Silver Colloidal is primarily a mineral supplement. Taking enough of this supplement can help the body's natural immune system function better in overcoming a health crisis. (Much like Linus Pauling discovering Large doses of Vit C will help the body with the common cold) The FDA is cracking down on product claims of a cure or killing bacteria or viruses - Hop in for Health does not refer to Silver Colloidal as a natural antibiotic or that it kills microorganisims - it IS A Mineral Supplement - That does help the body's own immune system defences fight ailements.