MeiMei, tudi jaz sem posurfala o nanomaterialu (poimenovanje v dokumentih EU), ker o njih nimam pojma, razen tega, da sem slišala neko mnenje, da so problematični/rakotvorni/nevarni. Če imamo kje že odprto temo o tej zadevi, me prosim, preusmerite. Vse, ki se na zadevo bolj spoznate ali ste iz stroke, prosim, da poveste, če sem kaj zgrešila. Sama trenutno nimam pomislekov o tem, da si kreme z nano delci ne bi kupila. Pdf linkov mi noče vstaviti, zato so prilepljeni v besedilo (preglednost je žal manjša).
Nanodelci oz. nanomaterial so po mnenju EU varni za zdravje, če se jih ne vdihuje (prepovedana je uporaba v spreju in prahu). Evropska komisija je izdala kratko navodilo glede cinkovega oksida v nano obliki v sončnih kremah, v katerem zatrjuje, da je varen za zdravje; http://ec.europa.eu/health/scientific_committees/docs/citizens_zinc_oxide_en.pdf
Obstaja tudi daljša študija; http://ec.europa.eu/health/scientific_committees/consumer_safety/docs/sccs_o_103.pdf
In še študija o titanijevem dioksidu; http://ec.europa.eu/health/scientific_committees/consumer_safety/docs/sccs_o_136.pdf
V EU je to področje zelo regulirano - Uredba (takrat še) Evropske skupnosti št. 1223/2009 - http://eur-lex.europa.eu/legal-content/SL/TXT/PDF/?uri=CELEX:02009R1223-20130901&qid=1396974431746&from=SL
o nanomaterialu govori v členu 16 (in ostalih), kjer piše, da mora odgovorna oseba za določen kozmetični izdelek, ki vsebuje nanomateriale, v elektronski obliki obvestiti Komisijo šest mesecev preden se ti dajo na trg in med drugim sporociti specifikacijo nanomateriala, vkljucno z velikostjo delcev, fizikalnimi in kemijskimi lastnostmi; toksikološki profil nanomateriala; varnostne podatke o nanomaterialu povezanih s kategorijo kozmeticnih izdelkov, v katerih so uporabljeni, etc. Če ima Komisija pomisleke v zvezi z varnostjo nanomateriala, potem SCCS (Scientific Committee on Consumer Safety) razišce zadevo in se ukrepa.
Environmental Working Group, nevladna organizacija, ki se ukvarja s toksičnimi kemikalijami,
na svojih straneh piše tako: "A recent real-world study tested penetration of zinc oxide particles of 19 and 110 nanometers on human volunteers who applied sunscreens twice daily for five days (Gulson 2010). Researchers found that less than 0.01 percent of the zinc from either particle size entered the bloodstream. Separately, a European Union review found that sunscreen users did not demonstrate elevated blood zinc levels (EU 2012).
Studies of titanium dioxide skin penetration by the FDA and the European Union drew similar conclusions (NanoDerm 2007, Sadrieh 2010). The study included skin samples from patients with psoriasis, a skin disorder in which living skin cells are found on the skin surface. Even in these tests, there was no evidence that titanium dioxide threatened living skin cells (NanoDerm 2007)."
Na strani PC pišejo takole (navajajo tudi vire): "Reviews of scientific data by major regulatory agencies have concluded that nanoparticles of titanium dioxide and zinc oxide remain on the surface of the skin and in the outer dead layer (stratum corneum) of skin. They are not absorbed into the bloodstream and do not affect living skin cells. Studies coming to these conclusions have tested these nanoparticles on healthy, intact human skin and on various types of human and animal skin samples."
In tole: "Based on these conclusions and those of other studies we have reviewed from toxicologists, the question of nanoparticle risk from the mineral sunscreen actives is not a human health issue."
Pa kaj zdej to, a bo treba miljavžnt izdelkov pregledat, da se najde enega brez in s kolikor toliko normalnimi sestavinami? 
