Caoye: please write, provide more detailed Bisphenol A information/damage/links in English......Especially for baby boy……how could keep away from it….thanks lot!
- posted on 12/10/2008
1. July, you sound so panicky. Calm down! 我用午饭时间来尽力回帖, 待会儿上班没空儿。BPA 只是很多很多化学物质中的一个, 而环境化学物质又是众多原因里如社会文明等,造成boys adrift里的一小小方面。同意Moab对成人影响应该不大, 对baby的影响在动物实验中已有证实, 人群的数据还不足。当然做妈妈的要保险, 还是不要接触BPA。
见Washington Post 四月份的头版
http://www.washingtonpost.com/wp-dyn/content/story/2008/04/26/ST2008042602242.html
2. 这是Dr.Sax“boys Adrift”里的一个小结 for bpa
http://www.boysadrift.com/blog.php
Certain types of plastics (BPa) leach chemicals into our food and water. There actually are a number of studies which show that substances found in common plastics can act as estrogens in animals and can even decrease those animal's testosterone levels and sperm production. The estrogens effect the male brain differently, by attacking the brain centers that affect motivation. In females, this brain center is not effected. Excess estrogen cause early onset puberty. It's not the hormones in meat, peoples, it's estrogen mimic chemicals that leach out of PBa plastics!
• This increase in estrogen in women not only causes early onset puberty, but puts women at an increased risk of developing breast cancer.
3. 这是Institute of environmental health的林可:有很多具体的报告
http://www.niehs.nih.gov/news/media/questions/sya-bpa.cfm
What is bisphenol A?
Bisphenol A (BPA) is a chemical produced in large quantities for use primarily in the production of polycarbonate plastics and epoxy resins.
Where is BPA found?
Polycarbonate plastics have many applications including use in some food and drink packaging, e.g., water and infant bottles, compact discs, impact-resistant safety equipment, and medical devices. Epoxy resins are used as lacquers to coat metal products such as food cans, bottle tops, and water supply pipes. Some dental sealants and composites may also contribute to BPA exposure.
How does BPA get into the body?
The primary source of exposure to BPA for most people is through the diet. While air, dust, and water are other possible sources of exposure, BPA in food and beverages accounts for the majority of daily human exposure.
Bisphenol A can leach into food from the protective internal epoxy resin coatings of canned foods and from consumer products such as polycarbonate tableware, food storage containers, water bottles, and baby bottles. The degree to which BPA leaches from polycarbonate bottles into liquid may depend more on the temperature of the liquid or bottle, than the age of the container. BPA can also be found in breast milk.
Why are people concerned about BPA?
One reason people may be concerned about BPA is because human exposure to BPA is widespread. The 2003-2004 National Health and Nutrition Examination Survey (NHANES III) conducted by the Centers for Disease Control and Prevention (CDC) found detectable levels of BPA in 93% of 2517 urine samples from people six years and older. The CDC NHANES data are considered representative of exposures in the United States. Another reason for concern, especially for parents, may be because some animal studies report effects in fetuses and newborns exposed to BPA.
If I am concerned, what can I do to prevent exposure to BPA?
Some animal studies suggest that infants and children may be the most vulnerable to the effects of BPA. Parents and caregivers, can make the personal choice to reduce exposures of their infants and children to BPA:
• Don’t microwave polycarbonate plastic food containers. Polycarbonate is strong and durable, but over time it may break down from over use at high temperatures.
• Polycarbonate containers that contain BPA usually have a #7 on the bottom (http://www.recyclenow.org/r_plastics.html)
• Reduce your use of canned foods.
• When possible, opt for glass, porcelain or stainless steel containers, particularly for hot food or liquids.
• Use baby bottles that are BPA free.
- Re: Ask Dr.caoye: why are men more and more Masculinity Besieged?posted on 12/11/2008
Thanks, Dr caoye...
Well, I guess I am too panicky to have a boy :-) - Re: Ask Dr.caoye: why are men more and more Masculinity Besieged?posted on 12/11/2008
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