Bottled mineral water may deliver more than a no-calorie thirst quencher. If dispensed in bottles made from a type of plastic known as PET, for polyethylene terephthalate, this water may also pack a substantial quantity of estrogen-mimicking pollution, according to researchers at Johann Wolfgang Goethe University in Frankfurt.
Previous studies had demonstrated polycarbonate bottles — a hard, clear-plastic type — can leach bisphenol A, a chemical that turns on estrogen receptors in the body. But the bottles in the new study were made from a different plastic, the type used in most single-use water bottles.
And in the new study, most glass-bottled waters show little or no estrogenicity. One PET-bottled brand of water also registered no estrogenicity,. The other PET-bottled waters all showed some hormone action. Five exhibited dramatic estrogenicity. So did water distributed in Tetra Pak containers, which may have a plastic interior lining.
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