Originally published in 1985, and authored by an epidemiologists, a medical immunologist, a chemist and a clinical psychologist, this books shows that unravelling the links between diet and disease is a very complex task, and while the evidence is strong in many cases, in others if is of doubtful validity. Many of the diseases prevalent in developed countries are discussed here: cancer, arterial heart disease, food allergies and intolerances as well as the impact of diet on mental health.