Vitamin D and fish oil supplements and risk of autoimmune disease.

TL;DR

Research findings suggest that for women age 55 years and older, and men 50 years and Older, marine omega-3 fatty acids (fish oil) 1000 mg a day, and vitamin D 2000 IU a day—the doses used in VITAL—lead to a 22% reduction in all autoimmune diseases with vitamin D, and a 15% reduction with fish oil supplementation over 5.3 years of randomised follow-up.