3-epi-25-hydroxyVitaminD3is the C-3 epimer of 25-hydroxyvitaminD3.1Dietary administration of 3-epi-25-hydroxyvitaminD3(0.5 and 1 IU g) decreases levels of serum parathyroid hormone (PTH) in male, but not female, weanling rats. 1.Djekic-Ivankovic, M., Lavery, P., Agellon, S., et al.The C-3α epimer of 25-hydroxycholecalciferol from endogenous and exogenous sources supports normal growth and bone mineral density in weanling ratsJ. Nutr.147(2)141-151(2017)