By Olivia Rose ND
Naturopathic Doctor and Registered Acupuncturist


Food intolerances occur when your body has a reaction, often delayed, to a food or a food additive. In my naturopathic practice many of my patients have food intolerances and do not realize it because the symptoms can be vague and can often come on hours or days after eating the food. This characteristic also makes food intolerances difficult to diagnose. Food intolerances cause irritation to your gastrointestinal tract and worsen the effects of conditions that may not be directly caused by food intolerances. Common types of food intolerance include dairy or lactose, wheat, eggs and food additives such as MSG and sulphites.

What are the symptoms?
The symptoms of food intolerance can vary. For example, two people may have intolerance to cow’s milk but whereas one person may experience sinus congestion, the other individual may experience diarrhea and abdominal cramping. In general, common symptoms of food intolerances include but are not limited to bloating, diarrhea, constipation, acne, skin rashes, joint pain, headaches, fatigue and irritability.

Food Intolerance vs. Food Allergy
A food allergy occurs when the immune system reacts to specific proteins in a food. Your immune cells, IgE antibodies are activated and histamine is released. An allergic food reaction can be mild (ie. hives) or life-threatening (ie. death). Food intolerances are not usually life-threatening but can certainly interfere with your quality of life. Symptoms of food intolerance usually appear gradually whereas symptoms of food allergy often come on immediately. Both conditions can share the gastrointestinal symptoms such as abdominal pain, vomiting and diarrhea.

Get Tested
The symptoms of food intolerance can vary. For example, two people may have intolerance to cow’s milk but whereas one person may experience sinus congestion, the other individual may experience diarrhea and abdominal cramping. In general, common symptoms of food intolerances include but are not limited to bloating, diarrhea, constipation, acne, skin rashes, joint pain, headaches, fatigue and irritability.

Take a Probiotic
When the bacteria that reside in your gut have been reduced, you can become more susceptible to food intolerance symptoms. In some cases food intolerance may develop or worsen after a stressful event. Chronic stress can play a role in reducing your healthy gut bacteria. The overuse of antibiotics and poor nutrition are other factors that are important for maintaining the health and integrity of your intestinal bacteria. Probiotic supplements contain species of friendly gut bacteria and may be helpful in treating and preventing the development of food intolerances.

Prevention Tips
Once you are aware of your food intolerances it is important to read the nutritional labels in order to avoid your trigger foods. If possible, avoid the consumption of processed foods that contain ingredients that are difficult to pronounce. Another way to improve the health of your gastrointestinal tract is to purchase organic food whenever possible. If you are new to purchasing organics, begin with the dirty dozen, a list of 12 to 15 vegetables and fruits, tested by the Environmental Working Group, that contain the highest amount of pesticide residues. Pesticide residues have been linked in scientific studies to an increased incidence of both food allergies and food intolerances.


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