A new study has demonstrated inter-generational harm resulting from exposure to a commonly used nano_particle, titanium dioxide. It is still unknown to what extent nano-titanium dioxide worn in sunscreens and cosmetics will penetrate healthy, intact adult skin and gain access to the blood stream. However nano-titanium dioxide is commonly used in moisturisers and anti-ageing creams which contain penetration enhancers specifically designed to promote skin uptake of active ingredients. Compromised skin – for example, where someone has pimples, ezcema or sunburn – may not be an effective barrier to particle uptake.
Cosmetics containing nano-particles are still being researched on whether they are beneficial or harmful.