Crystal Colloidals iridium is made only from the highest quality, rarest, elemental iridium and ultra-pure water. It is a true colloid, which means you are taking the real thing! These microscopic iridium particles are 20 nanometres in size and have a concentration of 5 ppm. Our colloidal iridium solution contains no fillers or additives. Packaged in pharmaceutical-grade glass. Unlike ionic products, Crystal Colloidals Iridium 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! 💎 Available in 100ml, 250ml, and 1000ml. When the smallest dosage (5ml/day) is taken, the 1000ml bottle lasts 200 days and 66 days when the highest dosage (15ml. day) is taken. The actual dosage depends on the individual need. Crystal Colloidals Iridium tastes like water, although some customers report a slightly metallic taste.