They use animal protien to suspend the "supposed" 5000ppm particles in solution.I highly doubt it would test that high as it is hard to even make 50ppm without getting huge silver particles which is what you don't want. By adding protien stabilizers they diminish the potency of the silver and it tastes horrid. Well made 10ppm is the standard set by Sovereign Silver and has the smallest particle size of any CS on the market. This is what you want if you are buying CS at the healthfood store. Otherwise just make it yourself with a Silverpuppy or Silvergen, save a ton of money, and make great CS for your family and friends.