Sieglinde Zelzer, Andreas Meinitzer, Dietmar Enko, Martin H Keppel, Markus Herrmann, Verena Theiler-Schwetz, Christian Trummer, Lisa Schmitt, Andreas Tomaschitz, Patrick Sadoghi, Jutta Dierkes, Pawel Pludowski, Armin Zittermann, Winfried März, Stefan Pilz
Circulating 25-hydroxyvitamin D (25(OH)D) is the generally accepted indicator of vitamin D status. Since hydroxylation of 25(OH)D to 24-25-dihydroxyvitamin D (24,25(OH)2D) is the first step of its catabolism, it has been suggested that a low 24,25(OH)D level and a low vitamin D metabolite ratio (VMR), i.e., 24,25(OH)2D divided by 25(OH)D, may indicate high vitamin D requirements and provide additional diagnostic information beyond serum 25(OH)D. We, therefore, evaluated whether the classification of "functional vitamin D deficiency", i...
March 14, 2024: Nutrients