Woodstock Herbal Products colloidal silver products are true colloidal silver, not ionic silver made with electrolysis. They are made using a proprietary chemical process that produces colloidal silver with a complete valence electron shell. Woodstock Herbal Products colloidal silver products consist of finely divided particles, approximately 10 to 10,000 angstroms in size. These nano-particles are suspended in purified, de-ionized water. Additional Details ------------------------------ Product description: Woodstock Herbal Products colloidal silver products are true colloidal silver, not ionic silver made with electrolysis. They are made using a proprietary chemical process that produces colloidal silver with a complete valence electron shell. Woodstock Herbal Products colloidal silver products consist of finely divided particles, approximately 10 to 10,000 angstroms in size. These nano-particles are suspended in purified, de-ionized water.