On June 16, 2014 the American magazine Mother Jones reported on scientific findings of estrogenic chemicals migrating from BPA-free plastic products. In her article, journalist Mariah Blake summarized a recent peer-reviewed publication by scientists who had measured estrogen activity leaching from different brands of plastic baby bottles and other plastic containers, using in vitro assays (Bittner et al. 2014; FPF previously reported). The scientists tested 50 re-useable containers and exposed them to heat and UV radiation. More than three-quarters of the tested containers were shown to be positive for estrogenic activity, regardless of their plastic type. Notably, brand names of specific products are detailed, and the Mother Jones article gives an overview of selected products’ estrogenic activity before and after UV exposure.

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Mariah Blake. These popular plastic bottles may be messing with your hormones. A new study finds that many BPA-free brands advertised as safe may be anything but. Mother Jones (online June 16, 2014)

Estrogenic activity of BPA-free products. Food Packaging Forum (June 3, 2014)


Bittner, G. et al. (May 28, 2014). “Estrogenic chemicals often leach from BPA-free plastic products that are replacements for BPA-containing polycarbonate products.” Environmental Health 2014, 13:41.