Bisphenol A (BPA), a chemical used in some types of plastics, has gotten a lot of public attention in recent years because of its estrogen mimicking effects and the public’s widespread exposure to it. Many manufacturers have removed BPA from products which come into contact with food, and in some jurisdictions there are now regulations limiting its use.
One of the chemicals that is used as a replacement for BPA is bisphenol S (BPS). BPS is chemically related to BPA and actually has the same inherent estrogenic activity which is problematic in BPA. However, BPS was thought to be a safer alternative because, it was claimed, it did not leach from plastics like BPA does.
That belief is now being questioned. An article at Scientific American details some of the research and concludes that the real issue behind the public safety problem is not so much that we can’t determine the health concerns associated with a particular chemical but that, “Currently, no federal agency tests the toxicity of new materials before they are allowed on the market.”