BPA's Real Threat May Be After It Has Metabolized: Chemical Found

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BPA's Real Threat May Be After It Has Metabolized: Chemical Found in Many Plastics Linked to Multiple Health Threats

Bisphenol A or BPA is a synthetic chemical widely used in the making of plastic products ranging from bottles and food can linings to toys and water supply lines. When these plastics degrade, BPA is released into the environment and routinely ingested.

New research, however, from the University of California, San Diego School of Medicine suggests it is the metabolic changes that take place once BPA is broken down inside the body that pose the greater health threat.

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Of particular concern is that BPA exposure is correlated with disruption of estrogen signaling. The chemical's molecular structure is similar to that of estradiol, one of the human body's three main estrogens, suggesting that BPA binds to estrogen receptors. The estrogen receptor is designed to grab and hold estradiol and related estrogens. Disparate chemicals, however, can share some structures found in estrogens, enabling them to bind to the estrogen receptor. When that happens, problems can occur.

In binding to the estrogen receptor, BPA can disrupt the body's endocrine or hormone system, with consequences especially worrisome for fetuses, infants and young children. Earlier this year, the U.S. Food and Drug Administration banned BPA in baby bottles and sippy cups. Its use is more broadly banned elsewhere in the world.

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The article goes on to say 90% of us are already exposed. This is the reason I rarely drink water from a plastic bottle.

Read more here: http://www.scienceda...21004200905.htm

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