Probiotics, cranberries, vitamin C and D-mannose are all supplements that have been studied for their potential to prevent urinary tract infections. There is a plausible mechanism for each of them; however, studies have not consistently shown marked benefit. More evidence is needed to make a final recommendation for or against their use or efficacy.
Cranberry Pills vs. Cranberry Juice for UTI
Cranberry extract pills are more likely to be helpful than cranberry juice, since cranberry pills do not have the sugar that juice contains. Cranberry can contribute to heartburn and gastrointestinal upset.