This book presents the frontier research of toxicology and health risk assessment of chemicals. First, it provides an overview of the current methods of evaluating safety amounts of chemicals and provides a new aspect of the principle of toxicology. Secondly, it shows recent research where the new method of health risk evaluation is adopted, followed by an integrated health risk assessment of chemicals. Finally, it describes the epigenetic inheritance of chemical impact on health throughout several generations. 
Estimating the safety amount of chemicals surrounding our lives is not...