The Autoimmune Protocol Diet (AIP Diet) is an elimination-style eating approach that some people use as a structured way to explore how different foods may affect how they feel (5). It typically involves removing certain foods for a period of time and then reintroducing them one by one to identify which foods may not feel like a good fit for you, which can vary by person. During the elimination period, people often focus on simple, minimally processed foods and a consistent routine. If you have a medical condition or ongoing digestive concerns, it’s best to consult a healthcare professional before making major dietary changes.
Your immune system helps protect your body from everyday external threats, such as certain germs. This process is part of normal body function.
In autoimmune conditions, the immune system may respond in a way that affects the body’s own tissues (1).
The causes of autoimmune conditions are still being studied. Researchers have explored a mix of factors, including genetics, environment, infections, and stress, among others (1).
Some people who follow the AIP diet do so as a structured elimination-style approach to explore how certain foods may affect how they feel. Responses can vary from person to person.
Some autoimmune conditions are often discussed in relation to the AIP diet (1). This is informational only and not medical advice:
People who are pregnant, lactating, underweight, or malnourished may find highly restrictive diets inappropriate. If you’re considering an elimination diet, it’s best to consult a healthcare professional before making major dietary changes, as restrictive diets may not be appropriate for everyone.
There are two phases that will be covered here:
The elimination phase is a temporary period where some people choose to remove certain foods from their routine to observe how different foods may affect how they feel (5).
During this time, foods like eggs, dairy, gluten, nuts, seeds, nightshade vegetables (like peppers and tomatoes), coffee, and tea are commonly avoided. Some people also choose to simplify other variables during this phase.
While doing this, people often focus on fresh, nutrient-dense foods that are rich in antioxidants. The length of the elimination phase can vary, and many sources describe ranges like 30–90 days (5). Because elimination diets can be restrictive, it’s best to consult a healthcare professional before making major dietary changes, and to make sure you’re still meeting your nutrient needs.
Read More: 6 Food Elimination Diet: How To Do It Correctly And Identify Your Triggers
After the elimination phase, some people choose to reintroduce foods gradually to observe how different foods may affect how they feel.
During this time, foods that were previously removed are typically added back in one at a time, often with a few days in between. If you notice a food doesn’t feel like a good fit for you, you may choose to pause it and try again later.
This process can be useful for anyone who wants to better understand personal preferences and tolerance, and it can add flexibility over time.
Here’s a step-by-step approach some people use during the reintroduction phase:
Because elimination diets can be restrictive and individual needs vary, it’s best to consult a healthcare professional before making major dietary changes, especially if you have a medical condition or take medications.
The AIP diet is a highly restrictive eating approach, so here are examples of foods that are commonly included and commonly avoided during the elimination phase. Individual needs vary, so it’s best to consult a healthcare professional before making major dietary changes.
During the elimination phase, these foods are commonly avoided:
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During the elimination phase, these foods are commonly included:
Research on the AIP diet is limited, and people’s experiences can vary. Some people choose this elimination-style approach as a structured way to explore how different foods may affect how they feel.
The elimination phase typically removes several common food groups for a period of time, then reintroduces them gradually. Some people use this structure to better understand which foods feel like a good fit for them (5).
For some people, a structured reintroduction phase can make it easier to notice patterns in how they feel after certain foods (7, 8). If you have a medical condition or concerns, or you’re considering a restrictive diet, it’s best to consult a healthcare professional before making major dietary changes.
Furthermore, research on the AIP diet is still limited, and more high-quality studies are needed (4).
Some people focus on eating patterns that emphasize minimally processed foods, fiber-rich ingredients, and balanced meals as part of a general wellness routine.
A number of health topics are often discussed in relation to long-term inflammation, but the science is complex and varies by individual (3). A restrictive elimination diet is not necessary or appropriate for everyone. For those looking for a more balanced, less restrictive approach, eating patterns like the Mediterranean, DASH, and MIND diets emphasize variety and whole foods and are popular options to explore.
Read More: Elimination Diet: The Answer To All Your Tummy Troubles
If you’re new to this approach, many versions start by temporarily removing a few commonly avoided foods—such as gluten, dairy, eggs, soy, and corn—to keep the first phase simple and consistent. Some people find it helpful to follow a structured menu for a few days to a week.
After the elimination phase, foods are typically reintroduced gradually, one at a time, with a few days in between, while paying attention to how you feel. This process can take weeks or longer and may vary from person to person. Because elimination diets can be restrictive, it’s best to consult a healthcare professional before making major dietary changes.
This 7-day meal plan is an example of an elimination-style menu. It avoids grains, eggs, legumes, dairy, nuts, and other foods that are commonly excluded during the elimination phase.
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There are several challenges you may encounter while following the AIP diet:
The autoimmune protocol can be a significant commitment. It is very restrictive and may be difficult to follow, especially since many versions avoid grains, legumes, dairy, eggs, nuts, or soy.
Social situations can also be challenging. Since many restaurants use ingredients like corn, soy, and peanuts, it may be harder to find options that fit your preferences while eating out with friends or family.
At least initially, it can be more expensive than other eating approaches since many staple foods may be limited.
Because the elimination phase removes many food groups, it may be harder to meet all of your nutrient needs, especially when you also factor in tastes and availability. If you’re considering a restrictive elimination diet, it’s best to consult a healthcare professional or a registered dietitian to make sure your approach is appropriate for you and nutritionally balanced.
There are a few things to keep in mind if you’re trying an elimination-style eating approach.
How you feel day to day can be influenced by many factors, not just food. For example (10):
Regular physical activity can support mood and stress management, and it may help you feel more energized over time (6). Choose an intensity that feels sustainable for you.
Many adults aim for around seven hours of sleep per night. Consistent sleep can support energy, mood, and overall wellbeing (2).
Vitamin D is an important nutrient that supports overall health. People get vitamin D from foods, supplements, and sunlight, but individual needs can vary (11). If you’re considering supplements, especially in higher doses, it’s best to consult a healthcare professional.
Some people choose to use supplements alongside restrictive eating approaches to help cover potential nutrient gaps. Whether you need supplements depends on your diet, lifestyle, and individual needs.
If you’re considering supplements, it’s best to consult a healthcare professional, especially if you’re on medications, pregnant, or managing a health condition.
Some commonly discussed options include omega-3 supplements, probiotics, or other products depending on your goals and preferences (12).
It can take time to adjust to any new routine. You may not notice changes right away, and experiences can vary from person to person. If you’re not feeling well or have ongoing concerns, consider speaking with a healthcare professional.
If you’re considering an elimination-style approach because you feel certain foods don’t sit well with you, the AIP diet is one structured method some people use to explore personal food preferences and tolerance over time. It can be time-consuming and challenging at first, and experiences vary from person to person. Because elimination diets are restrictive, it’s best to consult a healthcare professional before making major dietary changes.
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