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Report Shows Nanoparticles in Cosmetics and Sun Care Safe
Posted: June 19, 2008
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Nohynek and the team proceeded to look at the data regarding the effect that particle size may have on toxicity.
"No major difference in the safety profile was observed for micro- and nano- sized particles, and no evidence was found suggesting that nano-sized particles pose greater or qualitatively new hazards," they concluded.
In addition, they note that a significant number of studies that suggest nanosize-specific effects suffered from a fatal flaw in that they did not test the nanosize particle against a control of a larger particle of the same material.
Although the report recognizes the impossibility of disproving all hypothetic risks, it concludes that, "The current weight of evidence suggests that nanomaterials currently used in cosmetics preparations or sunscreens pose no risk to human skin or human health; on the contrary they provide a large benefit to human health by protecting human skin against the adverse effects of UV radiation."
Source: Skin Pharmacology and Physiology, Volume 21, Number 3, 2008, Nanotechnology, Cosmetics and the Skin: Is there a Health Risk?, G.J. Nohynek, E.K. Dufour, M.S. Roberts