Several studies have implicated estrogen, the primary female sex hormone, in fostering a serious autoimmune disease called lupus. That's why scientists had expected that bisphenol-A (BPA), an estrogen-mimicking ingredient of polycarbonate plastics and dental sealants, might also abet lupus. A Minnesota group's rodent data now show just the opposite.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.