Most plastics — including many that are BPA-free — can leach out chemicals with estrogenic activity (EA). In one study, researchers tested over 500 plastic products available to consumers — including baby bottles, tupperware containers, sandwich bags and plastic wraps — and found that virtually all of them leached chemicals that “produce an increase in circulating estrogen, which in turn can cause problems such as early puberty in females, reduced sperm counts, altered function of the reproductive organs, obesity, increased rates of certain cancers and problems with infant and childhood development.” If you feel compelled to do this choose plastic that is made of 100% polyethylene, and contains no plasticizers or estrogen-like compounds.
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Most plastics — including many that are BPA-free — can leach out chemicals with estrogenic...