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Wednesday, March 16, 2016

Who says BPA is ok and not ok

Different governments are taking different stances on the BPA issue. Some governments are acting conservatively, and banning BPA in some products that contact food. Some governments simply assume BPA is safe without actual evidence.

Who says BPA seems "safe enough"

  1. CDC. "Human health effects are unknown." Technically true, but it's not the whole truth. Animals studies have been an acceptable tool for decades as a model for how a chemical will affect humans, but for one chemical, animal studies suddenly are not good enough?
  2. European Food Safety Authority (archived page).  Tolerable Daily Intake should be limited to 0.05 milligram/kg body weight (bw). The EFSA studied glyphosphate alone, and not actual glyphosphate formulations used in the field. Others scientists consider the additives to Roundup formulations might be even more dangerous to humans.
  3. FDA, 2014-06-06. BPA a-ok in small amounts. "We reassure consumers that current approved uses of BPA in food containers and packaging are safe."
  4. Food Standards Australia New Zealand, 2009-05. "BPA belongs to a group of substances which can act in a similar way to some hormones and as such are sometimes called ‘endocrine disruptors’. Some studies in laboratory animals suggest that low levels of (consumed) BPA may have an effect on the reproductive system.   Similar consequences in consumers at these low concentrations are considered unlikely because  BPA is rapidly inactivated and then excreted in the urine."
  5. Netherlands, 2008-11. The Dutch Food and Consumer Product Safety Authority (VWA) stated in a newsletter that baby bottles made from polycarbonate plastic do not release measurable concentrations of bisphenol A and therefore are safe to use.
  6. NIOSH (part of CDC), skin notation profile, 2011.  "No studies of BPA in humans or experimental animals following dermal exposure were identified."
  7. UK: BPA not a concern.
  8. WHO, 2011: no need to regulate BPA.

Who says BPA is potentially dangerous

  1. Breast Cancer Fund. Link to page. Last accessed Apr 2, 2016. 
  2. Canadian gov't moves to take action, 2006. Canadian gov't takes action even though they say on this same page, paragraph 1, "the general public does not need to be concerned".
  3. Canadian gov't, 2010.  Canada adds BPA to toxic substances list.
  4. Environmental Defense of Canada. Last accessed Apr 1, 2016. "Bisphenol A (BPA) is a harmful chemical found in many products we use every day, including the linings of food and drink cans, cash register receipts, and reusable sports bottles made from hard plastic. More than 150 peer-reviewed scientific studies have found potential health effects from exposure to BPA, which include breast and prostate cancer, attention deficit hyperactivity disorder, and a wide range of developmental problems." Web page here
  5. CDC, 2003-2004. CDC finds BPA in almost all of 2500 urine samples tested. Fourth National Report on Human Exposure to Environmental Chemicals (Fourth Report), National Health and Nutrition Examination Survey (NHANES) during 2003–2004. This PDF appears to be exactly how the NHANES urine study was conducted.
  6. Chemical and Engineering News, 2008-04. Canada proposes banning BPA in baby bottles. Full article not free. 
  7. Denmark, Belgium want to ban BPA in baby bottles. 
  8. Environmental Working Group's articles on BPA. 
  9. EU bans BPA in all baby bottles, 2011-01. 
  10. France, 2016-02. France announced that it intends to propose BPA as an EU Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH Regulation) candidate substance of very high concern (SVHC).
  11. Health Canada. Screening Assessment for The Challenge. Phenol, 4,4' -(1-methylethylidene)bis-(Bisphenol A). Chemical Abstracts Service Registry Number 80-05-7. Environment Canada. Health Canada. October 2008. Link to paper.  Last accessed Apr 2, 2016.
  12. Our Stolen Future. BPA. Link to site. Last accessed Apr 2, 2016.
  13. Bisphenol A. Toxipedia. Last accessed Apr 2, 2016. 
  14. Turkey bans BPA from baby bottles in June 2011.
  15. West Virginia School of Medicine. Anoop Shankar and Srinivas Teppala, “Urinary Bisphenol A and Hypertension in a Multiethnic Sample of US Adults,” Journal of Environmental and Public Health, vol. 2012, Article ID 481641, 5 pages, 2012. doi:10.1155/2012/481641.  Link to abstract. Full article is free and is available as EPUB, HTML, XML or PDF.  When controlling for variables, they found a positive correlation between BPA levels and hypertension rates.
As you can see, many people cannot agree if BPA poses a hazard or not. 

More Links

  1. HHS page on BPA
  2. Some info from Wikipedia article on BPA.

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