When I removed gluten and dairy from my diet, my inflammation dropped significantly. But there was still something quietly working against me — and I didn’t find it until I looked at what I was cooking with.

The oils in your kitchen might be the most overlooked driver of autoimmune inflammation. Most people never think twice about them. They grab whatever is cheapest, or whatever sounds “healthy” on the label. But for people with lupus, RA, Hashimoto’s, or any other autoimmune condition, the oils you cook with can make a real difference in your symptom burden.

Here’s what I learned — and the simple swaps I made that have stayed in my kitchen ever since.

Why Cooking Oils Matter for Autoimmunity

Not all fats are created equal. Some oils — specifically those high in omega-6 polyunsaturated fatty acids (PUFAs) — promote inflammation when consumed in excess. Others are rich in anti-inflammatory compounds that can help calm an overactive immune system.

The problem? Modern Western diets are massively skewed toward omega-6-heavy seed oils: soybean oil, corn oil, sunflower oil, safflower oil, canola oil, and vegetable oil. These oils are in nearly everything processed — and many people cook with them at home too.

When the omega-6 to omega-3 ratio in your body gets too high (ideally it should be around 4:1; most Americans are closer to 20:1 or even 40:1), it activates inflammatory pathways that can trigger and worsen autoimmune symptoms. Research published in Nutrients (2021) found that dietary fat composition significantly influences the activity of inflammatory mediators associated with autoimmune conditions.

I’m not here to tell you a single oil swap will cure your autoimmune disease. It won’t. But removing a chronic, daily source of inflammatory fuel — and replacing it with something that supports your body instead — is one of the simplest, most sustainable changes you can make.

The Swaps That Made a Difference for Me

I didn’t overhaul my kitchen overnight. I made one swap at a time, starting with whatever I used most. Here’s what I actually cook with now — and why.

🫒 Extra Virgin Olive Oil — My Everyday Workhorse

This is the one I reach for most. Cold-pressed extra virgin olive oil (EVOO) is loaded with oleocanthal, a natural compound with anti-inflammatory properties similar to ibuprofen at therapeutic doses (Beauchamp et al., Nature, 2005). It’s also high in oleic acid, a monounsaturated fat that doesn’t oxidize easily.

I use it for sautéing at low-to-medium heat, salad dressings, roasting vegetables, and drizzling over finished dishes. The key is getting real EVOO — not the blended stuff that’s often cut with cheaper seed oils.

🥥 Coconut Oil — for High-Heat Cooking

Coconut oil is highly saturated, which actually makes it stable at high heat — unlike seed oils which oxidize and produce harmful byproducts when overheated. I use it for stir-frying, searing, and baking at higher temperatures.

The medium-chain triglycerides (MCTs) in coconut oil may also support gut health and immune function — areas of active research in autoimmune disease management. Look for unrefined, cold-pressed virgin coconut oil rather than refined versions that have been processed with heat or chemicals.

🥑 Avocado Oil — the High-Heat Hero

If I had to pick one oil for everything, avocado oil might be it. It has the highest smoke point of any common cooking oil (around 500°F/260°C), making it ideal for searing, roasting, grilling, and even frying. It’s rich in oleic acid (like olive oil) and vitamin E, both of which support immune regulation.

I use avocado oil when I need to cook something at high temperature and don’t want the flavor of coconut oil. It’s also great for homemade mayonnaise if you’re avoiding seed oil-based mayo (which is almost all commercial mayo).

Quick-Reference Swap Table

What About Butter and Ghee?

If you tolerate dairy (or clarified dairy), grass-fed butter and ghee are excellent cooking fats. They’re rich in butyrate, a short-chain fatty acid with documented anti-inflammatory effects on gut health. Ghee is butter with the milk solids removed, making it suitable for many people who are dairy-sensitive (including some people with autoimmune conditions).

I personally use ghee regularly for cooking eggs, sautéing vegetables, and adding richness to sauces. Fourth & Heart and Ancient Organics are two brands I trust.

The Bottom Line

You don’t have to throw out everything in your kitchen today. Start with the oil you use most — probably the one sitting on your stovetop — and swap it for avocado oil or extra virgin olive oil. That single change, repeated at every meal, adds up fast.

I made this swap about a year into my autoimmune journey, and it’s one of those quiet changes that I believe contributed to my overall improvement. Not dramatic. Not a cure. But consistent, low-effort, and real.

If you want more of these simple swaps — the ones that actually fit into a real life with autoimmune disease — I share them regularly in the blog and on the podcast. And if you’re looking for where to get started, the Warrior Toolkit has a full list of the products I personally use and trust.

One swap at a time. That’s how we do this.

Have you already swapped out seed oils? What did you notice? Drop it in the comments — I read every single one.

Sources: Beauchamp et al. (2005). Phytochemistry: Ibuprofen-like activity in extra-virgin olive oil. Nature. | Simopoulos, A.P. (2002). The importance of the ratio of omega-6/omega-3 essential fatty acids. Biomedicine & Pharmacotherapy. | Gioxari et al. (2018). Intake of omega-3 polyunsaturated fatty acids in patients with rheumatoid arthritis. Nutrition.

Disclaimer: This post is for informational purposes only and is not medical advice. Always consult your healthcare provider before making dietary changes. This page contains affiliate links — they won’t change your price, but we may earn a small commission. As an Amazon Associate, we earn from qualifying purchases.