Medica Hospital - Serum 25-hydroxy Vitamin D test is the most accurate way to monitor the total amount of Vitamin D in your body. It is used to evaluate disorders of calcium
A comparison of analytical methods for measuring concentrations of 25-hydroxy vitamin D in biological samples - Analytical Methods (RSC Publishing)
Total 25-OH Vitamin D ELISA
25-OH Vitamin D (total) ELISA - DRG International, Inc.
25-OH Vitamin D3/D2 RP-HPLC Kit - Immundiagnostik, Inc.
05P0235 25-OH Vitamin D Reagent - Henry Schein Medical
Vitamin D Tests - My Endo Consult
Vitamin D for COVID-19: where are we now? | Nature Reviews Immunology
Vitamin D3 metabolite ratio as an indicator of vitamin D status and its association with diabetes complications | BMC Endocrine Disorders | Full Text