Vitamin D alleviates acute graft-versus-host disease through promoting the generation of Foxp3 + T cells

Vitamin D (VD) refers to a group of fat-soluble secosteroids that increase intestinal absorption of calcium, magnesium, and phosphate and exhibit numerous other biological effects (1). The most important compounds in VD in humans are VD3 (also known as cholecalciferol) and VD2 (ergocalciferol), which can be obtained via diet or supplements (2,3)