BPA, or bisphenol A, is ubiquitous. Simply put, just about anything you eat that comes out of a can — from Campbell’s Chicken Soup and SpaghettiOs to Diet Coke and BumbleBee Tuna — contains the same exact chemical.

The exposure to BPA from canned food “is far more extensive” than from plastic bottles, said Shanna Swan, a professor and researcher at the University of Rochester in New York. “It’s particularly concerning when it’s lining infant formula cans.”

BPA is the key compound in epoxy resin linings that keep food fresher longer and prevents it from interacting with metal and altering the taste. It has been linked in some studies of rats and mice to not only cancer but also obesity, diabetes and heart disease.
…
One scientist helping to lead the charge against BPA is Yale University physician, professor and researcher Hugh Taylor. His research has shown that the chemical alters the way genes react to estrogen, and could open the door for infants in utero to develop cancer much later in life.

“I tell my pregnant patients to avoid products containing it,” he said. “Even a fleeting exposure in pregnancy can cause lasting damage.”

The studies by Taylor are certainly eye-opening. They have shown that the chemical alters the way DNA operates, a process known as an epigenetic change.

On each strand of DNA a group of carbon molecules binds to receptors that help turn genes on or off. In the presence of BPA, though, many of those carbon molecules can be removed from DNA, and with them the switch.

Think of the carbon groups as a kind of lock, and the DNA receptors as a gate. When the lock is removed, the gate can swing open, greatly increasing the risk for estrogen to flow through later in life, interact with DNA and cause cancer.

“It has permanent, lasting effects,” said Taylor.

~ Ernest Scheyder, Reuters – full article here

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