“…Patients on methotrexate had a significantly reduced intake of folic acid as a percentage of RDI compared with those on other therapies Cehran et al, 2003 [67] Cohort study Moderate Intake of certain antioxidant micronutrients, particularly beta-cryptoxanthin and supplemental zinc, and possibly diets high in fruits and cruciferous vegetables, may be protective against the development of RA Tanner et al, 1990 [68] Observational study Moderate A subset of RA patients might have food sensitivity as a component of clinical activity Carbohydrates Strenght of evidence: MODERATE Zhernakova et al, 2011 [69] Meta-analysis High Some gene loci established in either celiac disease (CD) or RA are associated with the other autoimmune disease Voight et al, 2012 [70] Narrative review Low Autoimmune and inflammatory diseases share an underlying genetic basis in common Lerner et al, 2015 [71] Narrative review Low The intestinal mucosa have all the necessary tools to produce neo-epitopes, breaking tolerance to self-antigens, by citrullination (PAD) and crosslinking (tTg, neo-epitope tTg, mTg) initiating autoimmunogenic dysregulation and autoantibody generation in RA Collin et al, 1994 [72] Case-control study Moderate RA can present with several other concomitant disorders such as CD Lodhi et al, 2018 [73] Case report Low RA can present with several other concomitant disorders such as CD Warjri et al, 2015 [74] Case report Low Gut-derived antigens of CD may have a role in the pathogenesis of other autoimmune disorders including RA He et al, 2016 [62] Cross sectional study Moderate High intakes of carbohydrates (e.g., potatoes) might be associated with increased RA risks Hu et al, 2017 [55] Cohort study Moderate A healthier diet, with fruits and whole grains, is associated with a reduced risk of RA occurring at 55 years of age or younger, particularly seropositive RA Hu et al, 2014 [75] Cohort study Moderate Regular consumption of sugar-sweetened soda, but not diet soda, is associated with increased risk of seropositive RA in women De Christopher et al, 2016 [76] Cross sectional study Moderate Beverages with excess free fructose intake are significantly associated with arthritis in US adults aged 20e30 years Barber et al, 2015 [77] Systematic Review High Regular screening for CV disease risk factors is an important part of care in patients with RA Lindhardsen et al, 2011 [78] Cohort study Moderate RA is associated with the same risk of myocardial infarction as diabetes mellitus Extra-virgin olive oil Strenght of evidence: MODERATE Linos et al, 1999 [54] Case-control study Moderate Consumption of both cooked vegetables and olive oil is inversely and independently associated with risk of RA Hu et al, 2017 [55] Cohort study Moderate A healthier diet, with extra virgin olive oil, is associated with a reduced risk of RA occurring at 55 years of age or younger, particularly seropositive RA Rosell et al, 2009 …”