Silver is regulated as a dietary supplement by FDA as described in the Dietary Supplement Health and Education Act (DSHEA), therefore all official references to use must be for oral ingestion. The product contains pharmaceutical-grade purified water and 10 parts-per-million silver. Trace amounts of silver are already in the water you use for bathing, clearing debris from your eyes, drinking and brushing your teeth. Silver is found in spring water, sea water and tap water. The water used in Sovereign Silver is much more pure than that which comes out of the tap, which people splash in their eyes on a daily basis without incident. Sovereign Silver First Aid Gel is the product we offer for external use.