Foods to avoid with Rheumatoid Arthritis (RA)

For rheumatoid arthritis, guidance focuses on fat quality and inflammatory load rather than a single trigger. Trans fats, hydrogenated oils and high-sugar sweeteners are the most consistently flagged, while omega-3 rich fish and whole foods tend to be favoured for joint inflammation.

Commonly asked about

All RA ingredients (32)

Avoid during a flare (5)

Limit or use with caution (27)

How diet fits with rheumatoid arthritis

What the research can and cannot say

No diet has been shown to replace treatment for rheumatoid arthritis. The Arthritis Foundation describes a Mediterranean-style, anti-inflammatory eating pattern with cold-water fish such as salmon, sardines and herring as a good choice, and the National Institute of Arthritis and Musculoskeletal and Skin Diseases emphasizes a healthy, balanced diet for overall health. Studies of the Mediterranean diet in rheumatoid arthritis have been small and the evidence is generally low, so it is reasonable and low-risk, but not proven to change the disease.

Why fat quality and sweeteners come up

Guidance for rheumatoid arthritis focuses more on the overall pattern than on one trigger. Trans fats and hydrogenated oils are consistently flagged because of their effect on cholesterol and general health, high-sugar sweeteners are cautioned during active disease, and omega-3-rich fish is generally favored. The entries in this guide explain each rating and give the label names for the ingredient.

Flare versus remission

Ratings differ between a flare and remission, since some ingredients are worth limiting while joints are inflamed and are fine when the disease is quiet. Because medications used for rheumatoid arthritis can affect nutrition and appetite, your rheumatologist or a dietitian can advise on what suits you, particularly before taking fish oil or other supplements.

How to use this guide

Use the guide as background for a conversation with your care team. It is general information based on published guidance and does not tell you what to eat.

Questions to ask your care team

Useful questions include whether your medication interacts with any food or supplement, whether fish oil is appropriate alongside it, how to keep a healthy weight when joints limit activity, and whether a referral to a registered dietitian is available. If you keep a symptom diary, note what you ate and how your joints felt, so that patterns are easier to discuss.

Choosing fish

If you follow the Mediterranean-style advice to eat more fish, the FDA and EPA best-choices list includes salmon, sardines, anchovies, pollock, shrimp, trout and canned light tuna, and advises avoiding the highest-mercury species such as king mackerel, shark and swordfish. Fish oil supplements are a separate question to raise with your rheumatologist, because they are studied differently from fish in the diet.

General guidance, not medical advice. Individual tolerance varies — talk to your clinician before changing your diet.

Check whole products for RA

Scan a barcode with FoodSage and every ingredient on the label is checked against Rheumatoid Arthritis (RA) — flare or remission. Learn about FoodSage.

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