Diet & Autoimmune Disease
Diet is one of the most debated areas in autoimmune disease. Food can affect metabolism, the gut microbiome, body weight, and inflammatory pathways, making it reasonable to ask whether diet can also influence autoimmune disease.
Research suggests that dietary patterns may affect symptoms, inflammation, and quality of life in some autoimmune conditions. Approaches being studied include the Mediterranean diet, gluten-free and elimination diets, the Autoimmune Protocol (AIP), ketogenic diets, and the Wahls Protocol.
The important question is not simply whether diet matters, but how much it matters, for which diseases, and which approaches are supported by good clinical evidence.
What Does the Research Show?
The Mediterranean diet has been studied more extensively than many specialized diets, with research suggesting possible benefits for inflammation, symptoms, and quality of life in several autoimmune conditions, although the overall certainty of the evidence remains limited.
Some diseases provide much clearer evidence. For celiac disease, a strict gluten-free diet is the established treatment. Other dietary approaches are being studied in conditions such as multiple sclerosis, rheumatoid arthritis, and Hashimoto's thyroiditis.
There is no good evidence that one diet works for every autoimmune disease.
Elimination Diets
Elimination diets temporarily remove foods suspected of contributing to symptoms and then reintroduce them systematically. Common targets include gluten, dairy, highly processed foods, and added sugars.
Physicians such as Susan Blum and Mark Hyman use elimination diets as part of their functional-medicine approaches and report substantial improvements in some patients. Small studies have also produced encouraging results in certain conditions.
However, broader elimination diets have not been established as treatments for autoimmune disease generally. Restrictive diets can also lead to nutritional deficiencies and can be difficult to maintain.
Reintroducing foods systematically can help determine whether particular foods actually seem to cause problems rather than unnecessarily avoiding them indefinitely.
Low-Carb and Ketogenic Diets
Low-carbohydrate and ketogenic diets are also being investigated. They can lower blood glucose and insulin and improve metabolic health. Ketones, particularly beta-hydroxybutyrate, may also affect inflammatory and immune pathways.
Clinical evidence in autoimmune disease is still limited and varies considerably by condition. Ketogenic diets are not established treatments for autoimmune disease.
The metabolic connection is nevertheless interesting. Obesity, insulin resistance, and chronic inflammation can occur together, so improving metabolic health may benefit some people even when it does not directly alter the autoimmune process.
A Personalized Approach
People may respond differently to the same foods. Genetics, the gut microbiome, metabolic health, medications, and the particular disease may all play a role.
This makes a carefully monitored N=1 experiment potentially useful: make a dietary change, track symptoms and relevant health measures, and see whether there is a meaningful difference.
Personal experience is not the same as scientific evidence, but it can still provide useful information for the individual.
The challenge is to distinguish changes in symptoms from actual changes in the underlying disease. Whenever possible, subjective improvement should be considered alongside objective measures of disease activity.
Key Takeaways
Diet can affect metabolic health, inflammation, the gut microbiome, and overall health.
The evidence for particular diets varies substantially among autoimmune diseases.
The Mediterranean diet has relatively strong research support; elimination, low-carb, ketogenic, AIP, and other specialized diets remain areas of investigation.
There is unlikely to be one ideal diet for every autoimmune disease or every person.
The most useful question may be: Which dietary approach helps which people with which autoimmune diseases?
Learn More
Dr. Blum presents a functional-medicine approach focused on diet, gut health, stress, environmental factors, and possible contributors to immune dysfunction.
A scientific review examining diet and autoimmune disease, including nutrients, dietary patterns, the gut microbiome, and inflammation.
Video
A rheumatologist explains how diet may influence inflammation and autoimmune disease, including the possible role of the gut microbiome and why there is no single diet that works for everyone.