How a simple tool like a 3 week elimination diet can reduce inflammation
by Dr. Shawna Darou, ND in Inflammation / Nutrition / Functional Medicine
Food is information, and when the body becomes out of balance in an inflamed state, the quality of food becomes even more critical.
I am a big fan of a food-first approach with health, because it is incredible the impact that dietary changes can make on symptoms like joint pain, migraines, fatigue, skin conditions, bloating, weight, and more. In fact, I often find greater symptom reduction with an anti-inflammatory diet compared to most supplements.
One key distinction with an elimination diet is that there is no calorie restriction or measuring portions. We first want to see what a change in diet does to your symptoms. This is actually the most accurate way to determine food triggers, because there is not one perfect test that picks up on the different branches of immune-mediated food reactions (IgG, IgA, IgE), as well as general inflammatory foods and irritants.
The Purpose of an Elimination Diet
The purpose of an elimination diet is to:
Reduce inflammation
Lower the allergenic load
Identify food triggers
Support a healthy gut microbiome
Promote body awareness to food
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Who Would Benefit from an Elimination Diet?
An elimination diet is an amazing tool if you are experiencing:
Body aches and pains
Fatigue
Digestive symptoms like bloating or IBS
Skin issues like eczema or acne
Swelling in the hands, feet, face, or legs
Intense cravings or food noise
There are various types of elimination diets.
Most will avoid gluten, dairy, and sugar, but they can differ to also include common allergens like corn, soy, and peanuts, or nightshade vegetables (tomato, potato, peppers, eggplant), shellfish, red meat, pork, or even grains and legumes.
The 7-Food Elimination Diet
The simple 7-food elimination diet is probably the most popular, and involves avoiding the following 7 foods:
All dairy products
Gluten-containing grains (wheat, spelt, kamut, barley, rye)
Corn
Soy
Sugar
Eggs
Peanuts
This may sound like a lot, but it is done for just 3 weeks, and then foods are gradually reintroduced.
When I do this with patients, I always provide recipes and meal plans so that this plan can be adapted according to your food preferences, especially protein preferences, whether you eat meat or are vegetarian.
The interesting thing is that even if it seems hard at the start, when you focus on the positive benefits, and especially when you start to feel better, it becomes much easier to follow.
The Most Important Tip for Success
The most important tip that I have is to be well prepared, focus on all of the great foods you can eat, and have an abundance of healthy foods on hand so you don’t feel deprived.
It is possible to shift this mindset with a focus on all of the tasty foods you can eat, and keep it a food adventure.
Foods That Help Lower Inflammation
Foods that are especially helpful to include when we focus on lowering inflammation include:
Dark leafy greens
Red and blue coloured fruits and vegetables
(red cabbage, red onion, berries, red grapes, cherries, plums)Spices like ginger, turmeric, garlic, rosemary, and oregano
Fatty fish
(salmon, mackerel, cod, sardines)Nuts and seeds
(especially almonds, walnuts, flaxseeds, and pumpkin seeds)
What Most People Notice During the 3-Week Elimination Phase
What most people notice during the three-week elimination phase:
Less body pain
Better energy levels
Significant reduction in bloating
Better mental clarity
Weight loss (if desired)
Less food noise and cravings
More clear skin
Better digestion
What Can You Eat on a 3-Week Elimination Diet?
If you’re having a hard time figuring out what you would eat during this 3-week elimination, here are some examples from the menu plans:
Breakfast
Blueberry, banana, hemp heart, almond butter, almond milk smoothie + vegan protein powder
Chia pudding topped with almond milk and fresh berries
Overnight oats with chia, almond milk, berries, and nuts
Lunch
Big salad with roasted chicken or chickpeas, avocado, olive oil vinaigrette, and sweet potatoes
Vegetable lentil soup with side salad and seed crackers
Stir-fried vegetables on brown rice with chicken or beans
Dinner
Roasted / baked / grilled salmon with quinoa and steamed greens
Chickpea coconut curry on quinoa with spinach
Veggie chilli with beans and a side salad
Snack
Fruit with nuts
Coconut milk yogurt with berries, cinnamon, and nuts
Rice or seed crackers with hummus
What you will probably notice is that these meals are all very nutrient-dense,high in fibre, and high in vegetables and fruits.
Regardless of the elimination, you will be providing amazing nourishment to your cells.
Food Reintroduction
Most people are feeling significantly better after just 3 weeks on an elimination diet, and this is the time when we can reintroduce foods to see which ones are problematic.
It’s most important to note that you don’t need to stick with this much restriction even if you are feeling much better.
Foods are reintroduced one at a time every 3 days. For example, you would choose the first food, eat it 2–3 times in the same day, and then wait an additional 48 hours to see if you have a reaction.
Reactions may be:
Digestive
Joint / muscle aches
Headache
Congestion
Skin changes
Energy changes
If there is no reaction, you can continue to eat this food regularly and then move on to the next food.
The elimination diet and then food reintroduction is the most accurate way of personalizing your anti-inflammatory food plan.
It also shows you directly what kind of impact the foods you have been eating are having on your body — both positively and negatively— making it easier to stick with the plan long-term without feeling deprived.
What’s Next?
If you are interested in starting an elimination diet, please ask at your next appointment.
We also do the 7-food elimination as part of the Metabolic Mastery program, as a fantastic tool to address cravings and inflammation.
It is really incredible how powerful food can be to turn inflammation on and off in the body, and it is always a good idea to start with food first.
In some cases, the elimination plan is customized — for example, it may be more paleo for some people, and more vegan for others.
Let’s see what an impact 3 weeks of a new nutrition plan can make!
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Frequently Asked Questions About the 3 Week Elimination Diet
What is a 3 week elimination diet?
A 3 week elimination diet is a short-term nutrition plan designed to help reduce inflammation, lower the body’s overall allergenic load, and identify possible food triggers that may be contributing to symptoms like bloating, fatigue, skin issues, headaches, body pain, or cravings.
How does an elimination diet reduce inflammation?
An elimination diet works by temporarily removing some of the most common inflammatory foods and food sensitivities from the diet. This gives the body a chance to calm inflammation and can help improve symptoms like joint pain, brain fog, digestive issues, acne, and low energy.
What foods are removed in the 7-food elimination diet?
The 7-food elimination diet usually removes the following foods for 3 weeks:
Dairy
Gluten-containing grains (wheat, spelt, kamut, barley, rye)
Corn
Soy
Sugar
Eggs
Peanuts
These are then reintroduced one at a time to help identify which foods may be triggering symptoms.
How long should I do an elimination diet for?
In this approach, the elimination phase lasts 3 weeks. This is often enough time for many people to notice improvements in symptoms and get useful information about how their body responds to certain foods.
Who can benefit from an elimination diet?
An elimination diet may be helpful for people experiencing symptoms such as:
Bloating or IBS
Fatigue
Brain fog
Joint or muscle pain
Migraines
Eczema or acne
Swelling
Cravings or food noise
It can be a very useful tool for people dealing with inflammation, digestive symptoms, or suspected food sensitivities.
What can I eat on a 3 week elimination diet?
Even though certain foods are removed, there are still many nourishing and satisfying foods you can enjoy, including:
Leafy greens and vegetables
Berries and fruit
Nuts and seeds
Beans and lentils
Healthy fats like olive oil and avocado
Fish, chicken, or plant-based proteins
Quinoa, brown rice, and sweet potatoes
The goal is to focus on whole, anti-inflammatory foods rather than calorie restriction.
Will I lose weight on an elimination diet?
Some people do notice weight loss during an elimination diet, especially if inflammation, bloating, cravings, or blood sugar instability were contributing factors. However, the main goal is not weight loss — it is to reduce inflammation and understand how food is affecting your body.
What symptoms might improve during an elimination diet?
Many people notice improvements such as:
Less bloating
Better digestion
More energy
Clearer skin
Reduced cravings
Less body pain
Better mental clarity
Results vary, but even a short elimination diet can provide helpful information.
How do you reintroduce foods after an elimination diet?
Foods are usually reintroduced one at a time every 3 days. You would eat the test food 2–3 times in one day, then wait 48 hours to watch for symptoms such as:
Digestive upset
Headaches
Joint or muscle aches
Skin flare-ups
Congestion
Changes in energy or sleep
This helps identify which foods your body tolerates well and which ones may be contributing to symptoms.
Is an elimination diet the best way to test for food sensitivities?
In many cases, yes. An elimination diet and food reintroduction process is often one of the most practical and accurate ways to identify how foods are affecting your body, because it captures real symptom changes rather than relying on just one type of test.
Can an elimination diet help with bloating and digestive issues?
Yes — an elimination diet can be very helpful for bloating, IBS symptoms, gas, abdominal discomfort, and other digestive concerns, especially when certain foods are triggering inflammation or gut irritation.
Should an elimination diet be personalized?
Yes. While the 7-food elimination diet is a common starting point, elimination diets can also be customized depending on your symptoms, preferences, and health goals. For some people, the plan may lean more paleo, and for others more plant-based or vegan.
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