Featured Research

from universities, journals, and other organizations

Bisphenol A exposures lower in Canadians compared to Americans

Date:
February 27, 2011
Source:
Canadian Medical Association Journal
Summary:
Health Canada's declaration that bisphenol A is a health hazard makes it unique in the world, but it must now follow through with legislation to protect people from exposure. That's the conclusion of a new analysis that found concentrations of bisphenol A in Canadians are lower than for Americans, although the reason for the difference is unknown.

Health Canada's declaration that bisphenol A is a health hazard makes it unique in the world but it must now follow through with legislation to protect people from exposure, states an analysis published in CMAJ (Canadian Medical Association Journal).

Bisphenol A is one of the most commonly manufactured chemicals in the world, with more than three million tonnes produced annually. It is a component of polycarbonate plastic and is found in a wide range of common materials and food packaging. Because of its estrogenic properties and the effects of the chemical on the reproductive systems of animals, there are concerns bisphenol A may have similar negative effects on humans.

Canada invoked the precautionary principle when it became the first country in the world to declare bisphenol A a health hazard in October 2010.

The analysis is based on a recent study of bisphenol A levels in Canadians, the largest of its kind to date. It compares levels to those in Americans. Children and adolescents had the highest levels. These higher levels may be due to exposure through children's toys and baby bottles or possibly because children eat more food relative to their body mass compared with adults.

However, concentrations of bisphenol A in Canadians are lower than for Americans, although the reason for this difference is unknown.

"The comparison between concentrations measured in Canada and US populations are particularly interesting because these two populations are often thought to be demographically similar," writes Dr. Laura Vandenberg, Center for Regenerative and Developmental Biology, Tufts University, Medford, Massachusetts. "Surprisingly, for each age group that was analysed, the concentrations found in Canadians were approximately half those found in Americans." She suggests differences in sources such as food packaging and thermal receipt papers might be a factor.

While the labeling of bisphenol A as a toxic substance is a positive step, "Health Canada continues to maintain that bisphenol A is safe at current exposure levels and does not pose any risk to the general population; regulations to remove bisphenol A from all food-contact sources, or ban it completely, are not yet forthcoming, presenting a conflict that is likely to confuse the public."

"By invoking the precautionary principle, Health Canada has both the power and responsibility to restrict human exposure to bisphenol A; in taking the action to label bisphenol A a toxic chemical, Health Canada now must follow through with strong legislation that will protect the people of Canada from continued exposure" concludes the author.


Story Source:

The above story is based on materials provided by Canadian Medical Association Journal. Note: Materials may be edited for content and length.


Journal Reference:

  1. Laura N. Vandenberg. Exposure to bisphenol A in Canada: invoking the precautionary principle. Canadian Medical Association Journal, 2011; DOI: 10.1503/cmaj.101408

Cite This Page:

Canadian Medical Association Journal. "Bisphenol A exposures lower in Canadians compared to Americans." ScienceDaily. ScienceDaily, 27 February 2011. <www.sciencedaily.com/releases/2011/02/110222121907.htm>.
Canadian Medical Association Journal. (2011, February 27). Bisphenol A exposures lower in Canadians compared to Americans. ScienceDaily. Retrieved September 21, 2014 from www.sciencedaily.com/releases/2011/02/110222121907.htm
Canadian Medical Association Journal. "Bisphenol A exposures lower in Canadians compared to Americans." ScienceDaily. www.sciencedaily.com/releases/2011/02/110222121907.htm (accessed September 21, 2014).

Share This



More Health & Medicine News

Sunday, September 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Sierra Leone's Nationwide Ebola Curfew Underway

Sierra Leone's Nationwide Ebola Curfew Underway

Newsy (Sep. 20, 2014) Sierra Leone is locked down as aid workers and volunteers look for new cases of Ebola. Video provided by Newsy
Powered by NewsLook.com
Changes Found In Brain After One Dose Of Antidepressants

Changes Found In Brain After One Dose Of Antidepressants

Newsy (Sep. 19, 2014) A study suggest antidepressants can kick in much sooner than previously thought. Video provided by Newsy
Powered by NewsLook.com
Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins