-Introduction to BPA
So what is BPA anyway? BPA is the common abbreviation for Bisphenol A which is a dysfunctional building block of several important polymers and polymer additives. BPA is also used as a key monomer in production of polycarbonate plastic and epoxy resins. Polycarbonate plastic is used in a large variety of products including water bottles and baby bottles. Epoxy resins are used in the lining of the majority of food and beverage cans including but not limited to beer cans, soup cans, baby food cans, vegetable cans and soda cans. Clearly, BPA is a part of many products used in everyday life.
-Why the controversy surrounding BPA?
So now that we know what BPA is, why do some people say Bisphenol A should be avoided? According to testing on rats it has been shown that BPA can act as an endocrine disruptor which mimics the rats own hormones and can lead to adverse biological effects. Some of these biological effects have included developmental toxicity, carcinogenic effects, and possible neurotoxicity. Although no tests on humans have taken place a recent study by the Yale School of Medicine demonstrated that adverse neurological effects occur in non-human primates regularly exposed to Bisphenol A at levels equal the EPA’s maximum safe dose of 50 µg/kg/day. So while no evidence exists that BPA is harmful to humans there is a concern that long term low dose exposure to Bisphenol A may induce chronic toxicity in humans.
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