Results of a new study suggest that bisphenol A can have harmful effects on the way genes work in the brains of rats. The study, which was conducted at Columbia University, is significant because it used "environmentally relevant" doses of BPA that were fed to rats, instead of unrealistically high doses that were injected. However, the doses used were "still 10-20 times higher than normal human bisphenol A exposure," according to Richard Sharpe of the Medical Research Council's Centre for Reproductive Health in Edinburgh.

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