Colloidal Silver is a heavy metal and builds up in the liver and destroys all the bodies glutathione. Pungent aromatic herbs like chamomile, horseradish, olive leaf, etc will kill the gram negative bacteria that is likely the cause of your recurrent uti's. The reason they recur is you have a chronic low level infection and when it gains the upper hand vs the immune system it flares up. Kill the bacteria for good to stop the cycle.