Many people drink cranberry juice to prevent UTIs, but there's no proven evidence that cranberry juice works to treat or prevent infection. Researchers continue to study the ability of cranberry juice or tablets to prevent UTIs, but results aren't conclusive.
If you enjoy drinking cranberry juice and feel it helps you, there's little harm in it. Just watch the calories. For most people, drinking cranberry juice is safe, but some people report an upset stomach or diarrhea.
However, don't drink cranberry juice if you're taking blood-thinning medication, such as warfarin (Coumadin, Jantoven); medications that affect the liver; or aspirin.
Nov. 30, 2016
- Bennett JE, et al. Urinary tract infections. In: Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 8th ed. Philadelphia, Pa.: Saunders Elsevier; 2015. https://www.clinicalkey.com. Accessed April 20, 2015.
- Urinary tract infections in adults. National Institute of Diabetes and Digestive and Kidney Diseases. http://kidney.niddk.nih.gov/KUDiseases/pubs/utiadult/. Accessed April 15, 2015.
- Bacterial urinary tract infections. Merck Manual Professional Version. http://www.merckmanuals.com/professional/genitourinary-disorders/urinary-tract-infections-uti/bacterial-urinary-tract-infections. Accessed April 23, 2015.
- Grabe M, et al. Guidelines on urological infections. European Association of Urology. http://uroweb.org/guideline/urological-infections/. Accessed April 20, 2015.
- Hooton TM, et al. Acute uncomplicated cystitis and pyelonephritis in women. http://www.uptodate.com/home. Accessed April 20, 2015.
- Cook AJ. Decision Support System. Mayo Clinic, Rochester, Minn. April 22, 2015.
- Geerlings SE, et al. Prevention of recurrent urinary tract infections in women: Antimicrobial and nonantimicrobial strategies. Infectious Disease Clinics of North America. 2014;28:135.
- Hooton TM, et al. Recurrent urinary tract infection in women. http://www.uptodate.com/home. Accessed April 20, 2015.
- Jepson RG. Cranberries for preventing urinary tract infections. Cochrane Database of Systematic Reviews. http://onlinelibrary.wiley.com/doi/10.1002/14651858.CD001321.pub5/abstract. Accessed April 20, 2015.
- Cranberry. National Center for Complementary and Integrative Health. https://nccih.nih.gov/health/cranberry. Accessed April 20, 2015.
- Newman DK, et al. Office-based behavioral therapy for management of incontinence and other pelvic disorders. The Urologic Clinics of North America. 2013;40:613.
- Castle EP (expert opinion). Mayo Clinic, Phoenix/Scottsdale, Ariz. Nov. 1, 2016.
- Marnach ML (expert opinion). Mayo Clinic, Rochester, Minn. May 24, 2015.
- Juthani-Mehta M, et al. Effect of cranberry capsules on bacteriuria plus pyuria among older women in nursing homes. JAMA. In press. Accessed Oct. 31, 2016.