In comparison to other colloidal silver products on the shelves today, silver wings colloidal silver is less expensive because of its potency making it the overall best value! Highest quality: contains pharmaceutical grade colloidal silver and pharmaceutical grade water. Amber color: the true color of a higher PPM pharmaceutical grade colloidal silver is amber, not colorless. Easily absorbed: provides the highest percent of the silver particles at 2nm for optimal absorption. Testing & safety: we specifically use NCS (nano-photon correlation spectroscope) testing. It is the most accurate testing of overall particle size. Colloidal silver particles should range between 1-100nm for safety purposes.10,50,250 or 500 PPM? Many colloidal silver products are of a lower concentration (10 PPM) and the suggested use can exceed 3 fl.oz. or more per day (180 PPM+) for immune support. 1 teaspoon of our 50 PPM suspension is equal to 5 teaspoons of a 10 PPM solution.Suggested use: Adults: 1 teaspoon Children (