Vitamin E and Autoimmune Diseases: A Narrative Review.

Autoimmune diseases are characterized by the attack of the immune system to normal tissues. Patients with autoimmune diseases usually have the deficiency of dietary factors that may be related to the etiology of these conditions. Given the role of vitamin E as a physiologic stabilizer of lysosomal membranes, its deficiency can initiate the process of autoimmune diseases or accelerate its progress. It is supposed that vitamin E could reduce oxidative stress, which is an important factor in the pathogenesis of autoimmune diseases. The literature review is indicative of a decrease in the serum levels of vitamin E in almost all autoimmune diseases. Furthermore, there is evidence regarding the possible therapeutic value of vitamin E in the management of autoimmune diseases. Owing to the anti-inflammatory and protective effect of vitamin E against free radicals, and also its important effect on cytokines levels, this vitamin may play a powerful role in the prevention and treatment of rheumatoid arthritis, as well as joint inflammation and damage. Moreover, increased vitamin E intake might decrease the incidence and severity of certain autoimmune diseases through the regulation of the immune system. [ABSTRACT FROM AUTHOR]