From the EDS forum:
http://www.essential...p=528790#528790
"In simple English, Zinc Oxide and Titanium Oxide regardless of the size of the particles sit on the surface of the skin. Free radicals are not an issue because the Stratum Corneum is composed of dead skin (you can't induce free radical damage to something that is already dead). Although the study cites nanoparticles, some of the references examined looked at micronized particles as well. HTH"
http://www.tga.gov.a...screen-zotd.pdf
