It only works for E. Coli, but as E. Coli accounts for over 90% of bladder infections, it’s a good bet. Multiple well-done studies in PubMed prove its efficacy. Anyone can look it up.
You can order the powder for cheap on Amazon. Mix with water, drink it down a half hour before breakfast every morning to prevent E. Coli UTIs. Worked very well for my elderly parents. But do stay vigilant for UTIs caused by less common bugs.
T/O
I get the brand by Superior Labs from Amazon. Two capsules in the morning, and one capsule at night. It has made a huge difference for me.