Inorganic nanoparticles in dermop…d regulatory issues.

This comprehensive review found that inorganic nanoparticles like titanium dioxide and zinc oxide are increasingly used in cosmetics—especially sunscreens—because they're cheaper, more stable, and cause less irritation than alternatives. However, the researchers emphasize that safety concerns exist: toxicity to humans and environmental impact need careful evaluation, and regulatory oversight varies globally, meaning what's approved in one country might not be in another.