Assessment of total vitamin D intake from foods and dietary supplements (DSs) may be incomplete if 25-hydroxyvitamin D [25­(OH)­D] intake is not included. However, 25­(OH)­D data for such intake assessments are lacking, no food or DS reference materials (RMs) are available, and comparison of laboratory performance has been needed. The primary goal of this study was to evaluate whether vitamin D<sub>3</sub> and 25­(OH)­D<sub>3</sub> concentrations in food and DS materials could be measured with acceptable reproducibility. Five experienced laboratories from the United States and other countries participated, all using liquid chromatography tandem–mass spectrometry but no common analytical protocol; however, various methods were used for determining vitamin D<sub>3</sub> in the DS. Five animal-based materials (including three commercially available RMs) and one DS were analyzed. Reproducibility results for the materials were acceptable. Thus, it is possible to obtain consistent results among experienced laboratories for vitamin D<sub>3</sub> and 25­(OH)­D<sub>3</sub> in foods and a DS

Similar works

Full text

oaioai:figshare.com:artic...Last time updated on 2/12/2018

This paper was published in FigShare.

Having an issue?

Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.