Nanocosmetics: Buyer Beware - Is that expensive jar of skin cream on my dresser safe to use? - MIT Technology Review, USA
Cosmetics are among the first consumer products to make use of nanotechnology--or at least to tout its benefits--but nobody, it appears, has a handle on exactly what is in these products, or how those mystery ingredients might affect people's health.
"You've got this situation where people are putting chemicals on the skin when we know very little about [nanotechnology's] safety," says Sally Tinkle of the North Carolina-based National Institute of Environmental Health Sciences, a division of the National Institutes of Health.

The ongoing challenge of determining carbon nanotube toxicity - NanoWerk, USA
It seems that with every new study on the toxicity of nanomaterials there remain more questions afterwards than before. Environmental, occupational and public exposure to engineered nanoparticles will increase dramatically in the near future as a result of the widespread use of nanoparticles for consumer and industrial products. The extent of future exposure to nanoparticles associated with these new products is still unknown. So far only limited data is available regarding carbon nanotube (CNT) toxicity. As a result still not much is known about their impact on biological systems including humans. Discussions regarding the potential risks of their widespread use, as well as their possible positive impact are just beginning to take place.