What is the difference between allergy and intolerance?

The term ‘food intolerance’ and ‘food allergy’ are often confused and are two very different things.

Genuine food allergy is relatively rare. Only about 2% of the adult population are affected. A food allergy is a swift response by the body’s immune system to a food protein when the body’s immune system mistakes a food for an ‘invader’. This results in a rapid and intense allergic reaction, often within minutes but generally within a maximum of two hours. Allergic reaction is commonly associated to peanuts, eggs or seafood.

Food intolerance is characterised by a slow and non-life threatening immune re response. Food intolerances are much more common than food allergies.

When foods and drinks are digested the proteins within them are broken down into smaller fragments for easy absorption into the body. Larger fragments can pass through without breaking down, and can drive the immune system to produce antibodies called Immunoglobulin G’s (IgG).

A recent study* has shown that those who eliminated trigger foods based on food-specific IgG test results had reductions in weight, body mass index, waist and hip circumference and improvements in all indicators of quality of life that were measured. The quality of life indicators included physical and emotional wellbeing, mental health, social life, pain levels and vitality.

Allergy vs Intolerance what are the specific responses?

Food Intolerance: Reactions up to 72 hours after eating; Multiple foods can be involved; Any organ system can be affected; Very common Trace amounts of foods can cause reactions; Caused by raised IgG antibody; Symptoms can clear after avoidance (3-6 months)

Food allergy: Immediate reactions (2 hours or less); Rarely more than 1 to 2 foods; Primarily skin, airways and digestive system; Difficult to self-diagnose; Caused by raised IgE antibody and therefore life-long Lifelong

On average people who suffer from food intolerances usually have between 4 and 8 trigger foods.

More information about prices and nutritional counseling available alongside food sensitivity testing 

It is possible to simply order a test. There is no charge for us to organise your food intolerance test. As part of the test you will receive a comprehensive report outlining which foods to avoid, which to reduce and which are perfectly safe. If no food sensitivity is identified you will be refunded the price of your test.

If you are struggling with your health or find it difficult to know what to eat I recommend that you also book a consultation alongside your food testing.

Symptoms of food intolerance include:

Many people suffer for years, having formed a coping mechanism to deal with the symptoms without necessarily getting to the bottom of it.

Food intolerance is a condition with a wide range of symptoms including: including gut symptoms, bloating, migraines, low mood, weight gain, fatigue and skin problems.

More specifically the following symptoms can often improve and sometimes clear completly when avoiding the foods that trigger IgG immune response.

Abdominal Pain
Aches and Pains
Chronic Fatigue Syndrome
Irritable Bowel Syndrome (IBS)
Fluid Retention
Stomach Cramps
Weight loss/Weight Gain

*Lewis J et al, 2012: Eliminating Immunologically-Reactive Foods from the Diet and its Effect on Body Composition and Quality of Life in Overweight Persons. Journal Obesity & Weight loss Therapy 2:1

Book your Food Intolerance Testing

Food testing liver homocysteine

Prices and details of foods tested


No special preparation is required prior to carrying out the test, just make sure that you have eaten the food that you would like to test within 4 weeks of doing the test.

The test can be done at home or at the clinic and requires only a very small amount of blood. 

To book you test contact 

Anne-lise miller 07502 222 269