Autoimmune diseases are severe inflammatory conditions, rheumatoid arthritis is one of them.
The body’s immune system starts to attack its own tissue which is a big problem. Decreasing the risk for that to happen would be a very big help.
The following study which went on for 5.3 years and included 25 871 participants divided into several groups and either supplemented with vitamin D 2000 IU per day, omega 3 fish oil 1000 mg per day, both vitamin D and omega 3 fish oil, or a placebo supplement (Hahn J, et.al., 2021).
The results showed supplementation with both vitamin D and omega 3 fatty acids decreased autoimmune disease by about 30% compared to the placebo.
Rheumatoid arthritis incidence was approximately 40% lower in the supplementation groups than in the placebo groups.
Both supplementation with vitamin D and omega 3 fish oil individually was effective, but the combination of both worked the best.
Jill Hahn, Nancy R Cook, Erik K Alexander, Sonia Friedman, Joseph Walter, Vadim Bubes, Gregory Kotler, I-Min Lee, JoAnn E Manson, Karen H Costenbader Vitamin D and marine omega 3 fatty acid supplementation and incident autoimmune disease: VITAL randomized controlled trial, Clinical Trial BMJ. 2022 Jan 26;376:e066452.
Observational studies suggest that low levels of this vitamin can be associated with an increased risk of dying from conditions such as cancer, cardiovascular disease and diabetes (Autier P, Gandini S, 2007).