We all need some chemicals in our bodies - biochemistry. However, there are chemicals in our environment which might be inhaled, eaten or used on the skin, which we do not necessarily need and which can interact with chemicals already present inside us, with harmful and in some cases, devastating effects. Using charming illustrations to explain his points, the author, an allergy specialist, discusses the interactions between the biochemicals which should keep us alive and healthy and the external, potentially harmful chemicals which enter us from the environment in which we spend most of our lives. He also covers the sources of allergens, with some surprising facts. This book will be appreciated by lay readers and professionals alike; its clarity makes it easy to read and understand. Look up your condition, it may be more prevalent than you think.