I question the efficacy of the cranberry pills. They did not work for me. When I tried to do some research as to whether they are supposed to, the only medical studies I found said they were not effective. On the other hand juice does work and has been shown to work.

As Michael Pollan would suggest--eat food. Stay as close to the cranberry as you can get--IvonaDestroi probably has the best approach, although since blueberries also qualify I like to justify a big piece of blueberry pie. Hey, if nothing else, as comfort food, it also does its job