Vaccinium macrocarpon · Fruit
Cranberry
Studied in peopleA native North American berry, cranberry was used by Indigenous peoples for food, dye and folk remedies long before it became a holiday table staple.
Traditionally used for
- Traditionally used by Native American peoples as food and in poultices
- Long used in American folk practice to support urinary tract comfort
What research says
NCCIH reports that cranberry products may help reduce the risk of repeat urinary tract infections in some groups, such as women with recurring UTIs, but they are not a treatment for an active infection.
How people use it
- Unsweetened juice diluted with water
- Whole or dried berries in oatmeal and baking
- Fresh cranberry relish
Safety and interactions
- Large amounts of juice can cause stomach upset and add sugar
- People who take warfarin should talk with their doctor
- See a doctor promptly for any suspected infection
Always talk with your doctor or pharmacist before using cranberry as a supplement, especially with prescription medicine, in pregnancy or before surgery.
Sources
Reviewed October 25, 2026. Evidence tier: Studied in people: Human studies summarized by NIH NCCIH suggest a possible benefit for a specific use. How we rank evidence.