The evaluation of nightshade elimination diet (NED) on inflammatory and rheumatologic markers of rheumatoid arthritis patients: study protocol for a randomized controlled trial.

Background: Rheumatoid arthritis (RA) is a chronic disease with a global prevalence rate of 1%. Patients with RA often associate specific foods like tomatoes and eggplants with adverse symptoms. These plants contain solanine, which could potentially contribute to bone and joint damage.