Bisphenol A, or BPA, is known as an endocrine disrupter. That means it acts like estrogen in the body. BPA is a component of hard plastic and is found in bottles and toys as well as the linings of cans and cash register receipts. Scientists now propose that a metabolite of BPA called MBP contributes to the trouble this chemical may cause. MBP binds much more tightly to estrogen receptors than BPA does and may help explain why the compound has been linked to health problems from obesity to cancer.
[PLOS ONE, online, Oct. 4, 2012]