Made famous by Dr William Howard Hay, the Hay Diet is the practice of food combining - eating foods that go well together according to the needs of the digestive systems and avoiding eating foods that are not compatible at the same meal. The authors argue that eating habits as practised by food combining will help acid indigestion, food allergies and other eating complaints. They show how to make the most of the foods eaten by providing explanations of the scientific and physiological principles that lie behind food combining, as well as 200 vegetarian recipes. An at-a-glance reference chart for food combinations is also included.