Glossary of Breast Cancer Exposures


What is an exposure?

We often come into contact with—or are exposed to—substances and other factors linked to breast cancer. These include chemicals as well as physical agents such as ionizing radiation and light-at-night. This glossary highlights certain exposures with the strongest evidence linked to breast cancer. For each, we describe what it is, where it’s found, the science linking it to breast cancer, who is most vulnerable and how to avoid the exposure.

1,3 Butadiene
Aromatic Amines
Bioidentical Hormones
Bisphenol A (BPA)
Bovine Growth Hormone (rBGH)/Recombinant Bovine Somatotropin (rBST)
Dichloro-Diphenyl-Trichloroethane (DDT)
Dieldrin and Aldrin
Diethylstilbestrol DES
Ethylene Oxide (EtO)
Hormone Replacement Therapy (HRT)
Hormones in Personal Care Products
Ionizing Radiation
Night Shift Workers: Light-at-night
Non-Ionizing Radiation (EMFs)
Oral Contraceptives
Organic Solvents
Other Pesticides & Herbicides
Perfluorooactanoic Acid (PFOA) & Other PFAS Chemicals
Polybrominated Diphenyl Ethers PBDEs
Polychlorinated Biphenyls (PCBs)
Polycyclic Aromatic Hydrocarbons PAHs
Tobacco Smoke
UV Filters
Vinyl Chloride
Zeranol & Mycoestrogens

Exposures we are monitoring

These are exposures that we frequently get questions about. Although we don’t consider them to be exposures of concern at this time, we continue to monitor the relevant emerging scientific evidence.


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