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Health

Levels of controversial soap chemical rise

11 August 2010

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

Clean bill of health?

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LEVELS of a controversial anti-bacterial additive present in the urine of people in the US jumped by over 40 per cent in two years.

Last week the Centers for Disease Control and Prevention published data on the levels of 212 chemicals in 2400 volunteers in the US. The average amount of triclosan, a chemical added to soaps and toothpastes to kill fungi and bacteria, had increased from 13 micrograms per litre of urine in 2003-4 to 18.5 μg/l in 2005-6.

Although triclosan can reduce levels of thyroid hormones in animals, the levels…

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