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Tuesday, October 15th, 2013
The chemical compound called bisphenol-A (BPA), which is found in many plastics and food can linings, has been linked to a heightened miscarriage risk in women who struggled to conceive or have experienced repeated miscarriages. The finding comes from a new study presented this week to the American Society for Reproductive Medicine. More from The Associated Press:
The work is not nearly enough to prove a link, but it adds to ‘‘the biological plausibility’’ that BPA might affect fertility and other aspects of health, said Dr. Linda Giudice, a California biochemist who is president of the American Society for Reproductive Medicine. The study was to be presented Monday at the group’s annual conference in Boston. Last month, ASRM and an obstetricians group urged more attention to environmental chemicals and their potential hazards for pregnant women.
BPA, short for bisphenol-A, and certain other environmental chemicals can have very weak, hormone-like effects. Tests show BPA in nearly everyone’s urine, though the chemical has been removed from baby bottles and many reusable drink containers in recent years. The federal Food and Drug Administration says BPA is safe as used now in other food containers.
Most miscarriages are due to egg or chromosome problems, and a study in mice suggested BPA might influence that risk, said Dr. Ruth Lathi, a Stanford University reproductive endocrinologist.
With a federal grant, she and other researchers studied 115 newly pregnant women with a history of infertility or miscarriage; 68 wound up having miscarriages and 47 had live births.
Researchers say it is virtually impossible to avoid exposure to BPA completely. The AP offers some tips on how to minimize exposure:
To minimize BPA exposure, avoid cooking or warming food in plastic because heat helps the chemical leak out, she said. Don’t leave water bottles in the sun, limit use of canned foods and avoid handling cash register receipts, which often are coated with resins that contain BPA.
Image: Food can, via Shutterstock
Get our Everything Pregnancy blogger’s take on the link between BPA and your miscarriage risk here.
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Friday, June 14th, 2013
The chemical compound bisphenol-a (BPA), which is found in plastics and many food containers, has been linked with childhood obesity in girls, according to a new study published in the journal PLOS ONE. BPA has long been associated with health problems in boys and men, including prostate issues, but this study calls the compound a major environmental culprit in obesity among young girls. More from CNN:
[Dr. De-Kun Li, a reproductive and perinatal epidemiologist at Kaiser Permanente in Oakland, California,] and colleagues studied 1,326 school-age children in Shanghai, China, and measured BPA levels in their urine. In girls ages 9 to 12, higher BPA urine levels were associated with a doubled risk of obesity. And as BPA urine levels increased, so did the girls’ obesity risk – measured using their weight in reference to weight distribution in the population.
But strikingly, only girls in this age group were affected, the research showed. Neither girls outside of the 9-12 age range nor boys experienced a risk of being overweight or obese, even with high levels of BPA in their urine.
“Girls seem to be more sensitive to environmental impact, and we don’t know exactly why,” said Li, the lead study author.
Researchers do know BPA is an endocrine-disrupting chemical. It enters the body and mimics estrogen, the main hormone involved in female development.
When BPA acts like estrogen in young girls, it may accelerate the onset of puberty and cause weight gain – thus earning its “endocrine-disrupting” title.
“It is biologically plausible that BPA interferes with your normal hormone process – then your body gets screwed up,” said Li.
In March, a study reported a link between BPA and childhood asthma, and last year, the FDA banned BPA from all baby bottles and sippy cups.
Image: Overweight girl, via Shutterstock
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Monday, March 4th, 2013
Exposure to the chemical bisphenol A, which is found in some plastics, food cans, and a number of other consumer products, has been linked with a higher risk of childhood asthma, a new study conducted by researchers at the Columbia Center for Children’s Environmental Health has found. More from CNN:
A child’s chances of suffering with asthma were increased if BPA was detected in their urine samples at ages 3, 5 and 7. In addition, when BPA was measured in urine at age 3, the chances of wheezing by ages 5 and 6 were increased. Same thing for 7-year-olds: BPA meant later problems with wheezing.
An exception to the findings occurred among children with BPA measured in their urine at 5 years of age; those children did not have problems with wheezing during follow-ups one or two years later.
“What is important is that we were seeing the association at routine low doses of exposure,” said Dr. Kathleen Donohue, the lead study author.
One anomalous finding in the study, published Friday in the Journal of Allergy and Clinical Immunology: If BPA was detected in a mother’s urine during her third trimester of pregnancy, there was less likelihood that her child would have breathing problems at age five – the opposite of what researchers expected.
Government agencies consider BPA to be a product of concern, but have stopped short of banning it in all consumer products. Last year, the FDA banned BPA from all baby bottles and sippy cups.
Image: Child with asthma, via Shutterstock
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Wednesday, September 19th, 2012
A new study is reporting that bisphenol A (BPA), a chemical found in some plastics and food cans, may, in addition to causing a host of health risks, raise the risks that children will become obese. Though BPA has been removed from many plastic children’s toys, bottles, sippy cups, and food packages, it has not been banned from use.
In a nationally representative study of nearly 3,000 children and teens, researchers found that kids with the highest levels of BPA in their urine were 2.6 times more likely to be obese compared to those with low levels of the chemical. The report was published in the latest issue of the Journal of the American Medical Association.
It’s the latest evidence that obesity might be affected by more than just diet and exercise, said Dr. Leonardo Trasande, a professor of pediatrics and environmental medicine at the New York University School of Medicine.
“Clearly poor diet and lack of physical activity contribute to increased fat mass, but the story doesn’t end there,” he said.
Image: Childhood obesity sign, via Shutterstock
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Wednesday, July 18th, 2012
The chemical compound bisiphenol-A, otherwise known as BPA, can no longer be used to make baby bottles and sippy cups because of health and safety concerns, the Food and Drug Administration has announced. Every major manufacturer of bottles and sippy cups has already stopped using BPA, and parents are familiar with “BPA Free” labels on those and other plastic products.
MSNBC.com reports on the ruling, which was requested by the U.S. chemical industry’s chief association, the American Chemistry Council in October:
The chemical industry’s request may help curb years of negative publicity from consumer groups and head off tougher laws that would ban BPA from other types of packaging because of health worries.
Legislation introduced by some members of Congress would ban BPA nationwide in all canned food, water bottles and food containers. Chemical makers maintain that the plastic-hardening chemical is safe for all food and drink uses.
BPA is found in hundreds of plastic items from water bottles to CDs to dental sealants. Some researchers say ingesting the chemical can interfere with development of the reproductive and nervous systems in babies and young children. They point to dozens of studies showing such an effect from BPA in rodents and other animals.
But the FDA has repeatedly stated that those findings cannot be applied to humans. The federal government is currently spending $30 million on its own studies assessing the chemical’s health effects on humans.
Image: Baby bottle, via Shutterstock.
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