Food contamination and carcinogenesis are of great public interest. The present situation concerning melamine contamination in China has become a wakeup call to nations around the world. It is time to be extremely concerned with food safety. The data on food contamination and carcinogenesis is useful and must be systematised collected. This data can be a reference in medical and biological science. In this book, important information concerning food contamination relating to carcinogenesis is presented and discussed.