What is meant by the term "mutagen"?

The term "mutagen" refers to a substance that causes changes in DNA. Mutagens can alter the genetic material within an organism, and these changes can lead to mutations. Mutations may affect cell function, lead to various biological consequences, and sometimes result in diseases such as cancer. Understanding mutagens is crucial in toxicology, as they can arise from various environmental exposures, including chemicals, radiation, and biological agents, affecting living organisms at the genetic level. This definition underscores the importance of recognizing mutagens in toxicological assessments and the broader implications they have on health and disease.