Food allergy is often the reason behind many ailments. Many people suffer for years from symptoms as diverse as aching joints, migraines, ulcers and skin irritations without realizing that the problem may be caused by diet. In this guide to identification, prevention and treatment, the authors give a step-by-step approach of how to follow an elimination diet and include a discussion of alternative treatments as well as underlying conditions in the body. It also looks objectively at the scientific evidence and the controversies surrounding it, considers interactions between mind and body and looks at related problems such as chemical sensitivity. Dr Brostoff runs the UK's highly-regarded allergy clinic based at the Middlesex Hospital in London and teaches and lectures throughout the world. Linda Gamlin is a regular contributor to the "New Scientist" magazine.