What is an Elimination Diet?

An elimination diet is a type of restrictive diet that aims to identify the foods that may cause allergies, intolerance, and even sensitivities for specific individuals. This diet involves removing certain foods from your diet that are suspected to trigger your allergy or may affect your tolerance. This is typically done for 3 to 4 weeks, then gradually reintroducing food items while monitoring for symptoms. 

This technique has been used by allergists and registered dietitians for decades as it is a proven way to determine how each food item may affect a person with unknown dietary restrictions.  

How does an elimination diet work? 

Based on the name itself, this diet aims to eliminate particular food items that are known to trigger allergies, intolerance, and sensitivities. Once eliminated, the body may react to it if it contains allergens. You may start to feel better once you start consuming meals without that ingredient. If nothing changes, then it only means that you are not allergic, intolerant or sensitive to that food item.

Identifying and understanding the triggers of your allergies, intolerance, or sensitivities is a game-changer. This is the goal of the elimination diet. To fully understand how this diet works, here’s a comprehensive guide on how this is done:

Step 1. Identify suspected foods 

This first step is the most crucial in the elimination diet. This is where you take note of the suspected foods that cause the allergic reactions. Usually, people identify the following as possible causes for food allergies, sensitivities, or intolerance, such as processed foods, seafood, milk, eggs, sweets, certain vegetables, shellfish, nuts, soy products, and gluten-containing grains like wheat and barley. Some are also sensitive to additives including coloring, preservatives, and artificial sweeteners. 

Take note that not everyone may have the same food list that triggers them. Another thing, the food items listed above are only examples of what types of food cause allergies, intolerance, and sensitivities. 

This step requires close introspection to come up with your personalized list of trigger foods.

Step 2. Eliminating identified trigger foods

After coming up with your list of trigger foods, the next step is to steer clear from them for several weeks, typically 3-4 weeks. This is to give your body enough time to heal from the possible effects that these identified trigger foods may have caused. Let the inflammation subside during this time, ultimately achieving a clean slate from the triggers.

During this time, it is crucial that you still get sufficient nutrients from other food items that you can include in your diet. It is also important to read the labels of those processed foods that you believe are okay to consume and watch out for hidden ingredients that may cause your triggers. Some processed foods contain some common allergens. An example of this common allergen is soy which is present in some baked goods and sauces.

It is also beneficial to work with a professional dietitian to ensure that you’re getting sufficient nutrients while completely removing the suspected triggers of your allergies.

Step 3. Reintroduce foods 

After the elimination period, the foods are individually reintroduced into the diet. Each food is eaten in its pure form, and you need to monitor yourself for symptoms over a few days. This step should be done methodically and slowly.

Typically, you start by picking one food from your list of suspected triggers. You reintroduce it to your diet in a small amount and wait to see if any symptoms occur. If no symptoms appear after two to three days, you can assume that food is safe and move on to the next one.

During this phase, it’s important to only reintroduce one food at a time and to keep the rest of your diet consistent. This way, if symptoms do appear, it’s clear which food caused them.

Step 4. Monitor symptoms 

If symptoms reappear upon reintroduction, it suggests that the food is a trigger and should be avoided. These symptoms can range from digestive issues like bloating and diarrhea to skin reactions like rashes or eczema, or even mood changes. You may also experience discomfort and difficulty in breathing. Make sure that you can immediately seek out medical help if the symptoms become worse. 

Make sure that you write down any symptoms that occur during the reintroduction phase, even if they seem minor or unrelated. This information will be invaluable when it comes to identifying your food sensitivities or how each food item may or may not affect you. Reinterpreting these notes will rely greatly on the health experts, so just jot them down as accurately as possible. 

If no symptoms occur, the food can be reincorporated back into your normal diet. But keep in mind that some reactions may show up later than expected. So, while it may be okay to reintroduce these food items to your diet, make sure that you consume them sparingly and try not to be careless when eating them. Remember that continued monitoring is key. 

It’s also important that an expert dietitian or allergist is ready to assess these changes and possible symptoms, especially for those instances that appeared late. Make sure that your notes reflect these changes as well as the timeline these happened. 

The elimination diet is a powerful tool for identifying food sensitivities and allergies. However, it’s not a solution in and of itself. Once you’ve identified your trigger foods, the next step is learning how to manage your diet and lifestyle to avoid these triggers while still enjoying a varied and nutritious diet. This often requires ongoing support and guidance from healthcare professionals.