Basics of human toxicology

The physician Paracelsus (1493-1541) was the first to say that "Dosis sola facit venenum," usually translated as: "All substances are poisons; there is none which is not a poison. The right dose differentiates a poison and a remedy."  

Human toxicology evaluates potential effects of natural or synthetic substances on human health. They can be found in numerous locations such as the foods we eat, the air we breathe, the products we use at home and at work and many more. Today, toxicology has very practical applications. Many industrial toxicology studies are conducted to satisfy regulatory requirements and to provide data for setting the conditions and limits for the safe handling, use and disposal of substances. Our focus in this resource guide is on synthetic chemical substances.