Best Tea for Kidney Stones: 3 Options

Green tea, chamomile tea and rooibos tea are reasonable options for people concerned about kidney stones, but none is proven to prevent or dissolve a stone.

Tea can contribute to fluid intake, which matters for stone prevention. Plain water remains a reliable choice; see the best drinks for kidney stones for a broader comparison.

A common urology guideline recommends that people who form kidney stones drink enough fluid to produce at least 2.5 liters of urine per day, or about 10½ US cups. That is a urine-output goal, not a prescription to drink that amount of tea. Use the water intake tool as a starting estimate and confirm your personal fluid goal with your clinician.

Do not force extra fluid if you have been told to restrict it, or if you have symptoms of a possible obstructing stone. A clinician can help you decide how much to drink and whether you need treatment.

What are the 3 best teas for kidney stones?

These are practical options, not a proven ranking. Green tea has limited human research related to kidney stones; the two herbal teas are included as ways to drink fluid, not because they have been shown to protect against stones. Herbal does not automatically mean low in oxalate or safe for everyone.

1. Green tea

How it may help: Green tea supplies water, which can help increase urine volume. More dilute urine makes it less likely that stone-forming substances will concentrate enough to form crystals. Green tea can also contain oxalate, however, and the amount varies with the product and preparation.

Evidence: A 2022 case-control study of tea intake and hospitalized kidney stones found an association between reported green tea intake and a lower likelihood of hospitalization for kidney stones. Participants reported their own tea habits and were not randomly assigned to drink green tea, so the study cannot show that green tea caused the difference.

A separate genetic analysis of tea intake and kidney stone risk also suggested an association, but it did not establish a protective dose or prove that a particular brewed tea prevents stones. Neither study shows that green tea treats an existing stone.

How to brew:

• 1 green tea bag
• 1 cup (240 mL) water

1. Heat the water until hot, without keeping it at a vigorous boil.
2. Steep the green tea bag for 2–3 minutes, then remove it.
3. Let the tea cool enough to drink and serve it plain.

Cautions: Green tea usually contains caffeine. If you form calcium oxalate stones or have been advised to limit oxalate, ask your clinician or dietitian how it fits into your diet; do not assume that green tea is oxalate-free.

2. Chamomile tea

How it may help: Chamomile tea provides fluid. There is no established stone-specific mechanism showing that chamomile tea prevents kidney stones, changes urine chemistry in a useful way or helps a stone pass.

Evidence: We found no clinical evidence that chamomile tea prevents or treats kidney stones. It is an option for someone who wants a different way to drink fluid, not a substitute for a prevention plan based on their stone type.

How to brew:

• 1 chamomile tea bag
• 1 cup (240 mL) water

1. Heat the water to a boil.
2. Steep the chamomile tea bag in the water for 5 minutes, then remove it.
3. Let the tea cool enough to drink and serve it plain.

Cautions: Avoid chamomile if you have had an allergic reaction to it; people with allergies to plants such as ragweed should be cautious. Ask a clinician or pharmacist before using it regularly if you take warfarin or other medicines, or if you are pregnant or breastfeeding. Its oxalate content should not be assumed to be negligible.

3. Rooibos tea

How it may help: Rooibos tea contributes water to your daily intake and is naturally caffeine-free. Its role here is hydration; there is no established evidence that rooibos tea dissolves stones or changes stone risk independently of fluid intake.

Evidence: We found no clinical evidence establishing rooibos tea as a kidney stone prevention or treatment. There is also not enough evidence to rank it above chamomile tea or water for this purpose.

How to brew:

• 1 rooibos tea bag
• 1 cup (240 mL) water

1. Heat the water to a boil.
2. Steep the rooibos tea bag in the water for 5 minutes, then remove it.
3. Let the tea cool enough to drink and serve it plain.

Cautions: Caffeine-free does not mean oxalate-free. Products vary, so ask your clinician or dietitian about rooibos tea if you have been given an oxalate restriction. Check the label for added ingredients, especially in blends marketed for a particular health benefit.

Which teas should you limit or avoid?

Strong black tea and large amounts of black tea: Black tea can contribute oxalate, although the amount varies. This is particularly relevant if you form calcium oxalate stones or have high urine oxalate. It does not mean everyone with kidney stones must avoid black tea; discuss your usual intake with your clinician or dietitian.

Concentrated or powdered teas: Products made with concentrated tea or whole tea leaves are not necessarily equivalent to a strained tea bag infusion. Their ingredients and preparation differ, so do not assume they are low in oxalate or more effective for kidney stones.

“Kidney cleanse,” detox and diuretic blends: Avoid relying on products that promise to flush out or dissolve stones. Their ingredients can vary, and they have not been shown to replace medical assessment or stone treatment. Some ingredients may interact with medicines or be unsuitable for people with kidney disease.

Heavily sweetened tea: Choose unsweetened tea when practical. Adding sugar does not improve tea's ability to prevent a stone. If a product has several added ingredients, its label is a better guide to what you are drinking than the word “tea” alone.

Who should be careful, and when should you see a doctor?

Seek urgent medical care for possible kidney stone symptoms with fever or chills, severe or uncontrolled pain, vomiting that prevents you from keeping fluids down, or very little or no urine. These can signal a complication that needs prompt assessment. If you have a solitary kidney or are pregnant and have symptoms suggesting a stone, seek prompt medical advice rather than trying to manage it with tea.

Contact a clinician promptly if you notice blood in your urine, even if you think a stone is the cause. A clinician can determine whether testing is needed; tea should not delay evaluation.

Ask for an individualized fluid goal if you have chronic kidney disease, heart failure or another reason to limit fluids. Pregnancy, breastfeeding, children, allergies and medicines also warrant extra care with herbal products. Do not stop prescribed medicine to drink tea.

If you have had kidney stones before, ask whether the stone can be analyzed and whether urine testing is appropriate. Prevention differs by stone type: advice for a calcium oxalate stone may not be the right advice for a uric acid stone. A review of nutrition and kidney stone disease emphasizes fluid intake and individualized dietary assessment, rather than a single tea as a remedy.