What the nurse practitioner told me at the time was that it was equivalent to like 100 times (or more, I don’t recall the exact multiple) of cranberry juice. As for as the price, I found prices that were in the $30-45 per bottle range depending upon how many you bought at the time.
Also, the reason why the estrogen cream helps prevent bladder infections is because it prevents vaginal dryness (that’s what vaginal atrophy is) which causes the skin to breakdown and allow bacteria to enter the body/bladder. That’s also why excellent toileting hygiene is extremely important to prevent bladder infections in older women. Hope this helps.