“We live in a soup of ‘estrogens,’ if you will, which we can acquire from almost anywhere.” This complicates our food choices, she says, because people seldom know what upstream contaminants have contacted our foods and beverages before we’re given the choice: Plastic or something else?
Researchers in Frankfurt, Germany, have just reported evidence suggesting that the mineral water dispensed in some glass bottles may also contain such hormonelike pollution — and not because it leached out of the glass.
This would mean the water was polluted prior to bottling. Several scientists now suspect one source might be the plumbing used to move water from natural reservoirs to — and/or through — processing equipment in a bottling plant.
Polyvinyl chloride tubing, for instance, is widely used by industry. So if mineral water were pumped through PVC piping it could pick up bisphenol-A, organotin and phthalates — “because [PVC] is a source of all those,” notes Shanna Swan, an environmental epidemiologist at the University of Rochester School of Medicine and Dentistry. And, she adds, all of these materials that have been found in PVC have an estrogenic alter ego.
Polycarbonate plastic is also used for industrial tubes and piping, notes endocrinologist Ana Soto of the Tufts University School of Medicine in Boston. The basic building blocks of that plastic are molecules of bisphenol A, a compound that her team has established to be a potent estrogen mimic.
Phthalates, a widely used class of volatile industrial solvents and plasticizers, also can taint water or any other material — outdoors or in a bottling plant, Soto notes. Another potential source of waterborne “hormones”: excreted drugs. Many of the ones that are known to taint water supplies can turn on estrogen receptors in the body.
Read full from source: sciencenews.org