These include chemicals, complex mixtures, occupational exposures, physical agents, biological agents, and lifestyle factors.
National health agencies can use this information as scientific support for their actions to prevent exposure to potential carcinogens.
Interdisciplinary working groups of expert scientists review the published studies and evaluate the weight of the evidence that an agent can increase the risk of cancer. The principles, procedures, and scientific criteria that guide the evaluations are described in the Preamble to the IARC Monographs.
Since 1971, more than 900 agents have been evaluated, of which more than 400 have been identified as carcinogenic, probably carcinogenic, or possibly carcinogenic to humans.
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