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Autoimmune

Your Definitive Guide To The AIP Diet + How It Can Help Manage Your Symptoms

Published June 5, 2026  •  7 minutes read
Avatar Of Dr. Will ColeWritten By: Evidence-Based Reviewed Article

The Autoimmune Protocol diet, or the AIP diet for short, is a diet designed to help lower inflammation and alleviate symptoms in people diagnosed with autoimmune diseases, such as rheumatoid arthritis or lupus.

In my telehealth functional medicine clinic, I often use the AIP diet as a baseline for many of my patients who come to me with inflammatory, autoimmune symptoms like joint pain and I have found it to be extremely beneficial at helping relieve them from symptoms they have been struggling with for years.

How does the AIP diet work?

In order to understand how the AIP diet works, we first need to understand autoimmunity.

In autoimmune conditions, it is believed that a genetic weakness is triggered by an immune response to toxins such as food proteins leaking into the bloodstream through a compromised gut lining or chronic viral, bacterial, yeast, or parasitic infections

All of these involve out-of-control inflammation which is an immune system trigger. This inflammatory-immune response can both cause and increase intestinal permeability — also known as leaky gut syndrome — further perpetuating the inflammatory-immune cycle.

Since certain foods can contribute to gut permeability and drive-up inflammation in people with autoimmune disorders, the AIP diet aims to remove all of these foods in favor of nutrient-dense food sources that promote gut health.

Typically, the autoimmune protocol diet plan happens in two phases — the elimination diet phase and the reintroduction phase.

Phase 1: Elimination

This elimination phase is the core of the AIP diet. This is when you take out all of the potentially triggering foods and focus on the nutrient-dense foods you can eat on the list of allowed foods.

Phase 2: Reintroduction

After a set time period of eating only the AIP diet allowed foods, you can then reintroduce certain foods — starting with the least likely to trigger inflammation to the most likely — in order to see what your body can handle and what it can’t.

The goal of these two phases of the AIP diet is to give your body time to heal before reintroducing foods to see what foods trigger inflammation and which foods don’t. This gives you a clear idea of what foods aggravate your symptoms and which ones don’t. The reintroduction phase is going to look different for each individual since everyone’s body reacts differently to different foods. 

Ultimately, the AIP diet is just as much about the foods you do eat as it is about the foods you don’t eat. For example, if you aren’t actively fueling your gut with foods that can heal it, inflammation and gut permeability will still remain even after a prolonged period of eliminating certain foods.

I have personally seen the AIP diet be a successful tool in relieving symptoms of various autoimmune conditions including IBD, Hashimoto’s thyroiditis, Crohn’s disease, and ulcerative colitis.

That’s why I wrote my book, The Inflammation Spectrum®. In it, I explain how inflammation is at the core of most common health woes and exists on a continuum: from mild symptoms such as weight gain and fatigue on one end, to hormone imbalance and autoimmune conditions on the other. How you feel is constantly and dynamically being influenced by every meal, and my book shows you how to get on the right path toward food freedom and overall healing.

Is the AIP diet and the paleo diet the same?

The AIP diet and paleo diet are similar when you look at what foods you are allowed to eat. Both diets put a major focus on eating clean, whole foods while avoiding refined sugar, highly processed foods and artificial food additives. The biggest difference between the AIP diet and the paleo diet is that the autoimmune protocol eliminates even more inflammatory foods that tend to be irritating to the gut in those with autoimmune conditions.

What foods are allowed on the AIP diet? 

While it may seem restrictive at first, there are actually a lot of foods that you can eat on the AIP diet, especially when you are creative with cooking and how you prepare these foods. There are also a lot more brands that have started creating AIP-friendly products.

Animal protein: All types of beef, poultry, organ meats, and game. Organic, grass-fed is preferred.

Seafood/shellfish: All types of seafood and shellfish

Vegetables: Any and all vegetables, leafy greens, raw or cooked (with the exception of the nightshade vegetables listed below)

Fruit: Any and all fruit, raw or cooked (with the exception of nightshades listed below)

Natural sweeteners: Dates, 100% fruit juice, pure maple syrup, and raw honey (all in moderation)

Oils: Avocado oil, coconut oil, and olive oil

Grain-free flours: Almond (in moderation), coconut, cassava

Herbs and spices: With the exception of nightshades listed below

Tea

Bone broth

Dairy alternatives: Ghee and coconut milk

Fermented foods: Sauerkraut, coconut kefir, nightshade-free kimchi, and kombucha which provide a natural probiotic boost.

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What foods are not allowed on the AIP diet?

Remember, we aren’t just eliminating foods for the sake of being restrictive. Each one of these foods has been linked to possible inflammatory responses in those with autoimmune conditions. The goal is to facilitate healing to a point where some of these foods can be reintroduced to your regular diet. But in order to discover what foods love you back, you need to cut them out for a little bit.

Legumes: Peanuts, black beans, chickpeas, kidney beans, lentils, soy, and soy-based products

Due to their lectin and phytate content they can be difficult to digest and are hard on your gut while it is trying to heal.

Nuts and seeds: Chia seeds, hemp seeds, walnuts, almonds, cashews, etc. along with nut-based butters, flours, and oils

These are often coated in inflammatory oils that flare-up autoimmune symptoms and can be difficult to digest.

Eggs: Even though eggs are super nutrient-dense with 6g of protein and 5g of fat, egg whites contain a compound called albumin that can cause reactions for people with autoimmune conditions.

Dairy: Cheese, yogurt, ice cream, milk, butter, cream, and any other product containing cow or sheep’s milk

Nightshades: White potatoes (though sweet potatoes are allowed), tomatoes, peppers, eggplant, goji berries, okra, tomatillos, paprika, cayenne pepper, ashwagandha

This group of botanical plants contains compounds known as alkaloids that can contribute to inflammation and symptom flare-ups in those struggling with autoimmune conditions. 

Gluten: Wheat, barley, rye, and any products made from these ingredients including flour, bread, and pasta

Gluten-free grains: Rice, quinoa, oats, sorghum, buckwheat, corn

Since the protein in these grains is so similar to gluten, an overactive immune system may mistake them for gluten and begin an attack.

Sugar and artificial sweeteners: Cane sugar, sugar in the raw, turbinado, corn syrup, aspartame, stevia, monk fruit, brown rice syrup, and any products with the addition of these sweeteners

Inflammatory oils: Vegetable, canola, corn, soybean, safflower, rice bran, and grapeseed

Chocolate

Alcohol

Coffee

LISTEN: Danielle Walker: Your Guide to Healthy Meal Prep & Autoimmune Healing Pro-Tips

How long should you do the AIP diet?

How long you should do the AIP diet depends on your individual health case. There is no one-size-fits-all when it comes to your health. Since your biochemistry is different from anyone else’s, how you respond to a particular diet is going to differ even if you have the same diagnosis.

On average, the AIP diet should last a minimum of 90 days before you can start reintroducing certain foods back into your diet. However, if you are more sensitive it may take longer to reintroduce foods back into your diet depending on your level of gut permeability and inflammation.

How can you tell if the AIP diet is working?

You can tell the AIP diet is working by a reduction in symptoms. Although autoimmune conditions never completely disappear, you can put symptoms into remission and minimize flare-ups by focusing on healing your gut and driving down inflammation with an autoimmune diet protocol.

You also have to remember that healing takes time. You should notice an improvement in symptoms of some sort after a couple weeks, with more and more improvements the longer you follow the AIP diet as you work toward long-term, sustainable healing and better quality of life.

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Other factors to consider

When looking at the AIP diet, we also have to take into account bio-individuality — the concept that everyone’s biochemistry is completely different even if diagnoses are the same. Some people have specific food allergies/sensitivities, take certain medications, or have a higher level of physical activity that needs to be considered while on the AIP diet.

You still have to look at these factors and tailor the AIP diet to fit within each person’s particular parameters. Functional medicine understands the importance of bio-individuality, and works to leverage the AIP diet to fit your individual health needs and goals — not forcing the AIP diet to work for you.

READ MORE: The #1 Diet For Autoimmunity + What To Do If It Doesn’t Work, According to A Functional Medicine Expert

Taking a holistic approach to autoimmune health

In functional medicine, we realize that there is more to health than diet alone. We aim to look at the entirety of your health case and consider other factors that play a role in your inflammation levels and autoimmune condition such as:

Sometimes, it takes certain lifestyle changes and targeted supplements to address these other triggers in addition to an AIP diet for a well-rounded, holistic approach to healing. 

With over a decade of specializing in autoimmune conditions, it is my job to get to the root cause of why you feel the way that you do. By uncovering underlying issues and customizing a plan to lower inflammation in conjunction with dietary changes like the AIP diet, you can be on your way to a life free from autoimmune flare-ups.

As one of the first functional medicine telehealth clinics in the world, we provide webcam health consultations for people around the globe.

Photo: Unsplash.com

1. What is the AIP diet?

The Autoimmune Protocol (AIP) diet is designed to help reduce inflammation and support gut health in people with autoimmune conditions. It works in two phases: first, potentially inflammatory foods are removed while focusing on nutrient-dense, gut-supportive foods; then foods are gradually reintroduced to identify personal triggers. The goal of the AIP diet is to help calm the immune response, support healing of the gut lining, and better understand which foods may worsen symptoms.

2. What foods can you eat on the AIP diet?

Foods allowed on the AIP diet include high-quality animal proteins, seafood, vegetables and fruits (excluding nightshades), healthy fats like olive, avocado, and coconut oil, and grain-free flours such as coconut and cassava. You can also have nutrient-dense superfoods like bone broth, fermented foods, herbal teas, and dairy alternatives such as coconut milk and ghee. Natural sweeteners like raw honey and maple syrup are also allowed in moderation.

3. What foods are not allowed on the AIP diet?

Foods not allowed on the AIP diet include legumes, grains (including gluten-free grains), dairy, eggs, nuts and seeds, nightshade vegetables and spices, refined sugars, artificial sweeteners, inflammatory oils, alcohol, coffee, and chocolate.

4. Who can benefit from an AIP diet?

An AIP diet is designed to benefit anyone with an autoimmune condition by lowering inflammation that contributes to symptoms. But you don’t necessarily have to be diagnosed with an autoimmune disease to benefit from doing an AIP diet. If you are struggling with ongoing inflammatory symptoms like gut irritation (bloating, constipation, etc.), brain fog, or skin skin problems, an elimination style, AIP diet could potentially be beneficial.

The information on this website has not been evaluated by the Food & Drug Administration or any other medical body. We do not aim to diagnose, treat, cure or prevent any illness or disease. Information is shared for educational purposes only. You must consult your doctor before acting on any content on this website, especially if you are pregnant, nursing, taking medication, or have a medical condition.

Our content may include products that have been independently chosen and recommended by Dr. Will Cole and our editors. If you purchase something mentioned in this article, we may earn a small commission.

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