Food Intolerance Testing

We offer food intolerance tests and testing with advice in relation to sensitivities and allergy to foods.

Food Intolerance tests and testing

Many people these days think they have food intolerances to certain foods or are allergic to them. The truth is that this is often not the case.

Part of this rise is due to the marketing of Free From foods and the fact that in some ways it has become fashionable to say that we are intolerant/allergic to certain food groups.

The difference between an allergy and intolerance is that an allergy is an almost immediate reaction with anaphylaxis shock to say a peanut being at the extreme end. At the other end would be, say your lip swelling after eating cherries.

Intolerances on the other hand are characterised by a delayed response which will normally be a few hours but in some rare cases can take for up to a week. Various studies have shown that allergies only affect about 3% of the population whilst food intolerances can affect 40% of the population at some time in their life.

Food allergens are normally pretty obvious and easy to identify for a skilled practitioner, therefore the majority of this article will focus on the more common food intolerances. The most common food intolerance symptoms are

– Bloating
– Irritable bowel Syndrome (IBS)
– fatigue
– Fluid retention
– Eczema and other skin disorders
– Asthma
– Migraines

Click here to read testimonials from some of our clients

However, we rarely recommend food intolerance tests – we frequently find in our clinical practice that food intolerances are not the cause of the health problems, but in fact the symptom. Food intolerances can often arise because a person’s digestive system has become compromised through poor diet, excess stress, infections, or antibiotic use.

Taking the above into account, food intolerance tests could effectively be renamed as gut integrity tests. Normally when someone has an intolerance this is due to the gut lining, having been eroded slightly due to poor diet & lifestyle choices. This lining is only a few cells thick and once eroded food particles cross this barrier into the blood stream where the immune system sees them as invaders and causes the symptoms as described above.  Therefore often a more useful test is a blood test for measuring intestinal permeability.

The reason food intolerance tests are generally avoided is that where the results indicate a food to avoid, this does not address the underlying cause and in time, the individual will become intolerant to more foods until the gut lining is healed using nutritional medicine.

Notwithstanding the above non coeliac gluten sensitivity is very common especially in autoimmune disease and thyroid health therefore this a test we regularly run as it is so prevalent.

Testimonial And Google Reviews

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Gut problems testimonials

“I came to see Oliver with severe gastrointestinal problems so much so that conventional medicine had given up with me. I was very nauseous all the time and any food I ate seemed to cause me gut problems. After my first visit to Oliver within two weeks all my symptoms had been alleviated and within two months Oliver had discovered that I had developed severe gluten intolerance. All I need do now is avoid gluten containing foods. This is the best I have felt in many years. Thank you again Oliver.

Conditions that we can treat include...


My session with Oliver Barnett was very interesting and informative and he told me how to build on my existing healthy diet, broadening what I ate and how I prepared it, and prescribed a course of herbs and a detox.

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