What is a carcinogen?

A carcinogen is defined as a substance that causes cancer. Carcinogens can be found in various forms, including chemicals, certain types of radiation, and even some viruses. They induce changes in the genetic material of cells, leading to uncontrolled cell division and the development of tumors. Understanding the role of carcinogens is vital for public health, as it aids in raising awareness about risks associated with exposure to harmful substances, allowing individuals to make informed decisions regarding their health and safety.

The other choices do not accurately reflect the definition of a carcinogen. For instance, a substance that prevents cancer refers to chemopreventive agents, which have the opposite function. A type of cancer cell does not define what a carcinogen is, but rather describes a result of cancer development. Finally, medications used for cancer treatment, such as chemotherapy drugs, are designed to target and eliminate cancer cells rather than being associated with the promotion of cancer formation.