In addition to its role in calcium hemostasis and bone metabolism, vitamin D also appears to be an important regulator of immune function. However, its role in modulating RA disease activity has not been studied.
Vitamin D Intake Is Inversely Associated With Rheumatoid Arthritis
Vitamin D plays an important role in bone metabolism and may also have immunomodulatory effects. Specifically, it has been shown in animals that vitamin D can suppress the effects of autoimmunity. Although we do not know whether a similar effect would be found in humans, no studies have assessed the association between Vitamin D and [...]

