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For BPA, lead, and other toxic chemicals, accumulating science consistently lowers the levels we consider safe.


After careful evaluation of the latest science, European officials have proposed lowering the safe daily dose of bisphenol-A, or BPA, by a factor of 100,000.
The same agency had already dropped their recommended exposure limit in 2015, down 12-fold from where they set it in 2006. "It’s almost like the limbo stick: How low can we go?" Cheryl Rosenfeld, a biologist at the University of Missouri, told EHN.
Whether it's lead, phthalates, per- and polyfluoroalkyl substances (PFAS), or BPA, nearly every time scientists assess chemicals, they lower the thresholds for safety. Doses that were previously thought innocuous, we find, turn out harmful. Why does that happen? And why does it seem to be happening yet again with BPA?...