Comparison of a Reformulated Automated Vitamin D Assay, Its Predecessor, and 2 Contemporary Formulations.

Key Points

• The aim is to compare a reformulated automated vitamin D assay with its predecessor and two contemporary formulations regarding their effectiveness.
• Evaluated multiple automated vitamin D assays.
• Assessed recovery rates of 25OHD2.
• Analyzed clinical classification of vitamin D nutritional status.
• All assays were adequate for classifying vitamin D nutritional status.
• 25OHD2 recovery is no longer a significant issue for these assays.
• Assays are suitable for routine use, even with high-dose vitamin D2 prescriptions.