Silver Wings Colloidal Silver 500PPM Spray

Highest quality: contains colloidal silver and water. Amber color: the true color of a higher PPM 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. What is PPM? PPM (parts per million) equals the number of silver particles per serving. 50,150,250&500 PPM are strength levels. 10 PPM formulas may require frequent suggested daily dosage.