Dietary Supplement. Soy free. Dairy free. Gluten free. Non-GMO. Since 1972. Nano particle. Bio-available. 50 mcg (10 ppm). Nature's Answer offering the Finest Supplements from Our Family to Yours; since 1972. Colloidal Silver produced in our family owned manufacturing facility. Nature's Answer Manufacturing Facility is: USA based; GMP compliant; NSF registered. Nature's Answer Colloidal Silver features a concentration of 10 ppm (parts per million) of high quality elemental colloidal silver; which offers the advantage of ultra small particle size to support easy absorption and excretion. Pure; clean formula featuring only high quality elemental colloidal silver and purified water. Nature's Answer Colloidal Silver particle size are verified to be in the nano rage size making it a true nano size colloidal silver. Glass Bottles - protect the silver solution from plastic leaching and degradation. www.naturesanswer.com. For product information; call (800) 439-2324. (This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose; treat; cure; or prevent any disease.)