Colloidal silver has been used as a natural antibiotic for centuries. It kills bacteria, fungus, and viruses, fighting all infection. It is commonly used to clean and disinfect wounds, eyes, and ears, and can be drank for internal infections, such as colds. Regular Strength: 20ppm Extra Strength: 100ppm Colloidal Silver reported functions: - Antibiotic - Antifungal - Antiviral - When taken orally, shown to treat internal infections.