Could Your Symptoms Actually Be a Food Intolerance?


Food intolerances or "sensitivities" can affect you in so many ways.


And they are a lot more common than most people think.


I'm not talking about anaphylaxis or immediate allergic reactions that involve an immune response. Those can be serious and life-threatening.  If you have any allergies, you need to steer clear of any traces of foods you are allergic to, and speak with your doctor or pharmacist about emergency medication, if necessary. 


What I'm talking about, is an intolerance, meaning you do not tolerate a specific food very well and it causes immediate or chronic symptoms anywhere in the body. Symptoms can take up to 72 hours to show themselves. And symptoms can be located just about anywhere in the body.


This is what makes them so tricky to identify.

Symptoms of food intolerances


There are some common food intolerances that have immediate and terribly painful gastrointestinal symptoms, such as lactose intolerance or celiac disease. These can cause stomach pain, gas, bloating, and/or diarrhea;  symptoms can start immediately after eating lactose or gluten.


On the other hand, other more insidious symptoms may not be linked to foods in an obvious way.


Symptoms like: 

  • Acne and eczema
  • Sweating, or increased heart rate or blood pressure 
  • Headaches or migraines
  • Chronic muscle or joint pain 
  • Exhaustion after a good night's sleep 
  • Autoimmune conditions like Hashimoto's or rheumatoid arthritis
  • Rashes or eczema
  • Inability to concentrate or feeling like your brain is "foggy"
  • Gas, bloating, diarrhea or constipation


    If your body has trouble digesting specific foods, it can affect your hormones, metabolism, or even cause inflammation and result in any of the symptoms listed above. And these can affect any (or all) parts of the body, not just your gastrointestinal system.



    How to prevent these intolerances


    The main thing you can do is to figure out which foods or drinks you may be reacting to and stop ingesting them.


    I know, I know...this sounds so simple, and yet it can be SO HARD.


    The best way to identify your food/drink triggers is to eliminate them.


    Yup, get rid of those offending foods/drinks. All traces of them, for three full weeks and monitor your symptoms.   

    If things get better, then you need to decide whether it's worth it to stop ingesting them, or if you want to slowly introduce them back one at a time while still looking out to see if/when symptoms return.     

         Alternatively, you can see a Naturopathic Doctor, like myself, for food                   sensitivity testing.

Start Here: Two Common Food Intolerances


Here are two of the most common triggers of food intolerances:


  • Dairy- NOT LACTOSE  - milk, cheese, yogurt, butter. Dairy is frequently  found in baked goods, and some sauces. Many people react to either casein and whey which are the proteins in dairy. These proteins are still present in lactose-free products. Try nut or coconut milk as an alternative. For more dairy substitutes, and more information on dairy sensitivity, see my blog "Is Dairy The Devil?"
  • Gluten (in wheat, rye, and other common grains - look for a "gluten-free" label - try gluten-free grains like rice, quinoa & gluten-free oats). Gluten is a definite "no-no" for anyone with a thyroid issue. More about that here


This is by no means a complete list, but it's a good place to start because dairy intolerance is thought to affect up to 75% of people,  while "non-celiac gluten sensitivity" can affect up to 13% of people.


So, if you can eliminate all traces of dairy and gluten for three weeks, it can confirm whether either or both of these, are a source of your symptoms.


Yes, dairy and grains are a part of many government-recommended food guidelines, but you absolutely can get all of the nutrients you need if you focus on replacing them with nutrient-dense foods.


A reliable way to monitor how you feel after eating certain foods is to track it. After every meal or snack, write down the foods you ate, and any symptoms so you can more easily spot trends. 



And, as mentioned earlier, symptoms may not start immediately following a meal. You may find, for example, that you wake up with a headache the morning after eating bananas.


You might be surprised what links you can find if you track your food and symptoms well!


IMPORTANT NOTE: When you eliminate something, you need to make sure it's not hiding in other foods, or the whole point of eliminating it for a few weeks is lost. Restaurant food, packaged foods, and sauces or dressings are notorious for adding ingredients that you'd never think are there. You know that sugar hides in almost everything, but did you also know that wheat is often added to processed meats and soy sauce, and dairy can even be found in some medications or supplements?


When in doubt you HAVE to ask the server in a restaurant about hidden ingredients, read labels, and consider cooking from scratch.     


What if it doesn’t work?


If eliminating these two common food intolerances doesn’t work, it is a good time to consider doing a Food Sensitivity Test. I see many patients who have intolerance to foods they would never expect, like almonds, potatoes, and eggs. 


You may need to see a Naturopathic Doctor for help, and that's OK. I don't want you to continue suffering if you don't need to!


Recipe (dairy-free milk): Homemade Nut/Seed Milk


 Makes 3 cups


½ cup raw nuts/seeds (almonds, walnuts, pecans, pumpkin seeds, or sesame seeds)

2 cups water

¼ teaspoon vanilla extract (optional)


  1. Soak nuts/seeds for about 8 hours (optional, but recommended).
  2. Dump soaking water & rinse nuts/seeds.
  3. Add soaked nuts/seeds and 2 cups water to a high-speed blender and blend on high for about one minute until very smooth.
  4. Strain through a small mesh sieve with 2 layers of cheesecloth. Squeeze if necessary.


Serve & enjoy!


Talk soon!

Dr Alexis 


Dr Alexis practices in Kanata and has a special interest in Acne, PCOS, Women in their 20's and 30's with Low Energy, and Female Athletes. She is currently accepting new patients. Click here to schedule your appointment. 




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