bisphenol a may linger in body - polycarbonate
Double phenol A, A chemical substance of plastic (BPA)
A new study shows that leaving the body is not as easy as previously thought.
BPA is everywhere: in PVC pipes, in polyester beverage containers, in plastic that packs food and soft food
Beverage cans, even gum.
We have it in our bodies.
In fact, everyone has levels of BPA that can be detected in the body.
Despite Canada's ban on BPA in plastic baby bottles in last October, the United StatesS.
The FDA still believes it is safe. The U. S.
However, the National Toxicology Program identified "concerns" about the safety of BPA ".
No adventures for a few babies
Bottle manufacturers have stopped using BPA in their products.
According to limited evidence, most researchers believe that most of our exposure to BPA comes from food and that the body eliminates each BPA dose within 24 hours.
Connecticut mom Virginia Beach shooting protesters interrupted Harris and now there is evidence that BPA may be in our water or in our food, it hovers in our fat tissue. If confirmed --
The current findings are very preliminary. -
This may mean that BPA is a bigger problem than expected.
The University of Rochester researcher, Dr. Richard Stahlhut, analyzed data from 1,469 cities in the United States. S.
2003 adults from CDC
2004 NHANES study.
This study is for fast people.
A large amount of dietary data was also collected.
Stahlhut compared people's levels of BPA to the time they spent after their last meal.
Because almost all BPA should come from food, and half of BPA should be
In life, he predicted that the average BPA level of people who had been fasting longer than fasting would decline.
"After fasting for 10 to 15 hours, no one should have any detectable levels of BPA," Stahlhut told WebMD . ".
"But it hangs there like a fog in London.
You did see a subtle downward trend, but you didn't see it fall off the map.
It's still in 24 hours.
"What's going on?
People studying in NHANES really fast--
Researchers at the CDC have made sure that.
But they are allowed to drink water, black coffee and sugar-free soda.
John Cienki, a medical toxicologist at the University of Miami, pointed out that BPA may come from diet soda or something else that CDC researchers cannot control.
Cienki, who was not involved in the study of Stahlhut or NHANES, said he was concerned about BPA.
But he warned that there were too many unknowns in the NHANES data to come to any definitive conclusions.
"I don't think the data we're using here is designed to be used like this," Cienki warned . ".
"Yes, we expect more BPA excretion if people fast ---
If they don't continue to consume BPA.
But the study did not control the consumption or exposure of BPA.
However, he noted that BPA may come from another source: tap water.
Surprisingly, there are very few people doing BPA tests on tap water.
These tests did not look for BPA chloride, which would be in the form of BPA filtered from PVC pipes to municipal tap water.
Alternatively, not all BPA is taken in, says Stahlhut.
Perhaps, as some studies have shown, it still exists in the fat tissue.
BPA may be a bad factor in human fat compared to harmless storage.
A 2008 study in the Journal of the American Medical Association shows that people with higher levels of BPA in urine have more medical conditions.
Another interesting study in 2008 showed that,-
At normal exposure level--
Destroy hormones associated with insulin sensitivity and diabetes.
A 2007 study showed that obese people are more likely to suffer from insulin resistance if they have a high fat content.
"Imagine if we think that what obesity is causing is actually caused by persistent organic matter in fat in obese people," said Stahlhut . ".
"If they don't have organic matter, they don't have diabetes.
This will be huge.
"But first of all.
Stahlhut agreed with Cienki that his study was not a reason for any form of incitement.
He called for experiments with strict control to understand what will happen to people for a long time
Exposure to BPA for a long time.
He also urged research to measure BPA in human fat tissue.
He believes that there is an urgent need to find new and potentially important sources of BPA exposure.
Stahlhut and his colleagues reported their findings in the January.
28 online issues with the view of environmental health.
Comments by Louise Zhang©2005-2008 WebMD, LLC.