There is plenty of research on colloidal sliver. It comes in many strengths. If you get the 10PPM (parts per million) you can ingest it internally and it will help fight off infections by strengthening your immune system. I use the 500PPM on cuts, cold sores scrapes etc. 500ppm is amber in color because of all the silver in it and if ingested can cause bluing of the eyes and skin. Colloidal silver can kill bacteria, fungus and viruses. It was used back at the turn of the 20th century by physicians to treat eye disease in newborns. So in the right strength it can be used in the eyes. The reason it is not used by modern medicine today, is because you can make it yourself if you needed . Therefore, it cannot be patented so Big Pharma can gouge the public and make huge profits from it. I use it and have for years and find that it produces results much faster and better than certain drugs my Dr. recommends. You can by a sliver cream ointment from the drug store that is really good on burns. As always do your on research and make your own decision.