
An elimination diet is a meal plan that helps you identify food intolerances, allergies, and sensitivities. It involves removing a food or group of foods from your diet for a set period, typically between 4 and 8 weeks, to see if your symptoms improve. Elimination diets are often used to reduce symptoms of IBS, ADHD, eczema, and migraines. They can also help identify food triggers for digestive issues and skin conditions. It is important to note that elimination diets should be followed under the guidance of a medical professional or dietitian to ensure you still receive proper nutrition and to avoid potential health risks.
| Characteristics | Values |
|---|---|
| Purpose | To help identify food intolerances, sensitivities, and allergies |
| Who should try it | People with frequent tummy troubles, IBS, ADHD, eczema, or chronic migraines |
| Who should not try it | Children, people with serious food allergies, or those with a history of severe allergic reactions |
| Diet type | Excludes foods with the most common allergens, e.g., milk, eggs, tree nuts, peanuts, wheat, soy, fish, and shellfish |
| Time period | 4-8 weeks |
| Food journal | Yes, to document what you eat and how it affects you |
| Supervision | A medical professional or registered dietitian |
| Risks | May cause nutrient deficiencies, especially if followed for too long |
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What You'll Learn

Consult a medical professional
Consulting a medical professional is highly recommended before starting an elimination diet. This is especially important if you are experiencing severe symptoms, as they can provide a thorough examination and determine if any underlying medical issues are causing your symptoms. A medical professional can also advise on any required blood or allergen tests.
Registered dietitians and physicians can help create a tailored elimination diet plan based on your symptoms, health history, and any diagnoses. They can advise on which foods are likely to be your trigger foods, ensuring you remove only the necessary items from your diet. This can help to reduce the risk of nutritional deficiencies, as a professional can guide you in maintaining a balanced and nutritional diet.
If you have a known or suspected food allergy, it is essential to consult a doctor before starting an elimination diet, as reintroducing a food allergen can trigger anaphylaxis. Elimination diets can be beneficial for those with IBS, ADHD, migraines, and skin conditions like eczema, but they should be approached with caution. For example, children should only follow an elimination diet under medical supervision, as these diets restrict many essential nutrients required for growth.
Even if you are not experiencing severe symptoms, it is beneficial to consult a medical professional or registered dietitian when considering an elimination diet. They can provide guidance and support throughout the process, helping you to identify trigger foods accurately and maintain a balanced diet. This can increase your chances of success and ensure you do not miss any underlying issues.
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Identify trigger foods
An elimination diet is a great way to identify food intolerances, sensitivities, and allergies. It is a controlled experiment that focuses on changing a single dietary variable at a time. It is important to know the difference between a food allergy and a food intolerance. Symptoms like constipation, headaches, heartburn, fatigue, bloating, or trouble swallowing may signal a food intolerance.
There are many types of elimination diets, but they all involve eating or removing specific foods. Elimination diets are individualized based on each patient's history, eating patterns, and overall symptom picture. A thorough dietary history, which may include a food journal, can help assure clinicians that food restrictions will not contribute to nutrient deficiencies or inappropriate weight loss. A dietitian will do a comprehensive nutrition assessment and a nutrition-focused physical exam to assess for malnutrition and nutritional deficiencies.
During an elimination diet, you stop eating one or more potential problem foods for several weeks. You will keep a food journal to document what you eat and how it affects you. As you slowly reintroduce those foods into your diet, you keep track of how you feel as they return. The entire process, including elimination, takes roughly 5–6 weeks.
The most common food allergy triggers are wheat (including gluten items) and dairy. However, you should only eliminate dairy products temporarily, as you will want to look for foods that are fortified with calcium. For example, soy can be a good source of calcium, but check to see if it is allowed on your plan.
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Remove trigger foods
The elimination diet is designed to help you identify trigger foods that may be causing symptoms such as bloating, diarrhoea, constipation, headaches, heartburn, fatigue, and more. It is recommended that you seek guidance from a medical professional before starting an elimination diet, as you could have an underlying medical problem that requires treatment.
Registered dietitian Sharon Jaeger recommends working with a professional to create a tailored elimination diet plan based on your symptoms, health history, and any diagnoses you might have. You don't need to remove every possible trigger food. Jaeger suggests that you remove a certain set of foods for a period of about four to eight weeks. This is enough time to allow your body to respond.
During the elimination phase, you should stop eating one or more potential problem foods. Foods that are commonly removed include citrus fruits, nightshade vegetables, nuts and seeds, legumes, starchy foods, meat and fish, and dairy products. It is important to note that you should not eliminate all these food groups unless advised by a medical professional, as it may lead to nutritional deficiencies.
After the elimination phase, you move on to the reintroduction phase. During this phase, you slowly bring eliminated foods back into your diet, introducing each food group individually over two to three days while monitoring for any adverse symptoms. If you experience symptoms, you have identified a trigger food and should remove it from your diet.
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Keep a food journal
Keeping a food journal is an essential part of an elimination diet. It is a controlled experiment that focuses on changing a single dietary variable at a time, and the food journal helps to keep track of the results of these changes. The journal will document what you eat and how it affects you.
Before starting an elimination diet, it is important to consult a medical professional or dietitian, who can help to determine which foods are likely to be your trigger foods, creating a tailored plan that is designed to be effective and easy for you to follow. They will take into account your symptoms, health history, and any diagnoses you might have.
A food journal will help you to keep track of the food you eat and the effects it has on your body. It is a way to record your dietary intake and any symptoms you experience, which can help you identify patterns and problem foods. You should record all the food you eat, including ingredients and portion sizes, and note how you feel after eating, including any physical or mental symptoms.
The food journal will also help you to stay motivated and on track with your elimination diet. It can be a useful tool to refer back to, to see what foods you have already eliminated and how your body responded. This can help you to identify patterns and make connections between your dietary choices and your health.
Finally, the food journal can be a valuable record to share with your healthcare provider, who can use the information to assess your progress and make any necessary adjustments to your elimination diet plan. It is a way to ensure that you are getting all the nutrients you need and that the diet is working effectively for you.
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Reintroduce food groups
Reintroducing food groups after an elimination diet can be a challenging process, both physically and mentally. It is important to remember that the elimination diet is not a long-term solution, and food groups should be reintroduced after a period of 4 to 8 weeks.
The reintroduction phase is a critical part of the elimination diet, as it helps identify trigger foods and food intolerances. During this phase, it is recommended to introduce one food group at a time over a period of 2 to 3 days. This gradual approach allows for careful monitoring of any adverse symptoms, such as bloating, stomach cramps, or diarrhoea. If symptoms reoccur, the food group is considered a trigger and should be avoided.
It is important to seek professional guidance, especially when dealing with auto-immune conditions or specific health concerns like IBS. A dietitian or physician can provide tailored advice and support throughout the reintroduction process, ensuring a safe and effective approach. They can also help address any anxiety or fear of food that may develop during the elimination diet.
When reintroducing food groups, it is essential to consider your overall diet and nutritional needs rather than focusing solely on the foods you have missed. A diverse diet that includes a good balance of fats, proteins, and carbohydrates is key to maintaining a healthy body and mind. Additionally, it is recommended to be in a good mental space and to avoid times of stress when reintroducing foods, as stress can negatively impact digestion and lead to bloating and gas.
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Frequently asked questions
An elimination diet is a way of discovering which foods cause inflammation and other adverse reactions in your body. It involves removing a food or group of foods from your diet for a set period, usually between 4 and 8 weeks, and then reintroducing them to see if symptoms return.
It is important to consult a medical professional before starting an elimination diet, as they can advise on which foods are likely to be causing issues based on your symptoms, health history, and any diagnoses you have.
An elimination diet can help identify trigger foods that cause symptoms such as bloating, stomach cramps, gas, and diarrhea. It has also been shown to reduce symptoms of conditions such as IBS, eosinophilic esophagitis (EE), ADHD, eczema, and chronic migraines.
Yes, elimination diets can lead to nutrient deficiencies, especially if followed for longer than the recommended time frame. Children and people with known or suspected allergies should only attempt an elimination diet under the supervision of a doctor.











































