Diet and Autoimmune Disease: What Does the Evidence Support?
A review published in October 2026 examined how nutrition may influence inflammation, symptoms, and disease management in people living with autoimmune diseases, including rheumatoid arthritis, lupus, multiple sclerosis (MS), ulcerative colitis, and Hashimoto’s thyroiditis.
Researchers from the University of Taubaté in Brazil reviewed recent studies on dietary patterns, nutrients, supplements, and the gut microbiome. They found that Mediterranean-style diets, which emphasize vegetables, fruits, whole grains, legumes, olive oil, and fish, have some of the most consistent evidence for improving certain symptoms and measures of disease activity, particularly in rheumatoid arthritis.
The review also highlighted research suggesting that unsaturated fatty acids, including omega-3 and omega-6 fats, may benefit people with lupus. A 2024 systematic review and meta-analysis of 10 studies found that interventions involving these fats were associated with modest reductions in lupus disease activity, although improvements in inflammatory markers were inconsistent.
Other approaches, including probiotics, prebiotics, ketogenic diets, and gluten elimination, have shown mixed or disease-specific results. In MS, some dietary interventions may help reduce fatigue or improve quality of life, but there is insufficient evidence that a particular diet changes the course of the disease. Similarly, the researchers found insufficient evidence to routinely recommend gluten-free diets for people with Hashimoto’s thyroiditis who do not have celiac disease.
The authors also cautioned that unnecessarily restrictive diets may increase the risk of nutritional deficiencies, particularly when entire food groups are eliminated without appropriate substitutions. They emphasized that dietary recommendations should account for individual nutritional needs, symptoms, medical conditions, and food tolerances.
Overall, the findings suggest that nutrition can play a supportive role in autoimmune disease management, but no single diet has been established as an effective treatment across autoimmune diseases. Dietary interventions should be individualized and used alongside established medical treatments rather than replacing them.
Food, Immunity, and Autoimmune Disease
How do different foods and dietary approaches affect immune health? GAI’s six-part series examines the science behind food choices, dietary restrictions, and common food reactions, helping readers better understand the relationship between nutrition and autoimmune disease.
Read about the six articles in this series
Examines how food may interact with the immune system, including molecular mimicry, dietary proteins, and chemical exposures. Features perspectives from immunologist Aristo Vojdani, PhD, on possible connections between food and autoimmune responses.
Discusses the role of nutrition in autoimmune disease management, including Mediterranean-style eating, anti-inflammatory diets, and the Autoimmune Protocol (AIP), with attention to potential benefits and limitations.
Explains how food allergies, intolerances, sensitivities, and celiac disease differ, why their symptoms may overlap, and how the gut microbiome and testing considerations factor into identifying food-related reactions.
Explains the differences between types of food processing, how processing can affect nutritional quality, and possible connections to gut health. Also considers practical challenges involving food access and affordability.
Examines organic food labeling and certification, agricultural practices, pesticide use, and how organic and conventional food production differ, helping readers evaluate what an organic label actually means.
Explains how elimination and reintroduction strategies are used to identify possible food triggers. Reviews common approaches, including low-FODMAP and AIP diets, and discusses their limitations, nutritional risks, and the importance of professional guidance.
Citation
Ferreira GWDS, Ferretti RDL. Nutritional interventions and inflammatory modulation in autoimmune diseases: A narrative review. International Journal of Innovative Science and Research Technology. 2026;11(9):2733–2738. https://doi.org/10.38124/ijisrt/26sep1411