Is diet important in rheumatoid arthritis?

Area of Science:

• Rheumatology
• Immunology
• Gastroenterology

Background:

• Rheumatoid arthritis (RA) patients may experience symptom exacerbation due to dietary components.
• Specific foods like dairy, corn, and cereals have been implicated as potential allergens.
• The role of intestinal permeability in RA pathogenesis is under investigation.

Purpose of the Study:

• To review the evidence linking diet to rheumatoid arthritis aggravation.
• To evaluate the efficacy of different dietary intervention strategies for RA.
• To discuss appropriate research methodologies for studying dietary effects in RA.

Main Methods:

• Review of case reports and clinical therapeutic trials.
• Discussion of fasting, exclusion diets, and intestinal permeability studies.
• Consideration of single-case experimental designs (N-of-1 studies) versus traditional randomized controlled trials.

Main Results:

• Total fasting can improve RA, potentially by reducing inflammatory mediators.
• Evidence for increased intestinal permeability in RA patients is conflicting.
• Exclusion diet trials often use double-blind methods, which may not suit all RA patients.
• N-of-1 studies are proposed as a more suitable design for dietary intervention research in RA.
• The effectiveness of fish oils and evening primrose oil for long-term RA benefit is uncertain.

Conclusions:

• Dietary allergens may contribute to rheumatoid arthritis flares in some individuals.
• N-of-1 studies are recommended for evaluating dietary interventions in RA.
• Further research is needed to identify specific dietary triggers and effective management strategies.
• Novel therapeutic agents targeting inflammatory pathways, possibly derived from fatty acids, warrant investigation.