Index of Herbs

Concern guide

Herbs for Urinary Tract Health

Cranberry for repeat UTIs, plus herbs for urine flow and prostate symptoms, with what the research shows and when to see a doctor.

5 herbs reviewed

Updated October 8, 2026

Urinary tract infections (UTIs) are among the most common infections there are, especially in women. A bladder infection usually brings burning when you pass urine, a frequent and urgent need to go, and sometimes cloudy or strong-smelling urine, and some women get one infection after another. In men, urinary symptoms such as a weak stream, dribbling, or getting up at night to pass urine are more often linked to an enlarged prostate (benign prostatic hyperplasia, or BPH), which becomes common with age, though infection, bladder problems, and other conditions can cause the same symptoms.

Herbs have a modest, specific place here. Cranberry is the best studied, and its role is prevention: in people prone to repeat infections, juice or capsules taken daily reduced the number of new UTIs in many trials, but cranberry does not treat an infection that has already started, which usually needs a urine test and often antibiotics. Nettle, dandelion, and burdock are traditional European “flushing” herbs, taken with plenty of fluid to increase urine in minor urinary complaints. Saw palmetto and nettle root are used for prostate symptoms, but only after a doctor has ruled out serious causes. Any urinary symptoms in men, in pregnancy, or in children, and any blood in the urine, need a doctor first.

The list is ordered by strength of evidence for urinary health, then by how commonly each herb is used. Cranberry leads, followed by saw palmetto, whose trials disagree, and three herbs whose standing rests on long traditional use rather than clinical trials. Each rating applies to the specific use described, whether preventing repeat infections, easing prostate symptoms, or increasing urine flow, and every entry links to its full monograph.

02 The shortlist

The herbs, from best studied to time-honored

How to read the ratings

  • Good clinical evidence
  • Promising clinical evidence
  • Early or mixed evidence
  • Long traditional use

Ratings show how much research backs each herb for this particular concern. Every herb links to its full monograph, with preparations, safety notes, and sources.

  1. 01 Cranberry

    Promising clinical evidence

    Vaccinium macrocarpon

    A 2023 Cochrane review of 50 trials found, with moderate certainty, that cranberry juice or capsules reduced repeat symptomatic UTIs by about a quarter in women with recurrent infections and by about half in children and in people at risk after medical procedures. It showed little or no benefit in older people in care homes, in pregnancy, or with bladder-emptying problems, and the FDA calls the evidence limited. Cranberry is for prevention only, not for treating an active infection; people taking warfarin or who form kidney stones should check with a doctor first.

    Read the cranberry monograph →

  2. 02 Saw Palmetto

    Early or mixed evidence

    Serenoa repens

    Saw palmetto berry extract is the herb most men try for the urinary symptoms of an enlarged prostate, such as a weak stream and getting up at night. EMA accepts one hexane extract at 320 mg a day as a well-established medicine, based mostly on older trials, but the large STEP and CAMUS trials found it no better than placebo, and a 2023 Cochrane review of 27 trials concluded with high certainty that it gives little to no benefit. It does not change PSA results, and rare bleeding reports mean care with blood thinners and before surgery.

    Read the saw palmetto monograph →

  3. 03 Stinging Nettle

    Long traditional use

    Urtica dioica

    Stinging nettle is two remedies in one plant. EMA accepts the leaf and herb as a traditional tea to increase urine in minor urinary complaints, taken with plenty of fluid, and the root as a traditional remedy for enlarged-prostate symptoms once a doctor has ruled out serious causes. In 2025 EMA judged none of eight placebo-controlled root trials adequate to prove benefit. It is generally well tolerated, but the herb is not recommended in pregnancy or for anyone whose doctor has restricted their fluids.

    Read the stinging nettle monograph →

  4. 04 Dandelion

    Long traditional use

    Taraxacum officinale

    Dandelion leaf and root are classic European bitters, and EMA lists them as traditional remedies to increase urine and help flush the urinary tract in minor urinary complaints, alongside their digestive uses. That status rests on long use rather than clinical trials, and human data on urine output come from one small pilot study. Avoid it with daisy-family allergy or bile-duct and gallbladder problems, and check with a prescriber if you take diuretics, lithium, or diabetes medicines.

    Read the dandelion monograph →

  5. 05 Burdock

    Long traditional use

    Arctium lappa

    Burdock root, eaten as gobo in Japan, is accepted by EMA as a traditional remedy to increase urine and flush the urinary tract in minor urinary complaints, based on long use rather than trials. Non-tea forms need extra fluid, and EMA advises against combining it with prescription diuretics. It is for adults only, is not recommended in pregnancy, and should be avoided with daisy-family allergy; teas sold as burdock have caused atropine-like poisoning when contaminated with other plants.

    Read the burdock monograph →

03 Caution

Using these herbs safely

Urinary symptoms are common and often minor, but some need prompt care rather than herbs. Contact a doctor for any symptoms of a UTI, because an active infection usually needs a urine test and often antibiotics, and contact one right away for signs of a possible kidney infection: back or side pain, chills, fever, or vomiting. Blood in the urine, symptoms that come back soon after antibiotics, and any urinary symptoms in pregnancy, in men, or in children also need a medical assessment. Being unable to pass urine is an emergency. Cranberry is for preventing repeat infections, and none of these herbs should be used to put off treatment for an infection that has already started.

A few combinations are worth checking with a pharmacist. Cranberry has been linked to bleeding in people taking warfarin, including a death, so UK regulators advised avoiding cranberry products with warfarin; controlled studies mostly found no consistent effect, but anyone on warfarin should keep intake steady and tell their anticoagulation clinic, and EMA also advises avoiding cranberry with the anti-rejection drug tacrolimus. Saw palmetto has case reports of serious bleeding during surgery and a warfarin warning in its EU monograph, so it needs care with blood thinners and should be mentioned before any operation. Nettle, dandelion, and burdock increase urine, so EMA advises against combining burdock with prescription diuretics, and people taking diuretics, lithium, diabetes medicines, or blood pressure medicines should ask before using any of them.

Some people should avoid particular herbs. Cranberry can raise urinary oxalate, so people who have had kidney stones should be cautious. Flushing herbs are unsuitable for anyone whose doctor has restricted their fluids, including many people with heart failure or kidney disease. Dandelion and burdock belong to the daisy family, so people allergic to ragweed or chrysanthemums should avoid them, and dandelion should not be used with bile-duct obstruction or complicated gallbladder disease. Pregnancy and breastfeeding: EMA does not recommend cranberry medicines, nettle herb, or medicinal burdock, and NCCIH says saw palmetto may be unsafe. Children: EMA does not recommend cranberry medicines under 18, saw palmetto should never be given to children because girls given it have had hot flashes and early periods, and a child with a UTI needs a pediatric assessment.

Product choice matters too. A glass of cranberry juice cocktail contains close to 30 grams of sugar, and capsules list cranberry powder, extract, or PACs in ways that are not directly comparable. A capsule labeled simply “nettle” may contain either the leaf or the root, which are used for different things. Saw palmetto extracts vary widely, and EMA has documented products padded with olive oil. Combination prostate and “bladder cleanse” blends make it hard to know what you are taking or which ingredient caused a problem, so single-herb products with a stated plant part and dose are easier to use safely.

04 Questions

Frequently Asked Questions

Cranberry has the strongest evidence. A 2023 Cochrane review of 50 trials found that cranberry juice or capsules cut repeat symptomatic UTIs by about a quarter in women with recurrent infections and by about half in children and in people at risk after medical procedures. It did not clearly help older people in care homes or pregnant women, and the FDA describes the evidence as limited. If you get frequent UTIs, a doctor can also discuss other prevention options.

No. NCCIH says cranberry is not recommended as a treatment for an existing UTI, and its proposed action, stopping bacteria from sticking to the bladder wall, fits prevention rather than cure. Burning, frequency, or urgency usually need a urine test and often antibiotics, and back or side pain, chills, fever, or vomiting can mean a kidney infection that needs care right away.

Not reliably. Saw palmetto is the most popular choice, but two large NIH-funded trials found it no better than placebo, and a 2023 Cochrane review concluded with high certainty that it gives little to no benefit for urinary symptoms. EMA accepts nettle root only as a traditional remedy, after finding none of eight placebo-controlled trials adequate. Urinary symptoms in men can come from prostate cancer, infection, or bladder problems, so see a doctor first; prescription treatments for BPH have much stronger evidence.

It is the traditional idea behind herbs such as nettle leaf, dandelion, and burdock, which EMA accepts as traditional remedies to increase urine in minor urinary complaints, taken with plenty of fluid. This rests on long use rather than clinical trials. Flushing herbs are not a treatment for infection, are unsuitable for anyone told to restrict fluids, and should not be combined with prescription diuretics without a doctor’s advice.

Both need care. After reports of bleeding in people taking warfarin, including a death, UK regulators advised avoiding cranberry products with warfarin; most controlled studies found no consistent change in INR, but talk to your anticoagulation clinic before starting or stopping it. Cranberry can also raise urinary oxalate, so people who have had kidney stones should ask their doctor before taking it every day, especially as concentrated tablets.

See a doctor for any symptoms of a UTI, and right away for back or side pain, chills, fever, or vomiting, which can signal a kidney infection. Blood in the urine, symptoms that come back soon after antibiotics, and urinary symptoms in pregnancy, in men, or in children also need an assessment, and being unable to pass urine is an emergency. Herbs such as cranberry are for prevention once a doctor has dealt with the immediate problem.

05 References

Sources

These references support the claims in this guide. Each herb’s monograph carries its own full source list.

  1. Cranberries for preventing urinary tract infections

    Cochrane Database of Systematic Reviews (PubMed 37947276), 2023

    Supports the some rating for cranberry: 50 trials; moderate-certainty reduction in repeat UTIs in women with recurrent UTIs (risk ratio 0.74), children (0.46), and after medical interventions (0.47), but no clear benefit in institutionalized older people or pregnancy.

  2. Cranberry

    National Center for Complementary and Integrative Health (NIH), 2024

    States that cranberry may lower the risk of recurrent UTIs in women, is not a treatment for existing UTIs, and has conflicting evidence on warfarin.

  3. FDA Announces Qualified Health Claim for Certain Cranberry Products and Urinary Tract Infections

    U.S. Food and Drug Administration, 2020

    Allows qualified claims describing limited and inconsistent evidence for cranberry juice beverages and limited evidence for supplements in reducing recurrent UTI in healthy women.

  4. European Union herbal monograph on Vaccinium macrocarpon Aiton, fructus

    European Medicines Agency (EMA/HMPC/49135/2017), 2023

    Traditional use in women for recurrent lower UTIs; not recommended in men, pregnancy, or under 18; oxalate warning; warfarin and tacrolimus contraindicated.

  5. Serenoa repens for the treatment of lower urinary tract symptoms due to benign prostatic enlargement

    Cochrane Database of Systematic Reviews (PubMed 37345871), 2023

    Supports the mixed rating for saw palmetto: 27 trials with 4,656 men found, with high certainty, little to no difference in urinary symptoms or quality of life versus placebo.

  6. Saw palmetto

    National Center for Complementary and Integrative Health (NIH), 2025

    Says saw palmetto is probably not helpful for BPH symptoms, does not affect PSA, and may be unsafe in pregnancy or breastfeeding.

  7. European Union herbal monograph on Urtica dioica L.; Urtica urens L., herba (Revision 1)

    European Medicines Agency (EMA/HMPC/261302/2022), 2025

    Traditional use of nettle herb to increase urine in minor urinary complaints with adequate fluid; not recommended in pregnancy, breastfeeding, or where fluid intake is restricted.

  8. European Union herbal monograph on Urtica dioica L.; Urtica urens L., radix (Revision 1)

    European Medicines Agency (EMA/HMPC/322646/2023), 2025

    Traditional use of nettle root for lower urinary tract symptoms of BPH after a doctor has excluded serious conditions.

  9. Taraxaci radix cum herba (dandelion root with herb)

    European Medicines Agency, 2009

    Traditional use of dandelion to increase urine as an adjuvant in minor urinary complaints, with daisy-family and biliary contraindications.

  10. Community herbal monograph on Arctium lappa L., radix

    European Medicines Agency (EMA/HMPC/246763/2009 Corr.1), 2010

    Traditional use of burdock root to increase urine in minor urinary complaints in adults; diuretic caution; not recommended in pregnancy.

  11. Urinary tract infection - adults

    MedlinePlus Medical Encyclopedia, National Library of Medicine (NIH), 2024

    Source for contacting a provider about UTI symptoms, and right away for signs of kidney infection such as back or side pain, chills, fever, or vomiting.

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