Current research shows a significant correlation between vitamin D levels and autoimmunity (1.) Vitamin D is a fat-soluble vitamin that people typically associate with strong bones, because of its importance in aiding calcium absorption and homeostasis. The active form of vitamin D in the body, calcitriol, is also crucial for normal cellular differentiation, proliferation, and growth. Especially important within the context of this article is the effect of vitamin D on the immune system. Calcitriol has an immunomodulatory effect on autoimmunity by decreasing the production of inflammatory cytokines (chemical messengers)…to learn more go to