A review of the scientific literature on the safety of nanoparticulate titanium dioxide or zinc oxide in sunscreens
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چکیده
There is evidence from isolated (in vitro) cell experiments that ZnO and TiO2 may induce free radical formation in the presence of light and this free-radical generation may cause cell damage (photo-genotoxicity with ZnO). However, recent work suggests that the photogenotoxicity seen in these studies (with ZnO) may be due to an UV-induced experimental artifact in an in vitro assay, rather than the presence of the nanoparticles (40).
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