How could diet affect rheumatoid arthritis?

Although there is a clear relationship between diet and the immune system, the relationship between nutritional status and autoimmunity is not well understood. The effect of particular diets (e.g., the Mediterranean diet, vegetarian, elimination diets) on RA symptoms and pathology is currently unclear, but it's an active area of research. Therefore, people with RA should consult closely with their physician or rheumatologist before starting a special diet.^[1]