it is more reactive than the other precious metals. the theory behind the current work in CS is that the particles are so small that they can pass in and out of cells and out of the body through normal channels without being blocked and stored. i am operating under this assumption or i would not think about ingesting it again. what might change this would be the possibilty of silver coumpounds being created in the body and those compounds being stored. i am hoping it aint gonna happen. i have no evidence of it so far after three years.