AIP Diet Food List — Your Complete Autoimmune Protocol Guide

What Is the AIP Diet?

The autoimmune protocol diet (AIP) is a specialized elimination diet designed to reduce inflammation, heal the gut lining, and identify food triggers in people living with autoimmune conditions. Rooted in the principles of the paleo diet but taken several steps further, the AIP diet removes foods known to irritate the gut, drive immune dysregulation, and contribute to systemic inflammation.^[1]

More than 80 autoimmune diseases affect an estimated 24 million Americans — conditions like Hashimoto's thyroiditis, rheumatoid arthritis, lupus, inflammatory bowel disease (IBD), and psoriasis. Research increasingly points to the gut as a central player in autoimmune pathology, with intestinal permeability (commonly called "leaky gut") acting as a gateway for environmental triggers that set off immune attacks on the body's own tissues.^[2]

The AIP diet works in two phases: an elimination phase that removes potentially problematic foods for a minimum of 30–90 days, followed by a systematic reintroduction phase where foods are added back one at a time to identify individual triggers. Clinical trials have demonstrated that this approach can achieve clinical remission in patients with active IBD and significantly improve quality of life.^[3][4]

Whether you're newly diagnosed or looking for a structured approach to manage symptoms, this AIP diet food list is your comprehensive roadmap — complete with what to eat, what to avoid, a printable grocery list, and practical tips for success.

The Science Behind the AIP Diet

Gut Health and Autoimmunity

The gut houses roughly 70% of the immune system. When the intestinal barrier becomes compromised — a condition researchers call increased intestinal permeability — undigested food particles, bacterial toxins, and other antigens can pass into the bloodstream. In genetically susceptible individuals, this triggers an immune response that can manifest as autoimmune disease.^[2]

The gut microbiome plays a critical role in maintaining barrier integrity. Dysbiosis (an imbalance in gut bacteria) has been consistently observed in patients with autoimmune conditions, and restoring microbial balance through diet is a key therapeutic target ^[5].^[5] This is where understanding the difference between prebiotics and probiotics becomes essential — both support the gut ecosystem in complementary ways.

What the Research Shows

The landmark 2017 study by Konijeti et al. at Scripps Clinic enrolled 15 patients with active IBD on the AIP diet. After an 11-week protocol (6-week elimination, 5-week maintenance), 73% of participants achieved clinical remission, with significant improvements in endoscopic findings and inflammatory biomarkers like fecal calprotectin.^[3]

Follow-up research showed the AIP diet significantly improved patient-reported quality of life across multiple domains, including physical functioning, emotional well-being, and social engagement ^[4].^[4] Further analysis revealed that the diet actually modified intestinal gene expression, downregulating inflammatory pathways at the molecular level.^[6]

Beyond IBD, a pilot study on Hashimoto's thyroiditis found that women following the AIP protocol for 10 weeks experienced significant improvements in quality of life and symptom burden, even though thyroid function markers (TSH, T4) remained stable — suggesting the diet's benefits extend beyond what standard lab tests capture.^[7]

A 2024 comprehensive review confirmed the AIP diet as a promising personalized elimination approach for autoimmune disease management, emphasizing its focus on gut health and the gut microbiome in immune regulation ^[1].^[1]

AIP Diet Food List: What You Can Eat

The elimination phase of the AIP diet focuses on nutrient-dense, anti-inflammatory whole foods. Despite the list of eliminations, there is an abundance of delicious foods you can enjoy. Here is your complete AIP grocery list:

Proteins

Vegetables

Fruits

Healthy Fats, Herbs & Pantry Staples

Omega-3 rich foods like wild-caught salmon and sardines deserve special emphasis. Research has demonstrated that omega-3 polyunsaturated fatty acids possess potent anti-inflammatory and immunomodulatory properties that may benefit autoimmune conditions ^[8].^[8]

Dr. Jeannisa Bowden, ND

Naturopathic Doctor · Whole-Person Autoimmune Care

AIP Diet Food List: What to Avoid

The elimination phase removes foods that are most commonly associated with gut irritation, immune activation, and increased intestinal permeability. This isn't about deprivation — it's a strategic reset to identify your personal triggers.

Your AIP Grocery List: A Practical Shopping Guide

Walking into the grocery store on an elimination diet can feel overwhelming at first. Here's a practical, organized AIP grocery list to make your shopping trips efficient:

Produce Section

• Greens: Spinach, kale, mixed salad greens, collard greens
• Cruciferous: Broccoli, cauliflower, Brussels sprouts
• Roots & Tubers: Sweet potatoes, beets, carrots, parsnips
• Aromatics: Onions, garlic, fresh ginger, fresh turmeric
• Other Veggies: Zucchini, cucumbers, celery, asparagus, butternut squash
• Fruits: Berries (mixed), avocados, lemons, limes, apples, bananas, plantains
• Fresh Herbs: Basil, cilantro, rosemary, thyme, parsley, mint

Protein Counter

• Wild-caught salmon and sardines (canned wild-caught works too)
• Grass-fed ground beef or steak
• Pasture-raised chicken (thighs and breasts)
• Bone broth (or bones for homemade)
• Organ meats: chicken liver, beef liver

Pantry Staples

• Extra virgin olive oil and coconut oil
• Coconut aminos (soy sauce replacement)
• Apple cider vinegar
• Coconut milk (full-fat, no additives)
• Cassava flour and arrowroot starch (for AIP baking)
• Collagen peptides
• Sea salt, turmeric, cinnamon, garlic powder

AIP Diet for Beginners: How to Get Started

If you're new to the autoimmune protocol diet, the key is to approach it as a phased journey, not a cold-turkey crash diet. Here's your step-by-step guide:

Phase 1: Preparation (1–2 Weeks Before)

• Audit your kitchen: Remove eliminated foods or move them to a separate area
• Stock your pantry: Use the AIP grocery list above to fill your kitchen with compliant options
• Meal prep basics: Cook large batches of bone broth, roasted vegetables, and proteins
• Start a food journal: Track what you eat, energy levels, digestion, and symptoms daily

Phase 2: Elimination (30–90 Days)

During this phase, strictly follow the AIP diet food list. Remove all foods from the "avoid" list. Most practitioners and researchers recommend a minimum of 30 days, though clinical trials typically use 6-week elimination periods ^[3].^[3] Some people benefit from extending to 60–90 days depending on symptom severity.

Focus on:

• Eating a wide variety of vegetables (aim for 8+ different types daily)
• Including high-quality protein at every meal
• Consuming fermented foods daily for gut health support
• Staying well-hydrated with water, herbal teas, and bone broth
• Prioritizing sleep (7–9 hours) and stress management alongside dietary changes

Phase 3: Reintroduction (Ongoing)

Once you've experienced meaningful symptom improvement, begin reintroducing eliminated foods one at a time, waiting 5–7 days between each new food. The order typically recommended:

1. Stage 1 (lowest risk): Egg yolks, seed-based spices, ghee, coffee
2. Stage 2: Nuts, seeds, cocoa, egg whites, grass-fed butter
3. Stage 3: Nightshades (start with cooked, peeled), legumes (lentils first)
4. Stage 4 (highest risk): Gluten-free grains, dairy, alcohol

If a reintroduced food triggers symptoms (bloating, joint pain, fatigue, skin flares, brain fog), remove it and try again in 1–3 months. Your body's response is the ultimate guide.

AIP Diet vs. Paleo: What's the Difference?

Since the autoimmune protocol diet is based on the paleo framework, many people wonder how they differ. While both diets eliminate grains, legumes, refined sugars, and processed foods, the AIP diet goes significantly further by also removing:

• Eggs — allowed on paleo but eliminated on AIP due to immune-reactive proteins in egg whites
• Nightshade vegetables — tomatoes, peppers, and potatoes are paleo-approved but removed on AIP because of their alkaloid content
• Nuts and seeds — a paleo staple, but eliminated on AIP due to phytic acid and potential gut irritation
• Coffee and chocolate — both are seed-derived and removed on the AIP elimination phase
• Seed-based spices — cumin, coriander, mustard, and black pepper are eliminated on AIP but fine on standard paleo

Think of AIP as paleo with therapeutic precision. The standard paleo diet is a healthy baseline for the general population, while the AIP diet is specifically calibrated for people with active autoimmune conditions who need a more aggressive approach to identifying immune triggers and restoring gut barrier function.

The good news? Many people who start on AIP are able to successfully reintroduce several of these foods during the reintroduction phase, effectively transitioning to a modified paleo-style diet that works for their unique biology.

How the AIP Diet Supports Gut Healing

The connection between gut health and autoimmunity is one of the most active areas of immunological research. The intestinal epithelial barrier — a single layer of cells held together by tight junction proteins — serves as the body's primary gatekeeper between the external environment and the immune system.^[2]

When this barrier is compromised by factors like chronic stress, poor diet, infections, or medication overuse, the resulting "leaky gut" allows large molecules to pass through and trigger immune activation. The AIP diet addresses this through multiple mechanisms:

• Removing irritants: Gluten, lectins, saponins, and alcohol are all associated with increased intestinal permeability
• Providing building blocks: Collagen-rich bone broth, glycine, and glutamine support epithelial cell regeneration
• Feeding beneficial bacteria: Prebiotic fibers from vegetables and fermented foods support a diverse, healthy microbiome — learn more about how prebiotics and probiotics work together
• Reducing inflammatory load: By eliminating processed foods and emphasizing omega-3-rich proteins, the diet shifts the body's inflammatory balance^[8]

Research in murine models and human studies alike confirms that restoring gut barrier integrity can reduce autoimmune symptom severity and even alter disease progression.^[5] For a deeper dive into nurturing your gut ecosystem, explore our comprehensive gut health resource hub.

A Sample Day on the AIP Diet

Eating AIP doesn't mean bland or boring. Here's what a typical day might look like:

• Breakfast: Sweet potato hash with ground turkey, sautéed kale, and avocado — cooked in coconut oil with turmeric and sea salt
• Lunch: Large mixed greens salad with grilled wild-caught salmon, roasted beets, shaved carrots, sliced cucumber, and olive oil-lemon dressing
• Snack: Bone broth with fresh ginger, or plantain chips with guacamole
• Dinner: Herb-roasted chicken thighs with roasted cauliflower, Brussels sprouts, and mashed sweet potato topped with coconut oil
• Dessert: Mixed berries with coconut cream and a sprinkle of cinnamon

Tips for Long-Term AIP Success

Beyond Food: The Lifestyle Component

The AIP protocol recognizes that diet alone isn't sufficient. The clinical trial on Hashimoto's thyroiditis incorporated lifestyle coaching alongside dietary changes, and researchers noted that this multi-disciplinary approach was key to the positive outcomes observed.^[7]

Essential lifestyle practices include:

• Sleep hygiene: Aim for 7–9 hours of quality sleep; poor sleep directly increases intestinal permeability
• Stress management: Chronic stress activates the gut–brain axis and compromises barrier function
• Movement: Regular moderate exercise (walking, yoga, swimming) supports immune regulation
• Social connection: Autoimmune conditions can be isolating; finding community (online AIP groups, working with a practitioner) makes the journey sustainable

Common Mistakes to Avoid

• Not eating enough: The AIP diet is nutrient-dense but can be lower in calories if you're not intentional. Eat generous portions of fats and proteins.
• Rushing reintroduction: Adding foods back too quickly makes it impossible to identify triggers. Patience here pays dividends.
• Ignoring nutrient variety: Don't eat the same 5 foods every day. Rotate proteins, vary your vegetable colors, and include organ meats for micronutrient density.
• Going it alone: Work with a naturopathic doctor or functional medicine practitioner who understands the AIP protocol for personalized guidance.

Can the AIP Diet Help With Autoimmune Disease?

The evidence is promising and growing. While larger randomized controlled trials are still needed, the existing research paints a compelling picture:

• IBD: 73% clinical remission rate in 11 weeks, with improvements sustained through the maintenance phase^[3]
• Hashimoto's: Significant quality-of-life improvements and reduced symptom burden in 10 weeks^[7]
• Gene Expression: The AIP diet modified intestinal RNA expression, shifting it toward anti-inflammatory patterns^[6]
• Quality of Life: Significant improvements across physical, emotional, and social well-being domains^[4]

The underlying mechanism connects to the gut–immune axis. By reducing intestinal permeability and restoring microbiome balance, the AIP diet addresses a root cause of autoimmune activation rather than merely suppressing symptoms.^[2][5]

It's important to note that the AIP diet is not a replacement for medical treatment. It works best as a complementary approach alongside conventional care, ideally supervised by a healthcare provider familiar with autoimmune nutrition.