BPA Revisited

BPA logoPrevious articles (5/5/211, 12/19/2012 and 1/24’2013) were about the health hazard from Bisphenol-A, and how we are exposed. Those article described the controversary about health risks from BPA, its presence in paper receipts, and its disguised replacement, BPS. It’s time for an update.

First a reminder that BPA is a hormone mimic, and therefore can activate some hormone receptor sites on cells. Measurements of BPA in urine have disclosed levels of 2 to 10 ppb, higher than levels of many natural hormones in the blood. (BPA is readily removed from the blood and excreted in the urine. The fact that it is usually found in the urine indicates rather continuous exposure to it.) Following are highlights from recent articles.

  • California became the latest state to declare BPA a reproductive toxicant.
  • BPA was detected in fetal liver samples from first- and second trimester terminated pregnancies. More importantly, 80 percent of the BPA was the more active type (free-BPA), higher than the 10 to 20 percent of active type in adult blood or urine.
  • Researchers evaluated the relationship between levels of BPA in urine with adipose fat, cholesterol, insulin and glucose in 3400 children, ages 6 to18. They found that higher levels of BPA were associated with increased risk of obesity.
  • A research group at Tufts University studied prenatal exposure in rats to subsequent occurrence of mammary tumors in the offspring. They found mammary gland tumors in six female offspring that had been exposed perinatally.
  • The Breast Cancer Fund issued a report, Disrupted Development: The Danger of Prenatal BPA Exposure. The report stated, “Not only are fetuses exposed to BPA from the mother, the younger they are, the less able they are to eliminate it rapidly. In other words, the time period when the most rapid development is occurring is also the times when the most exposure is likely happening…The largest source of BPA (directly to infants) is from canned foods.”

A closing note: Avoid buying prepared baby food in cans – buy it in glass containers. Minimize handling of paper ATM and cash register and credit card receipts. Pregnant women especially should take these precautions.

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About donlouis

The author has long had a keen interest in staying healthy and fit, and in doing whatever I can to keep the natural environment unpolluted and a healthy space for people and all animals. As a former Board Member of a municipal water district, I regularly had to deal with the issue of water quality. I first became aware of radiation hazards from toxic materials while working on uranium for nuclear reactors. During the 1960s I was tuned into the global hazard from Strontium 90 raining down from atmospheric testing of nuclear bombs. While working in the chemical industry in later years I became aware of the many forms of chemical contaminants entering the environment every day, and resolved to do something about it. I am able to make sense out of the voluminous descriptions of common toxic chemical because of my training in chemistry, with a Ph.D. degree and several decades of research and development work in the chemical industry. My training and experience enables me to present to readers reliable and current information on the topic of chemical hazards in the environment, and their threats to human health. All my life I have loved hiking and camping in nature. Skiing, river kayaking, and tennis have been my favorite physical activities. Nature photography is my artistic passion.
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