About this item Professional colloidal silver immune support* formula maintaining, sustaining, and supporting the immune system* Unparalleled purity containing only 2 ingredients: 99.999% pure silver and pharmaceutical-grade water Offers improved absorption* with greater that 98% bio-active silver and an ultra-fine particle size as small as 0.8 nm (nanometers) Bio-Active Silver Hydrosol is perfectly safe* and formulated for the whole family Since 1999, Argentyn 23 has been at the forefront of developing high-quality mineral supplements that help others take control of their wellbeing.