[Local data] Serum 3-epi-25-hydroxyvitamin D concentration and its influencing factors
3-epi-25-hydroxyvitamin D [3-epi-25 (OH) D3], an isomeric form of 25(OH) D3, is also a biologically inactive metabolite which may lead to underestimation of hypovitaminosis D. A local study conducted by the Chinese University of Hong Kong reported levels of 3-epi-25 (OH) D3 in maternal and fetal circulation, as well as factors influencing their concentrations.