Free 25OH Vitamin D

Why calculating ?… Measure it directly.


Free 25OH Vitamin D ELISA

more info :


Free 25OH Vitamin D ELISA

  • Simple, accurate and direct method
  • CE-marked
  • Validated on open ELISA instruments

Free 25OH vitamin D ELISA

The Free 25OH Vitamin D ELISA is a competitive ELISA assay, based on patented monoclonal antibodies, that allows for the direct measurement of the free fraction of 25OH Vitamin D in serum.


New publication in Journal of AOAC International entitled “A Direct Assay for Measuring Free 25-Hydroxyvitamin D”.



Listen to our Principal Scientist, Dr. Nicolas Heureux, who presents the free Vitamin D concept and clinical utility.