I originally heard about ACS200 while watching a Youtube video where Dr. Garry Gordon was talking about it. After looking into it further, I became a convert. A lot of holistic doctors use it, and Dr. Gordon says that he rarely has to prescribe antibiotics anymore, now that he uses high-dose vitamin C and ACS200 on his patients.And the best part is, there are tons of killtime studies on their website, showing you exactly what pathogens this has been tested on. In addition, there are over 500 university studies done on this, in the last decade alone, so it's the real deal.I think this is an essential part of a natural medicine toolkit for any household.