Some people have a reaction to particular food proteins. Their immune system produces antibodies which can cause symptoms such as itching, vomiting, cramps and diarrhoea. Usually only one or two foods are involved, for example, milk, eggs, peanuts or fish. The symptoms occur within minutes or a few hours of eating the food protein. A severe allergic reaction requires urgent medical attention.
Treatment is by complete avoidance of the food containing the protein which causes the reaction.
An intolerance to natural chemicals or additives in our foods can cause a wide range of symptoms such as hives, skin swellings, headaches, bowel irritation, mouth ulcers, feeling generally unwell or run down. Most of us are not sensitive to these substances but some people can develop symptoms if large amounts are consumed or the diet suddenly changes. Symptoms can appear within minutes or may build up over a period of weeks. Food intolerances can be managed by restricting the intake of or totally avoiding foods causing the problems. It can be very difficult to diagnose food intolerances and referral to a specialist allergy clinic or dietitian is often recommended.