these sites are listed in the top 10 sites that came up when I googled colloidal silver. and I'm really bored with this discussion, so I probably won't have anything else to add to it after this. Sara http://nccam.nih.gov/health/alerts/silver/index.htm http://www.raysahelian.com/colloidalsilver.html http://www.cqs.com/silver.htm