Greenpet Colloidal Silver is 25-30 ppm strength and is 100% safe and natural.  Colloidal silver is a natural substance consisting of positively charged 99.99% quality silver.  This is suspended in a colloidal state in steamed, distilled pure water that is energized with Dow quartz crystal.  Colloidal silver is said to have broad antibacterial and antiseptic effects when taken orally or placed on a wound.

Ingredients: Colloidal Silver.