Study: Connection Found Between BPA Exposure, Brain Tumor Diagnosis
July 3, 2012 9:37 AM
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Bisphenol A is considered a toxic substance in some countries because of the hormone-like properties it possess
A new study shows that
bisphenol A exposure
could help cause a brain tumor called meningioma.
Bisphenol A (BPA) is an organic compound that is used to make epoxy resins, polycarbonate polymers and other plastics. It is considered a toxic substance in some countries because of the hormone-like properties it possess.
and the European Union have even banned it from being used in baby bottles.
Now, a new study from China has revealed that BPA could be a risk factor for meningioma brain tumors. They made this connection by studying 247 patients with meningioma and 258 patients with no cancer history. Each patient had their medical records and history collected for the sake of the study.
All patients were observed at the Union Hospital in Wuhan, China. The researchers would check
the brain tumors
with brain scans or biopsies while BPA levels were identified through urine samples.
All volunteers were placed into one of four groups, which were determined by the concentration of BPA levels in urine. The groups consisted of less than 0.53 ng/ml, 0.54-0.91 ng/ml, 0.92-1.69 ng/ml, and over 1.69 ng/ml. They determined whether increasing BPA levels in urine were linked to meningioma diagnosis.
According to the results, patients in the latter three groups with the higher BPA concentrations were 1.4 to 1.6 times more likely to be diagnosed with meningioma than those in the lowest BPA level group. The team also found that the association between the two remained consistent despite other factors like BMI, age and gender.
The study noted that this is the first time a link has been shown between BPA exposure and meningioma diagnosis.
Environmental Health News
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RE: Honest question
7/4/2012 1:25:33 AM
Aluminum and steel cans all have a thin layer of plastic on the inside to protect them from corrosion. I do not know if this plastic contains BPA.
The reason for the plastic is that corrosion in water operates differently from corrosion in air. For aluminum in particular, when it corrodes in air, it forms a thin layer of aluminum oxide, aka corundum, aka rubies and sapphires. It's very hard, practically impenetrable, and does a great job protecting the rest of the aluminum from oxidation (why your aluminum foil sheets stay nice and shiny).
Underwater, it's a completely different story. The aluminum oxidizes with oxygen, and the new aluminum oxide molecule simply floats away in the water. No protective layer develops, and the corrosion continues unabated. So all metal cans which will hold a liquid have a very thin plastic liner on the inside, to keep the water from contacting the metal. (There are a few metals that won't corrode - e.g. gold, platinum - but this trait makes them so valuable in other uses that it's completely impractical to make cans out of them.)
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