TGA issues verdict on sunscreen safety
The TGA has given zinc oxide (ZnO) and titanium dioxide (TiO2) a clean bill of health as sunscreen ingredients.
It says they are unlikely to be harmful when sunscreens are used as directed.
A TGA report says most in vitro studies - using both animal and human skin - and in vivo studies show that ZnO and TiO2 nanoparticles either did not penetrate or minimally penetrate the stratum corneum and underlying layers of skin.
“This suggests that systemic absorption, hence toxicity, is highly unlikely.”