Rheumatoid Arthritis Diet: Foods to Avoid and What the Evidence Says to Eat Instead

Ultra-processed foods cause inflammation. These foods include packaged snack foods, sugary breakfast cereals, fast food, frozen convenience meals, and many commercially prepared baked goods.

Research has linked higher intake of ultra-processed foods with increased levels of inflammatory markers such as C-reactive protein (CRP) and IL-6. These products often contain refined carbohydrates, unhealthy fats, excess sodium, and additives while providing very little fiber or nutritional value.

Ultra-processed foods also tend to replace healthier foods such as vegetables, legumes, fruit, and whole grains. For many people with rheumatoid arthritis, reducing ultra-processed food consumption is one of the most impactful dietary changes they can make.

Foods and beverages high in added sugar may lead to inflammation in several ways. High sugar intake can increase advanced glycation end products (AGEs), compounds that promote oxidative stress and inflammatory responses in the body.

Sugar-sweetened beverages, desserts, candy, pastries, and highly refined grain products can also cause rapid blood sugar spikes that activate inflammatory pathways, including NF-kB signaling.

In a survey conducted by the Arthritis Foundation, many adults with RA reported that sugary foods and drinks appeared to worsen their symptoms. While individual responses vary, reducing added sugar remains one of the most practical dietary strategies for lowering inflammatory burden.

Red meat does not need to be cut off, but excessive intake may contribute to inflammation in some individuals. Red meat contains saturated fat and compounds that can promote inflammatory activity when consumed in large amounts.

Processed meats such as bacon, sausage, hot dogs, deli meats, and salami present additional concerns because they often contain preservatives, nitrates, and higher levels of AGEs produced during processing and cooking. Current evidence supports limiting processed meat and moderating red meat intake rather than completely avoiding these foods.

Omega-6 fatty acids are essential nutrients, but many modern diets provide them in excessive amounts relative to omega-3 fats. Oils such as corn oil, sunflower oil, safflower oil, and certain processed food ingredients contribute to a high omega-6 to omega-3 ratio. This imbalance may encourage the production of pro-inflammatory prostaglandins derived from arachidonic acid.

Replacing these fats with extra virgin olive oil, avocado oil, nuts, seeds, and omega-3-rich foods may help support a healthier inflammatory balance.

One of the most common misconceptions about the rheumatoid arthritis diet is that everyone with RA should avoid gluten. Current evidence does not support routine gluten elimination for people who have rheumatoid arthritis alone.

Avoiding gluten is recommended only for individuals who also have confirmed celiac disease or another medically diagnosed gluten-related disorder. For people without celiac disease, eliminating gluten may unnecessarily restrict nutritious foods such as whole-grain breads, oats, barley products, and other fiber-rich foods.

Unless a healthcare provider identifies a specific gluten-related condition, there is no evidence-based reason for most people with RA to avoid gluten.

Alcohol and RA: The Nuance the Original Article Missed

Alcohol and rheumatoid arthritis have a complex relationship. Some observational studies have found neutral or slightly favorable associations between moderate alcohol intake and RA disease activity. However, these findings do not tell the whole story.

The most important factor is medication use. Methotrexate is one of the most commonly prescribed disease-modifying antirheumatic drugs (DMARDs) for RA. Alcohol can increase the risk of liver toxicity when combined with methotrexate.

Because of this interaction, many rheumatologists recommend limiting or avoiding alcohol while taking methotrexate. Rather than following generalized advice about moderate drinking, people with RA should discuss alcohol intake directly with their rheumatologist and healthcare team.

The Mediterranean Diet: The Most Evidence-Supported Positive Dietary Pattern for RA

When discussing rheumatoid arthritis foods to eat, no dietary pattern has stronger evidence than the Mediterranean diet. Multiple systematic reviews have evaluated Mediterranean diet adherence in people with RA.

Research consistently shows associations with lower disease activity scores, improved inflammatory markers such as CRP, and better overall health outcomes. The Mediterranean diet emphasizes vegetables, fruit, legumes, whole grains, nuts, seeds, and olive oil as primary staples. Fish is consumed regularly, usually two to three times per week, while poultry is eaten in moderation.

Red and processed meats are minimized, and ultra-processed foods are limited. The diet provides omega-3 fatty acids from fish, polyphenols from olive oil and plant foods, and large amounts of dietary fiber that support gut health. It is also naturally lower in AGEs because it focuses on minimally processed foods.

For individuals seeking a practical anti-inflammatory diet for rheumatoid arthritis, the Mediterranean diet currently offers the most evidence-based framework.

Omega-3 Fatty Acids: The Most Studied Individual Nutrient for RA

Among all nutritional interventions studied for rheumatoid arthritis, omega-3 fatty acids have the strongest evidence base. Fish oil supplements containing EPA and DHA have been evaluated in numerous randomized controlled trials.

A 2024 study of 23 trials found that omega-3 supplementation significantly reduced tender joint count, swollen joint count, morning stiffness duration, and the need for nonsteroidal anti-inflammatory drugs (NSAIDs).

Omega-3 fats work by competing with arachidonic acid in inflammatory pathways. This shifts prostaglandin production toward less inflammatory compounds and may help reduce overall disease activity.

Good dietary sources include salmon, sardines, mackerel, anchovies, and herring. Eating oily fish two to three times weekly can provide meaningful amounts of EPA and DHA. Always discuss supplements with a rheumatologist before starting them, particularly if you take blood thinners or other medications.

Read More: Which Foods To Avoid With Rheumatoid Arthritis

The Gut Microbiome and RA: Emerging Evidence Worth Knowing

Research into the gut microbiome and rheumatoid arthritis has expanded significantly in recent years. Studies suggest that alterations in gut bacteria may occur before RA develops in some individuals.

Recent studies have also observed links between microbiome composition and disease activity among people already living with RA. Although microbiome-focused therapies are not yet considered standard RA treatment, dietary patterns that support a healthy gut appear promising.

High-fiber foods, diverse plant foods, legumes, fruits, vegetables, and fermented foods may help support microbial diversity and lower inflammatory markers. These findings provide additional support for the Mediterranean dietary pattern, which naturally promotes a healthier gut environment while supplying anti-inflammatory nutrients.

Read More: Scientists Have Identified the Causative Gene Behind Rheumatoid Arthritis – Study Shows Evidence

Diet is not a cure for rheumatoid arthritis, but it can play a meaningful role in comprehensive disease management. The most important shift is away from focusing on single foods and toward adopting an overall anti-inflammatory eating pattern.

Reducing ultra-processed foods, added sugar, and excess red meat while increasing vegetables, legumes, olive oil, and omega-3-rich fish may help support lower inflammation. For most people with RA, the Mediterranean diet provides the most practical and evidence-based framework to complement prescribed treatment and support long-term health.

Q. Should people with RA avoid gluten?

Not unless they also have confirmed celiac disease or another medically diagnosed gluten-related condition. If symptoms consistently worsen after eating gluten-containing foods, discuss testing for celiac disease, including an anti-tTG IgA blood test, with your healthcare provider before eliminating gluten.

Q. What is the best diet for rheumatoid arthritis?

The Mediterranean diet has the strongest evidence base for rheumatoid arthritis. It emphasizes vegetables, fruit, legumes, fish, olive oil, nuts, and whole grains while limiting ultra-processed foods, added sugar, and processed meat. It is practical, sustainable, and does not require extreme food restrictions.

Q. Can omega-3 fish oil help with rheumatoid arthritis?

Yes. Omega-3 supplementation has the strongest evidence among individual nutrients studied for RA. Typical study doses range from 2,000 to 3,000 milligrams of combined EPA and DHA daily. Always discuss supplementation with your rheumatologist before starting, especially if you take blood thinners or immunosuppressive medications.

• Mar 2017
  Written by Pradeepa Polineni
• Jun 2026
  Edited by Vaishnavi