C4A and rheumatoid arthritis: After 1 month of treatmentSignificant decrease in leukocyte and platelet count (p < 0.003), IgM rheumatoid factors (p < 0.02), IgG, C3 (p < 0.04) and C4 complement components (p < 0.01), calprotectin (p < 0.03) and C3 activation products in diet responders in vegetarian diet groupKey note: Dietary interventions can help in improvement of disease in some RA patients