I have been taking Mesosilver for about six months. I have MS and frequent UTIs. Finally, the urologist wanted to implant a "bladder pacemaker." I did not want to go that route. Since I have been taking Mesosilver I have not had an UTI in the 6 months. I take a tablespoon a day for preventive measures. If I feel one coming on or have some symptoms, I bump it up to 2 tablespoons. Works for me!