To those interested in CS, I would suggest to search with google search engine. Just type Colloidal Silver . There are so many websites with really good information. I make my own CS at home, with a home-made generator and I thinik it's working fine. The particles are so almost invisible that I don't think it accumulates in the body and do harm. However, I'm not an expert on the subject, but I do know that it works for burning eyes caused by allergies, any insect bite and I even put a few drops in my ear when I have an infection, and of course, the best way, drink it!!