I been making my own for 3 years, havn't missed very many days drinking the Colloidal silver. The year before I started using Colloidal silver I had 3 colds, since using Colloidal silver, have not had a cold. My wife has had good results, she was on celebrex for pain but since using Colloidal silver, she has taken no more celebrex. My wife has not had as good of results as I have, she averages about one sinus infection a year. I bought my cs gererator 3 year ago off a web site for $39.