The PubMed word search included “rheumatoid arthritis” and “nutrition” or “diet” and “c-reactive protein” or “IL-1” or “IL-6” or “IL-17” or “IL-18” or “cytokines.” Articles were filtered to include those published between 2016 and 2022 to improve efficacy of the review and capture the most recent and prominent research. This evidence concerns the gene IL17A and rheumatoid arthritis.