Natural or synthetic substance that acts like a hormone (hormonally active agent) and thereby disturbs the physiological balance of the endocrine system of animals and humans
Endocrine disruptors may be hormones (e.g. estrogen in birth control pills), as well as other chemical substances like plant constituents (e.g. phytohormones), pesticides (e.g. DDT), and compounds used in industry and consumer products (e.g. PCBs (polychlorinated biphenyls), PBDEs (polybrominated diphenyl ethers) and some phthalates).