Beneficial effects of fish oil and cranberry juice on disease activity and inflammatory biomarkers in people with rheumatoid arthritis

•Cranberry juice added beneficial results to fish oil supplementation in terms of disease activity score (Disease Activity Score-28 for rheumatoid arthritis with C-reactive protein) in people with rheumatoid arthritis.•Cranberry juice added beneficial results to fish oil supplementation on the inflammatory mediators of erythrocyte sedimentation rate and C-reactive protein in people with rheumatoid arthritis.•Ingestion of cranberry juice added beneficial effects to the well-known action of fish oil on disease activity and inflammatory biomarkers in people with rheumatoid arthritis.