An evaluation of total 25-hydroxyvitamin D assay standardization; where are we today?

ConclusionsIn conclusion, some of the commercially available assays have been standardized with performance as required by the VDSP. However, several of the assays do still not comply with the VDSP requirements even eight years after the program was started. This may have clinical consequences for patients, and manufacturers are therefore encouraged to continue their work on standardizing serum 25-hydroxyvitamin D assays.
Source: The Journal of Steroid Biochemistry and Molecular Biology - Category: Biochemistry Source Type: research