Chemosphere:涂防晒霜游泳,小心患癌!

2017-07-03 佚名 转化医学网

一项最新研究表明,如果不想得癌症,就不要在涂着防晒霜时去游泳,因为防晒霜中的一种物质在紫外线作用下可以与水中的氯反应生成有毒物质。

一项最新研究表明,如果不想得癌症,就不要在涂着防晒霜时去游泳,因为防晒霜中的一种物质在紫外线作用下可以与水中的氯反应生成有毒物质。

阿伏苯宗是全世界最著名、最流行的防晒霜成分,它能够有效吸收各种波长的太阳光,从而防止皮肤损伤。

但是来自俄罗斯的科学家发现这种吸收紫外线的化合物在阳光及含氯的水共同作用下会转化为致癌物质。他们在模拟涂防晒霜游泳的实验中发现会产生醛、苯酚、氯化乙酰苯等有毒物质。莫斯科国立大学的研究人员解释说后两者毒性非常大,与致命的肿瘤及不孕不育有关同时此前的一项研究还发现醛类物质由于会干扰人体自然的修复机制,因此也会增加患癌风险。

在水中的转变

该研究首席作者Albert Lebedev博士说道:“基于这些实验,我们认为这个自然状态下安全的物质会在水中转变为非常危险的化合物。尽管目前大多数产品都没有精确的毒理学资料,但是我们知道苯酚、氯化乙酰苯是毒性非常强的化合物。”

“研究任何化妆品中化合物的转变都是很重要的,因为通常情况下它们的产物毒性都超过原来的物质。理论上讲,研究人员可以基于这些实验得到结论,帮助限制甚至禁止某些物质的使用,以保护数百万人的身体健康。”

研究如何进行?

这项研究发表在Chemosphere上,研究人员使用了一种叫做色谱-质谱联用的技术进行了实验研究。这种技术可以精确分析混合物中的复杂化学物质。在这项研究中,他们在游泳者皮肤上涂上防晒霜,并与游泳池中的水接触,然后用阳光进行照射。阿伏苯宗可能在光照的皮肤上发生了分解。

被数百万人使用!!

全世界有数百万人正在使用包含阿伏苯宗的防晒霜。由于结构独特,像阿伏苯宗这样的紫外吸收剂可以吸收紫外线,而这些物质本身是安全的。除了用于防晒霜之外,它们还被用于个人护理产品,如化妆品、润肤霜、唇膏等。

但是英国皮肤基金会发言人Emma Wedgeworth说道:“仔细检查那些将用于皮肤的物质很重要,因此确实需要仔细调查这些问题。但是通常情况下很难判断实验室结果与真实情况的相关性,因为研究中物质的浓度通常与现实生活中接触的浓度存在差别。但是我们确实知道阳光照射与皮肤癌有关,而护肤霜能够降低皮肤癌风险。因此我建议人们不要立刻产生条件反射,不要拒绝使用所有的护肤霜。”

额外的风险

研究人员现在正在研究淡水和海水存在条件下阿伏苯宗是如何分解的。在氯化或溴化程度更高的海水中,阿伏苯宗分解产生的物质可能更多。

如果水中含有铜盐(为使水体变成亮蓝色,许多游泳池中通常加入这类物质),水中就会产生大量三氯甲烷,这种物质会导致肝脏和肾脏功能紊乱,同时还会导致神经系统疾病。

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    2017-07-05 lq0307
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    2017-07-04 184****9840

    学习了谢谢分享

    0

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    2017-07-03 dhzzm

    学习了分享了

    0

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转眼之间天气开始炎热起来,很多爱美女士已经迫不及待地开始使用防晒霜了。近年来,“防晒霜到底对身体有没有害”一直是热门话题,不过即使是“有害论”持有者,一般认为的害处也只是“对皮肤刺激较大、容易堵塞毛孔、容易滋生暗疮粉刺、容易出现过敏症状”等。 近日,青岛农业大学教授沈伟课题组在国际著名学术期刊《纳米毒理学(Nanotoxicology)》上发表研究论文,系统阐述了涂抹在皮肤表面的防晒霜添加剂纳米氧

J Am Osteopath Assoc:防晒霜是导致维生素D不足的罪魁祸首

日前,发表于《美国骨科协会》的文章中指出,全球近10亿人口正在面临缺乏维生素D引起的慢性疾病,而这一切可能是由于防晒霜等带来的日照不足。

J Am Osteopath Assoc:如何有效补充维生素D

夏季来临,防晒霜被认为是保护皮肤防止晒伤的关键。然而,一项最新研究表明,使用防晒霜可能存在一个显着缺点:即它可能会导致维生素D缺乏。