Klingsick, J. , Bryan Sallee, C. and Hosbas Coskun, S. (2025), Dietary Supplement Laboratory Quality Assurance Program: Exercise 2 Final Report, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.8559, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=959203 (Accessed February 11, 2025)

Issues

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Created January 24, 2025