I am sure that you have heard that the nanoparticle versions of some commonly use substances have been shown to have a significantly increased toxicity. Part of the problem is that the nanoparticles can be absorbed through the skin and accumulate in the tissues of the body. Zinc oxide is a case in point. Several links are provided below as an example but are not discussed. It is not my intent to create a fear of zinc oxide. In fact, it has been found that coating zinc oxide nanoparticles with dimethicone reduces or eliminates zinc oxide nanoparticle absorption and so most topical lotions or creams containing zinc oxide nanoparticles include dimethicone in the composition for this purpose.
However, silver nanoparticles have been identified in the studies as particularly harmful because of their high reactivity. Concerned about the possible accumulation of silver particles in the brain, I had mostly converted to using purely ionic silver. But based on the study I have previously posted on, High Chemical Reactivity of Silver Nanoparticles Toward Hydrochloric Acid, I don't think that is necessary since silver nanoparticles do not survive the stomach's acid as particles. However it may be prudent to use CS that is primarily ionic for nasal sprays and nebulizing since any particles in the solution are not converted by stomach acid. I think that the study, High Chemical Reactivity of Silver Nanoparticles Toward Hydrochloric Acid, is of ground breaking importance. It completely changes the heretofore understanding of how colloidal silver particles act in vivo. - Steve N http://www.merid.org/ndn/more.php?articleID=1905&search=%2Fndn%2Farchive .php%3FdoSearch%3D1%26food_and_agriculture%255B%255D%3DFood&scorePrecent =100 Toxicity of Nanoparticles: Zinc Oxide on the Brain http://www.azonano.com/news.asp?newsID=18214 Zinc Oxide Nanoparticles Used in Suncreens are Toxic to Colon Studies that discuss silver nanoparticle toxicity: http://www.hindawi.com/journals/jt/2009/754810.html On the Toxicity of Therapeutically Used Nanoparticles: An Overview http://toxsci.oxfordjournals.org/cgi/content/full/88/2/412 In Vitro Cytotoxicity of Nanoparticles in Mammalian Germline Stem Cells -- The Silver List is a moderated forum for discussing Colloidal Silver. Rules and Instructions: http://www.silverlist.org Unsubscribe: <mailto:silver-list-requ...@eskimo.com?subject=unsubscribe> Archives: http://www.mail-archive.com/silver-list@eskimo.com/maillist.html Off-Topic discussions: <mailto:silver-off-topic-l...@eskimo.com> List Owner: Mike Devour <mailto:mdev...@eskimo.com>
