What is food intolerance?

Food intolerance is essentially an abnormal reaction to certain foods which can manifest itself in a number of ways. It may be the result of various different mechanisms, however Cambridge Nutritional Sciences (CNS) is primarily interested in those food intolerances in which an immune response occurs (i.e. IgG antibodies are produced), and has developed tests that detect the presence of these antibodies using a pin-prick sample of blood.

Other mechanisms of food intolerance are not mediated by the immune system. Typical examples include:-

Enzyme insufficiency/ deficiency

– lactase as in lactose intolerance (bloating, diarrhoea, abdominal pain)

Chemical / pharmacological sensitivity

– MSG in Chinese food ( headaches, sweating, dizziness)

– Sulphites in dried fruits and vegetables, wine, beer (asthma)

– Vasoactive amines such as phenylethylamine in chocolate, red wine (migraines)

What is food intolerance?

Difference between Food Intolerance and Allergy