MesoSilver is an all natural mineral supplement in the form of nanoparticle colloidal silver. It is atrue colloidal silver, which means the majority of MesoSilver consists of silver particles, not silver ions. Learn more. In fact, it has the highest nanoparticle concentration: 80% particles(typical). Others are only 10%. For more information read When is Colloidal Silver Not A Colloid? Read What is Ionic Silver? to learn what other producers don’t want you know.