I have been using Coilloidal Silver for well over 10 years to treat any health issues for myself and family and also to treat animals when they are ill .Colloidal Silver is an amazing remedy and even though i make it for myself there has been times when i have been without,this has been mainly due to me having problems with the purity of the distilled water from my previous supplier .I am so happy now to have come across pro colloidal silver site ,Alan has excellent customer service and he is very helpfull and friendly ,i recently needed an emergency supply of colloidal silver to treat a very ill cat whom had been diagnosed with a fatal disease ,and the prognosis was fatal and there was no vetenery cure .I did not want to give up on him and as there was nothing to loose i decided to treat him with colloidal silver.Alan made sure that i received my order the next day and i began treating him immediately ,it took between 2-3 weeks of treatment with pro colloidal silver ,and i am very happy to say that my beautifull cat has made an amazing recovery ,you would not have known that he was gravely ill a few weeks ago ,so thank you Alan i am a very satisfied customer ,and also i am very happy to now buy my distilled water off you as i can rest assured that it is definately a pure ppm