Silver is a natural antimicrobial which kills bacteria, viruses, fungi/yeasts, molds and protozoa parasites. 30ppm Smart Colloidal Silver is made with our own unique process which produces the smallest silver nanoparticles in the highest concentration of any real colloidal silver (see website for more on this). Greenish yellow color indicates smallest, most effective nanoparticles which persist to keep killing microbes, unlike clear ionic silver. PPM Silver manufactures and direct sells unique, high silver concentration personal care products. Free Shipping in Contiguous 48 United States. Sorry, no international shipments. In-person orders and barter at Salina, Oklahoma, plus several liberty festivals. ***** QUANTITY & PAYMENT DISCOUNTS Add $4 for optional all-plastic spray top which won't diminish silver’s effectiveness. Order with ARRR, QORT or XMR: 1/$33, 2/$59, 3/$85, 4/$110, 5/$133, 6/$154, 7/$173. Other Crypto Orders: 1/$35, 2/$62, 3/$90, 4/$116, 5/$140, 6/$162, 7/$182. Mail Orders using cash, silver, money order or cashiers check (no personal checks): 1/$37, 2/$66, 3/$96, 4/$123, 5/$148, 6/$171, 7/$192. We charge more for credit cards. ***** No, your skin won't turn silver or blue because our silver particles are so small. There are a multitude of uses for our all-natural 30ppm Smart Colloidal Silver. ***** INGREDIENTS 30ppm of Silver Nanoparticles suspended only by Electrical Repulsion in Very Pure Steam Distilled Water. No protein or other contaminates added which reduce effectiveness. ***** STORAGE Smart Colloidal Silver is best kept at a comfortable indoor living temperature on a high wooden shelf, away from electrical items and direct sunlight. Do not allow to freeze.