It claims 3,600PPM. It comes in a little 1 ounce bottle with built in dropper. I use it by putting 30 drops in 1 cup of distilled water. Then I test it for PPM. After adding the 30 drops, it is 10 PPM. Suggested serving is 20 drops, three times a day. It does not say how much water or juice to use. I don't do that; unless I have a real problem to deal with that I know colloidal silver will work. When I do, I use 30 drops.
Check out the FAQ.
"True Colloidal Silver is made from real silver particles and ‘suspends’ naturally. NutraSilver is 3,600 ppm. This type of silver is usually dark yellow in color due to the fact that light reflects off of true silver in this color spectrum.
As far as NOAEL and the EPA standards go it is safe to use 930 Bottles of 30ml NutraSilver over a 2 ½ years to meet the 10 gram maximum allowed silver intake."