Ann: Price Fluctuations, page-9

They admit there is no proof zinc oxide nano particles are harmful whatsoever, the public will slowly be educated of this and the stigma removed.
There have also been recent studies proving it is impossible for zinc oxide nano particles to reach our bloodstream.

"Nanoparticles have received some bad press recently by the media, largely based on some publications about other nanotechnology based compounds (Buckminsterfullerene, otherwise known as buckyballs or C-60) that are, however, entirely unrelated to sunscreen active ingredients. The primary question regarding nanoparticle sunscreen ingredients is whether or not they have an increased capacity to cross the skin and get absorbed into the blood. Kabana has not encountered any well controlled scientific experiments or publications that state this to be the case."