What Is Uva Ursi?

An Herbal Supplement

Uva Ursi tea, tincture, and capsules

Verywell / Anastasia Tretiak

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Uva ursi is an evergreen shrub often referred to as bearberry because bears seem to enjoy eating the plant's red berries. The Latin name uva ursi literally translates to "bear's grapes."

Before the discovery of antibiotics, people used uva ursi as a natural remedy to treat urinary tract infections (UTIs). Today, people are still using this herbal supplement to treat urinary and bladder infections.

This article covers the potential health benefits and side effects of taking uva ursi. You'll also learn the recommended doses to take and what to look for when buying this supplement.

Also Known As

  • Bearberry
  • Beargrape
  • Rockberry
  • Sandberry
  • Kinnikinnick
  • Arctostaphylos adentricha
  • Arctostaphylos coactylis

What Is Uva Ursi Used For?

Herbal supplements made from the leaves of uva ursi claim to help treat cystitis (bladder infections) and UTIs. That's because the plants contain natural chemicals with infection-fighting properties, called glycosides and arbutin.

Glycosides might help reduce the bacteria in your urine. Your body transforms glycosides into hydroquinone, a compound with antibacterial properties.

Uva ursi also contains tannins, which can have an astringent (drying) effect on your tissues. Some people claim that uva ursi's astringent effect can help fight infection by reducing inflammation. But more research is needed to confirm the plant's anti-inflammatory benefits.

A 2017 study published in the journal Trials looked at the effects of uva ursi. The study authors found that combining uva ursi with dandelion root could stop repeat UTIs from occurring. However, the study had a small number of participants.

An older study looked at the skin-lightening effects of applying uva ursi topically (to the surface of the skin). Uva ursi was found to be as effective as a skin lightening cream. In the study, healthy adults were exposed to ultraviolet light after they applied the chemical arbutin from uva ursi. Arbutin blocked darkening of the skin in four out of six adults exposed to ultraviolet light.

Recap

Uva ursi has been used to treat UTIs and to lighten skin. It also may have anti-inflammatory and astringent activity.

Health Benefits

One research review examined 14 over-the-counter products to evaluate each one’s ability to block an enzyme that helps Staphylococcus saprophyticus, a common type of bacteria in the urinary tract, be infectious. This enzyme is called urease.

Only one of the 14 preparations in the study was able to significantly lower urease (by more than 75%). That preparation was uva ursi combined with green tea. 

Another study found that “the antibacterial and astringent benefits [in uva ursi] plus research indicating that uva ursi can effectively treat and prevent urinary tract infections, suggest this herb can be helpful in treating urinary incontinence."

Uva ursi is also known for its diuretic properties—this refers to the body’s ability to flush out fluids, which helps rid the bladder of disease-causing germs. E. coli is a type of bacteria that commonly causes UTIs in females. Research has suggested, therefore, that uva ursi can help prevent E. coli as well.

Recap

There's some research suggesting uva ursi can prevent UTIs. But it's not currently recommended as an effective preventive supplement for long-term use.

Possible Side Effects 

Uva ursi is considered relatively safe for adults taking low doses by mouth for a short period of time. Potential side effects you may experience from short-term use are:

  • Nausea
  • Vomiting
  • Upset stomach
  • Greenish-brown urine
  • Insomnia
  • Irritability

However, you shouldn't take high doses of uva ursi or use it for a long period of time. Prolonged use may lead to serious, life-threatening complications, like:

  • Liver damage
  • Kidney damage
  • Breathing difficulties
  • Eye problems
  • Seizures
  • Death 

Additionally, pay attention to signs of toxicity, such as:

  • Tinnitus (ringing in the ears)
  • Nausea and vomiting
  • Feeling like you're suffocating
  • Shortness of breath
  • Convulsions
  • Delirium (confusion and lack of awareness)
  • Collapse

Certain people shouldn't take uva ursi. Don't use uva ursi if you:

  • Are pregnant or breastfeeding (uva ursi could induce labor, isn't safe for children, and safety for nursing babies hasn't been established)
  • Have any kidney disorders (uva ursi can worsen kidney problems)
  • Have high blood pressure
  • Have Crohn’s disease, ulcers, or digestive problems
  • Have liver disease
  • Have thinning of the retina, the back of the eye
  • Take lithium
  • Take nonsteroidal anti-inflammatory drugs (NSAIDs) or corticosteroids
  • Take iron supplements

Talk to your doctor first before taking uva ursi. Your doctor can help you determine if it's safe for you to take, or if you should steer clear.

Uva ursi tea
Verywell / Anastasia Tretiak

Dosage and Preparation

Uva ursi is sold in crushed leaf and powder preparations, including tea, tinctures, and capsules to take by mouth. Extracts of the plant are also used products applied to the skin. Only the leaves are used—not the berries—in herbal medicinal preparations.

Due to the potential for toxicity, ask your doctor before taking uva ursi. Experts don't recommend taking the herb for more than two weeks. Some guidelines suggest taking uva ursi less than five times a year, and for not more than five days each time.

Never take more than the recommended dose or take uva ursi for longer than the prescribed duration.

As a dried herb, a standard dose is 2 grams to 4 grams per day with a total of 400 milligrams (mg) to 800 mg of arbutin.

To make a tea, soak 3 grams of dried leaves in 5 ounces of water for 12 hours. Then strain the tea and drink it three to four times each day. 

Avoid taking too much uva ursi. Even 15 grams (about a half-ounce) of dried uva ursi leaves can be toxic for some people.

Summary

Uva ursi is an herbal supplement that may be used to treat urinary tract infections and urinary incontinence, and to lighten the skin. There is limited research to support these uses, though.

Uva ursi can potentially have dangerous side effects, and it should be taken only for a short time. Always consult with your doctor before taking it. Pregnant or breastfeeding women and children should not use uva ursi.

Frequently Asked Questions

  • Can children take uva ursi?

    No, it's not safe to give uva ursi to children.

  • Is uva ursi safe for pregnant or breastfeeding moms?

    No, research hasn't established the safety for nursing babies and pregnant mothers.

  • How can I avoid an upset stomach when taking uva ursi?

    Try taking uva ursi with meals to reduce uncomfortable side effects.

  • How can I ensure the optimal effects of uva ursi?

    Some herbal specialists suggest taking uva ursi with calcium citrate to alkalinize the urine, or make it less acidic. However, always consult with your doctor before taking uva ursi or calcium citrate.

  • What other herbs are commonly taken with uva ursi?

    There are several herbal combinations for bladder infections. Some preliminary studies show that taking uva ursi with dandelion tea may help prevent UTIs. Still, there's not enough clinical research to support these claims.

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7 Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. Radulović N, Blagojević P, Palić R. Comparative study of the leaf volatiles of Arctostaphylos uva-ursi (L.) Spreng. and Vaccinium vitis-idaea L. (Ericaceae)Molecules. 2010;15(9):6168–6185. doi:10.3390/molecules15096168

  2. Trill J, Simpson C, Webley F, et al. Uva-ursi extract and ibuprofen as alternative treatments of adult female urinary tract infection (ATAFUTI): study protocol for a randomised controlled trial. Trials. 2017;18(1):421. doi:10.1186/s13063-017-2145-7

  3. National Toxicology Program. Chemical information review document for arbutin and extracts from Arctostaphylos uva-ursi. January 2006.

  4. Deutch CE. Limited effectiveness of over-the-counter plant preparations used for the treatment of urinary tract infections as inhibitors of the urease activity from Staphylococcus saprophyticus. J Appl Microbiol. 2017;122(5):1380-1388. doi:10.1111/jam.13430

  5. Head KA. Natural approaches to prevention and treatment of infections of the lower urinary tract. Altern Med Rev. 2008;13(3):227-44. PMID:18950249

  6. Mount Sinai. Uva ursi.

  7. Bone K, Mills S. Principles and Practice of Phytotherapy: Modern Herbal Medicine, 2nd edition. Churchill Livingstone; 2013. doi:10.1016/B978-0-443-06992-5.00069-4

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