Crystal colloidal copper is an all-natural mineral solution consisting of the smallest copper particles suspended in ultrapure water. This colloidal solution of essential trace elements contains no fillers or additives and is made exclusively from the copper element and water of the highest quality. The particles can be absorbed quickly due to their small size. 💎 Crystal colloidal copper is a 5 PPM solution with an average nanoparticle size of 20 nanometers. The smaller the nanoparticle, the more effective the solution. Packaged in pharmaceutical-grade glass. Unlike ionic products, Crystal Colloidals Copper is very stable, not light-sensitive, and does not need to be kept in the refrigerator after opening. Do not freeze, the colloid will break! Sold in 250 ml and 1000 ml. When using the smallest dosage (5 ml. per day), a 1000 ml bottle lasts 200 days and 66 days when using the highest dosage (15 ml. per day). The actual dosage depends on the individual need.