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study finds widespread bisphenol a exposure - polycarbonate plastic

by:Cailong     2019-07-21
study finds widespread bisphenol a exposure  -  polycarbonate plastic
OTTAWA—
Found it in the lining of some plastic bottles and tin cans
Maybe in your urine.
A new federal study found that the urine of most Canadians contained a chemical called biphenol.
The Canadian Health Measures Survey released by the Canadian Bureau of Statistics on Monday showed that 91 of Canadians aged 6 to 79 found the chemical.
The study, conducted between 2007 and 2009, analyzed blood and urine samples of more than 80 environmental contaminants and chemicals.
The researchers also found that lead content in people's blood has dropped sharply since the last measurement of lead 30 years ago, while most blood tests showed detectable mercury levels.
But the findings did not alert Health Canada's senior health care advisers.
"We live in a very, very extensive environment where chemicals are used . "
Said Paul.
"So it's not surprising to expose and discover them.
We take all the chemicals seriously, which is why we have taken action.
"But as far as any particular result is concerned, biphenol A is one of them and we will look at them carefully.
But no immediate action is needed.
"This is the first time that the government has measured the concentration of diphenol A nationwide.
This chemical is used to harden plastic in water bottles, canned food liners and hundreds of other household items.
The federal government has banned the sale of polyester plastic baby bottles containing double phenol.
Before the government announced the ban in 2008, many retailers removed plastic water and baby bottles from their shelves as consumers began demanding products that did not contain phenol.
The Canadian Chemical Industry Association urged caution in explaining the latest study.
"Due to advances in Analytical Chemistry, researchers were able to measure very low levels of nature and human --
Manufacturing substances in human fluids and tissues
Usually only one in ten million (
A game of the Olympic Games
Pool size
The group said in a statement.
"Of course, health researchers know that the simple presence of environmental chemicals in a person's body does not mean that it will have an impact or disease on health.
"Some scientists believe that exposure to biphenol A can damage the reproductive and nervous systems and can lead to cancer.
They pointed out dozens of animal studies, although these negative effects were not recorded in human studies.
The survey showed that the average concentration measured was 1.
Their urine is 16 micrograms per liter.
This is consistent with the results of International Studies, which report an average or median concentration of 1 to 3 micrograms per liter.
Canadian studies found that the concentration of BPA in urine in children aged 6 to 11 was higher than in adults aged 40 to 79.
The study found the highest concentration in adolescents.
"Considering this short half --
Life and frequency of detection of oral BPA are high. . .
According to the data, there is continued extensive contact among the Canadian population . "
One of the country's leading toxicology experts said he was not too worried about the findings.
"I don't think we should worry the public about the huge problems there.
I don't think so, "said Dr.
John Gisi, professor at the University of SA province, chair of Environmental Toxicology Studies Canada.
"But at the same time, all chemicals can be toxic.
We know that lead and mercury do have an impact to a very small extent, that we should always be cautious and that we should always be vigilant.
Gully said: "Health Canada will look at the results of the study before deciding whether further action is needed.
But Rick Smith, of the lobby group Environmental Protection Group, predicts that it's only a matter of time before disabling the bischool a in all products sold in Canada.
"The text of this chemical is on the wall," he said . ".
Smith added that he was encouraged by the findings that lead levels in people's blood had dropped.
Although everyone's lead test results were positive, less than a tenth of the concentration reached or was higher than the intervention level of 10 micrograms per significant force.
Lead concentrations were significantly higher in older people and men.
"Family income is low, born outside Canada, living in a residence at least 50 years old, smoking now or before, and drinking at least once a week, which is related to higher income (lead levels)
The researchers said. “Although . . .
Concentration has dropped sharply since the 1970 s
Demographic features, Age of residence and certain lifestyle behaviors are associated with higher levels.
"The study also found that the mercury concentration in their blood was as high as 88.
Mercury concentrations in children and adolescents aged 6 to 19 are lower than those in adults aged 20 to 79.
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