What defines a carcinogen?

A carcinogen is defined as a substance that is capable of causing cancer in living tissue. This definition encompasses both proven carcinogens, which have a well-documented history of causing cancer, and substances that are believed to have carcinogenic potential based on scientific research and evidence. The focus is specifically on the relationship between the substance and the initiation or promotion of cancerous changes in cells.

Understanding this definition is vital, particularly in fields such as healthcare and beauty services, where exposure to certain chemicals can occur. For example, awareness of carcinogens helps professionals and clients make informed decisions about product safety and handling.

The other options do not accurately capture the essence of what a carcinogen is. One option mentions a substance that may cause cancer but lacks certainty, which doesn’t align with the definition that emphasizes the potential to cause cancer rather than uncertainty. Another option refers to a material that can ignite easily, which relates to flammability, not carcinogenicity. Lastly, a chemical with no known health risks does not fit into the carcinogen category, as it implies a safety status, whereas a carcinogen, by its definition, poses potential health risks.