Colloidal silver and serrapeptase. Colloidal silver is the solution of very tiny nanoparticles of silver suspended in water. It has been used in place of strong antibiotics for a long time and is believed to be greatly effective against a vast assortment of viruses and bacteria. Indeed, colloidal silver was used a great deal to treat infections as an antimicrobial agent prior to antibiotics being introduced in the 1940s. Today, Earth Clinic readers depend on colloidal silver to treat a vast assortment of ailments. Colloidal silver can be used topically, inhaled or taken internally. To use topically, combine with 20% DMSO as a carrier and solvent.