"In a groundbreaking study, researchers have shown why a chemical once thought to be a safe alternative to bisphenol-A, which was abandoned by manufacturers of baby bottles and sippy cups after a public outcry, might itself be more harmful than BPA.

University of Calgary scientists say they think their research is the first to show that bisphenol-S, an ingredient in many products bearing “BPA-free” labels, causes abnormal growth surges of neurons in an animal embryo.

The same surges were also found with BPA, though not at the same levels as with BPS, prompting the scientists to suggest that all structurally similar compounds now in use or considered for use by plastic manufacturers are unsafe."

Amy Ellis Nutt reports for the Washington Post January 12, 2015. [2]