Colloidal silver, as opposed to just plain silver, means that submicroscopic silver particles are suspended in a liquid base. Because the silver particles are so tiny, they are thought to penetrate cells and kill pathogens. Colloidal silver touted as treating and preventing an assortment of conditions in both humans and animals due to it's liquid antibiotic, anti-viral and anti-fungal property.
Colloidal Silver is a homeopathic preparation that is GRAS (Generally Regarded as Safe) for topical applications. Silver Shield can be used frequently. 2-3 sprays is often all that is required and the all-natural ingredients make this a safe product to be used just about anywhere.