02 Dec '11, 3pm

Toxic cosmetics? It's all about the dose: But now, it turns out, scientists from Nanyang Technological Universit...

By Grace Chua Reporter [email protected] In sunny Singapore, we've all been told: Wear sunscreen. It's good for your skin. But now, it turns out, scientists from Nanyang Technological University have found that nanoparticles of zinc oxide, a substance used in many sunscreens and cosmetics, can cause a chain-reaction cascade that leads to cancer in lab-grown cells. Cue alarm and frantic consumers saying: But I thought it was natural! So is zinc oxide, that innocuous-looking white smear across a sunbather's nose, really a carcinogen? The honest answer is: It depends. Or as doctors might say: It's all about the dose. The links between environmental toxins and the incidence of disease in real life, rather than in the lab, are some of the toughest in the world to prove. This is just because in real life, scientists can't track everything that people wear, eat and smear on themse...

Full article: http://blogs.straitstimes.com/2011/12/02/toxic-cosmetics-...

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