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[影片] 抗菌肥皂含三氯生,將產生過敏體質

抗菌香皂中含有一種名為“三氯生”的化學物質,而洗得太乾淨真的對我們的健康有好處嗎?
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據美國《每日科學》雜誌近日報道,美國最新研究發現,抗菌香皂中含有一種名為“三氯生”的化學物質,過多使用抗菌香皂會增加青少年罹患過敏性疾病的風險,並損害成年人的免疫系統。
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三氯生廣泛應用於抗菌香皂、牙膏、鋼筆、尿布、醫療設備等產品,它和另一種化合物“雙酚A”(存在於塑膠和食品容器的密封條中)都屬於一種名為“內分泌干擾劑”的環境毒物,醫學界已經確認這類毒物會通過模擬或干擾激素的作用損害人體健康。 soap-diy.com 7 _8 |# J3 x* r, H; [6 b9 l; N
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在2003至2006年的美國國家衛生和營養調查中,密歇根大學的研究人員抽樣對比了美國成年人和6歲以上兒童的尿中巨細胞病毒(CMV)抗體的含量水準,以及過敏/花粉熱的發病率。CMV抗體和過敏/花粉熱的發病率被視為人體免疫水準的兩個指標。
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7 V6 ?' l8 b, V5 g9 k/ L soap-diy.com “我們發現年齡在18歲以上的高水準雙酚A接觸者體內CMV抗體的水準更高,這說明他們的細胞介導免疫系統功能可能會出現異常,”密歇根大學公共衛生學院的研究人員克萊頓說。研究人員同時發現18歲及以下的高水準三氯生接觸者罹患過敏症或花粉熱的風險更高。 soap-diy.com 9 p6 `( _2 C$ t3 W4 k, N/ _

5 z! P1 s8 _( m8 @ soap-diy.com 密歇根大學公共衛生學院副教授艾洛表示:“這項研究發現支援了衛生假設理論,該理論認為生活在非常清潔衛生的環境中減少了我們接觸微生物的機會,而這可能會影響人體免疫系統的正常發育。換言之,太愛乾淨反而更容易讓我們生病。”
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三氯生介紹  http://zh.wikipedia.org/zh-tw/%E4%B8%89%E6%B0%AF%E7%94%9F soap-diy.com ' h4 k8 W% w* o
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轉載自
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美國密歇根大學 (2010, November 30). Antibacterial soaps: Being too clean can make people sick, study suggests. ScienceDaily. Retrieved December 7, 2010, from http://www.sciencedaily.com/releases/2010/11/101129101920.htm soap-diy.com / I6 ]% L2 q$ h1 X7 _

8 o7 [: A3 K* b& i6 L soap-diy.com ScienceDaily (Nov. 30, 2010) — Young people who are overexposed to antibacterial soaps containing triclosan may suffer more allergies, and exposure to higher levels of Bisphenol A among adults may negatively influence the immune system, a new University of Michigan School of Public Health study suggests. soap-diy.com 2 F: W+ f; y( V: X
Triclosan is a chemical compound widely used in products such as antibacterial soaps, toothpaste, pens, diaper bags and medical devices. Bisphenol A (BPA) is found in many plastics and, for example, as a protective lining in food cans. Both of these chemicals are in a class of environmental toxicants called endocrine-disrupting compounds (EDCs), which are believed to negatively impact human health by mimicking or affecting hormones.
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Using data from the 2003-2006 National Health and Nutrition Examination Survey, U-M researchers compared urinary BPA and triclosan with cytomegalovirus (CMV) antibody levels and diagnosis of allergies or hay fever in a sample of U.S. adults and children over age 6. Allergy and hay fever diagnosis and CMV antibodies were used as two separate markers of immune alterations. soap-diy.com 4 q3 x" t; N: a( [( m. _
"We found that people over age 18 with higher levels of BPA exposure had higher CMV antibody levels, which suggests their cell-mediated immune system may not be functioning properly," said Erin Rees Clayton, research investigator at the U-M School of Public Health and first author on the paper. soap-diy.com 0 ^$ M/ G3 f1 h/ H
Researchers also found that people age 18 and under with higher levels of triclosan were more likely to report diagnosis of allergies and hay fever.
' f* Q  t1 K3 F1 T9 \ soap-diy.com There is growing concern among the scientific community and consumer groups that these EDCs are dangerous to humans at lower levels than previously thought.
  b, Y; m6 j+ m1 O4 g+ S9 S soap-diy.com "The triclosan findings in the younger age groups may support the 'hygiene hypothesis,' which maintains living in very clean and hygienic environments may impact our exposure to micro-organisms that are beneficial for development of the immune system," said Allison Aiello, associate professor at the U-M School of Public Health and principal investigator on the study. soap-diy.com 8 z0 S: U/ {  U! s6 O7 r
As an antimicrobial agent found in many household products, triclosan may play a role in changing the micro-organisms to which we are exposed in such a way that our immune system development in childhood is affected. soap-diy.com 8 q& k, M6 c( e
"It is possible that a person can be too clean for their own good," said Aiello, who is also a visiting associate professor of epidemiology at Harvard.
7 x5 H' r" L. F$ O' D2 { soap-diy.com Previous animal studies indicate that BPA and triclosan may affect the immune system, but this is the first known study to look at exposure to BPA and triclosan as it relates to human immune function, Aiello said.
; A, T* l# o! T: O% N" Z soap-diy.com One surprise finding is that with BPA exposure, age seems to matter, said Rees Clayton. In people 18 or older, higher amounts of BPA were associated with higher CMV levels, but in people younger than 18 the reverse was true. soap-diy.com : G8 Z9 }0 Y! }9 b4 W
"This suggests the timing of the exposure to BPA and perhaps the quantity and length of time we are exposed to BPA may be affecting the immune system response," Rees Clayton said. soap-diy.com $ C6 ?0 V' Z: L. e3 L
This is just the first step, she said, but a very important one. Going forward, researchers would like to study the long-term effects of BPA and triclosan in people to see if they can establish a causal relationship.
* r/ y% ?: U) `) x+ D* W) a soap-diy.com One limitation of the study is that it measured disease and exposure simultaneously and thus shows only part of the picture, Aiello said. soap-diy.com   B% K3 H/ {8 _! s; [: n
"It is possible, for example, that individuals who have an allergy are more hygienic because of their condition, and that the relationship we observed is, therefore, not causal or is an example of reverse causation," Aiello said.

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