Article by Fiona Macrae, http://www.dailymail.co.uk

Hair dyes used by millions of women contain chemicals linked to cancer, British scientists have warned.

They say that both home hair colouring kits and the dyes used at expensive salons pose a potential risk to health.

Writing in a respected scientific journal, they say chemicals in permanent hair dyes can react with tobacco smoke and other pollutants in the air to form one of the most powerful cancer-causing compounds known to man.

Article by Anusuya Suresh, www.thehealthsite.com ill about a few decades ago, grey hair was a sign that you had grown older and probably wiser, too. However, in today’s times, grey hair is more likely to be an indication of your stress levels, having nothing much to do with age or wisdom. This greying of hair is a condition that cannot be reversed, but can be effectively concealed by the use of hair colours.

Article by www.cancer.org

Hair Dyes
Many American women, as well as a small but increasing number of men, use hair dyes. You may have heard rumors about a link between using hair dye and getting cancer. Many studies have looked at hair dyes as a possible risk factor for various types of cancer. Here we will discuss what the research shows so that you can make choices that are comfortable for you.

化学剂染发 慎防淋巴癌
二零一二年六月二十二日 上午十一时三十七分

担心染发威胁你的生命？

药草染发剂与化学染发剂

染发是一个古老的艺术。在古代，染料从植物中获得。一些知名的染料有如以下，

指甲花 (henna)
靛青 (indigo)
番瀉葉(senna)
姜黄 (turmeric)
油甘子 (amla)
其他包括黑核桃壳 (black walnut hulls)，赭红色 (red ochre)。

化学染料的发展可追溯到1860年发现的PPD与空气产生的化学反应，如今，染发剂已是大家熟悉的产品。

染发的副作用

化学染发剂的原理是使用化学物质去除，更换和掩盖发干内的自然色素。使用这类化学染发剂会导致多项不良影响，这包括头皮过敏，发根断裂和发质变色等。