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Report Shows Nanoparticles in Cosmetics and Sun Care Safe
Posted: June 19, 2008
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Absence of penetration of even smaller nanosized particles-20nm size TiO2-was also confirmed by the EU NANODERM research group, added the scientists led by Dr. G. J. Nohynek from L'Oreal.
TiO2 particles have been found in the hair follicles however, which has been interpreted by some to mean penetration into the living skin. However the particles remained outside the dermis and epidermis, noted the team, who maintain that this does not show penetration into the living skin.
Furthermore, recent data from mice skin studies illustrates that even when TiO2 nanoparticles were injected under the skin, they remained at the injection site and did not migrate.
The scientists therefore conclude that the fear that nanoparticles can penetrate the skin, get access to the lymphatic system and circulate around the organism is 'simplistic and physiologically improbable'.
Toxicity not generally dependent on size