Argentyn 23 (Colloidal Silver). Colloidal Silver has been around for over 115 years with countless indications and in various forms. Argentyn 23 represents the ultimate refinement of Colloidal Silver. It contains 98% positively charged silver in pharmaceutical grade purified water. It can be used topically, orally or even injected. I use it for all types of infections including, viral, fungal and bacterial. Excellent for food poisoning, as an oral rinse (I brush my teeth with it), and to enhance the immune system.