Carcinogens are substances or agents that can cause cancer. They can be chemical, physical, or biological agents. Chemical carcinogens include compounds like benzene, formaldehyde, and asbestos fibers. Physical carcinogens include ionizing radiation, such as X-rays and gamma rays, and ultraviolet radiation from the sun. Biological carcinogens include certain viruses, bacteria, and parasites. Exposure to carcinogens can increase the risk of developing cancer.
