Chanca Piedra for Kidney Stones: What Studies Show, and What Actually Prevents Stones

Chanca piedra, Spanish for “stone breaker,” is the common name for Phyllanthus niruri, a small tropical plant used for generations in South American and other traditional medicine systems to treat kidney stones and gallstones. Supplements and teas made from the plant are widely sold online, often with claims that they dissolve stones and help people avoid surgery. Kidney stones are common and painful, so a natural remedy that prevented them would be appealing.

Research on chanca piedra is more limited than marketing suggests. Laboratory and animal studies have shown effects on crystal formation, and small human studies have reported changes in urine chemistry, but there is no good evidence that it dissolves existing stones or prevents surgery. This article reviews the research, explains what is proven to prevent kidney stones, and discusses safety considerations.

What Is Chanca Piedra?

Phyllanthus niruri is a small herb that grows in tropical regions of the Americas, Asia, and Africa. Traditional uses include treating kidney and bladder stones, gallstones, liver problems, and infections. The plant contains a variety of compounds, including lignans, flavonoids, alkaloids, and tannins. Laboratory studies have suggested that extracts can interfere with the growth and aggregation of calcium oxalate crystals, the most common component of kidney stones, and may relax smooth muscle in the urinary tract, which could theoretically help stones pass. Products sold in the United States are dietary supplements, which are not approved by the FDA for treating disease, and their content and quality can vary.

A 2010 review in the International Brazilian Journal of Urology by M. A. Boim and colleagues summarized laboratory, animal, and early clinical studies and concluded that they suggested a preventive effect on stone formation or elimination, but that longer-term randomized clinical trials were needed to confirm therapeutic benefits.

What Do Clinical Trials Show?

A 2004 randomized, placebo-controlled trial in Urological Research by J. L. Nishiura and colleagues at the Federal University of São Paulo enrolled 69 patients with calcium kidney stones, who took 450 milligram capsules of Phyllanthus niruri three times daily or placebo for three months. Overall, urine chemistry did not differ significantly after treatment, except for a slight reduction in urinary magnesium. In a subgroup of patients with high urinary calcium, chanca piedra significantly reduced urinary calcium from 4.8 to 3.4 milligrams per kilogram per day. There was no significant difference in stone passage or pain relief between groups. The authors called for larger trials.

A 2018 study in the International Brazilian Journal of Urology by N. D. Pucci and colleagues gave Phyllanthus niruri as an infusion (tea) to 56 patients with kidney stones smaller than 10 millimeters for 12 weeks, followed by a 12-week washout, and measured blood, urine, and ultrasound parameters. The herb caused no significant adverse effects on blood measures, increased urinary magnesium and potassium excretion, and decreased urinary oxalate and uric acid in patients who had high levels of these substances. However, the study had no placebo group, limiting conclusions about effectiveness.

What Is Proven to Prevent Kidney Stones?

According to a 2012 analysis in European Urology by Charles Scales Jr. and colleagues using national survey data, kidney stones affect about 1 in 11 people in the United States, a marked increase from earlier decades, with diet and lifestyle likely playing important roles. Most stones contain calcium oxalate, and up to half of people who form a stone develop another within about ten years without prevention.

Drinking more fluid. A five-year randomized trial in the Journal of Urology by Loris Borghi and colleagues found that people with calcium stones produced less urine than healthy controls and that increasing water intake to produce at least two liters of urine daily reduced recurrence; the authors concluded that a large water intake is the initial therapy for preventing recurrences. Recurrence in the high-water group was about half that in the control group.

Citrate. A 2015 Cochrane review by R. Phillips and colleagues found that citrate salts, such as potassium citrate, prevent new stone formation and reduce stone growth in people with calcium oxalate stones, though study quality was moderate to poor.

Diet. Research from large U.S. cohorts by Eric Taylor and colleagues found that a DASH-style diet, rich in fruits, vegetables, and low-fat dairy and lower in sodium and red meat, was associated with higher urine volume and citrate, which may reduce stone risk. Other dietary measures depend on stone type and urine chemistry: normal dietary calcium (rather than restriction), less sodium, moderate animal protein, and, for some people, limiting high-oxalate foods.

How Much Difference Does Water Make?

In the Borghi trial, 199 people who had formed their first calcium stone were randomly assigned either to increase water intake to produce at least two liters of urine daily or to receive no specific instructions. Over five years, stones recurred in 12 of 99 people in the high-water group (about 12 percent) compared with 27 of 100 in the control group (27 percent), and the time to recurrence was longer with high water intake. This simple, inexpensive measure has stronger evidence than any herbal remedy for preventing stones. Practical targets for many stone formers are about 2.5 to 3 liters of fluid per day, adjusted for climate and activity, with pale yellow urine as a useful guide.

Why Are Herbal Stone Remedies Popular?

Kidney stones are intensely painful and often recur, and procedures to remove them can be uncomfortable and costly. These factors make natural remedies appealing, especially those with long traditional use and evocative names like “stone breaker.” Online testimonials often describe passing stones after drinking chanca piedra tea, but many small stones pass on their own within weeks regardless of treatment, which makes anecdotes unreliable. Controlled trials are needed to distinguish treatment effects from natural stone passage, and the few available trials have not shown that chanca piedra speeds passage or dissolves stones.

Is Chanca Piedra Safe?

Chanca piedra appeared well tolerated in the short-term studies described above. However, because it is sold as a supplement, product quality and dose vary. Laboratory and animal studies suggest it may lower blood sugar and blood pressure, so people taking diabetes or blood pressure medications should consult a clinician. It may also interact with medications such as lithium or blood thinners, and safety in pregnancy and breastfeeding has not been established. Anyone with kidney disease should discuss supplements with a nephrologist.

When Should You Seek Medical Care?

Kidney stones can cause severe pain and complications. Seek immediate care for severe pain, fever or chills, nausea and vomiting preventing fluid intake, blood in the urine with pain, or inability to urinate, since an infected or obstructing stone can be an emergency. Stones smaller than about 5 millimeters often pass on their own, and medications called alpha-blockers can help some stones pass. Larger stones may require procedures such as shock wave lithotripsy, ureteroscopy, or percutaneous nephrolithotomy. After a stone, a urologist or nephrologist can analyze the stone and urine chemistry to guide prevention.

How Do Kidney Stones Form?

Kidney stones form when substances in urine, such as calcium, oxalate, uric acid, or phosphate, become concentrated enough to crystallize, and the crystals grow and stick together. Low urine volume, high urinary calcium or oxalate, low urinary citrate (a natural inhibitor of crystallization), and urine pH all affect risk. Diet, genetics, obesity, diabetes, certain bowel conditions, some medications, and hot climates that cause dehydration contribute. Understanding which factors are present in an individual, through stone analysis and 24-hour urine testing, allows prevention to be targeted, which is why medical evaluation after a first or recurrent stone is valuable.

Dietary Calcium: Don’t Cut It

A common misconception is that people with calcium stones should avoid calcium. Research has shown that normal dietary calcium intake is associated with lower stone risk, because calcium in the gut binds oxalate from food, preventing its absorption and reducing urinary oxalate. Restricting calcium can increase oxalate absorption and stone risk and may harm bone health. Calcium supplements, however, may slightly increase risk if taken without food, so stone formers who need supplements are often advised to take them with meals. These nuances illustrate why individualized advice matters.

Sodium, Protein, and Sugar

High sodium intake increases urinary calcium, raising stone risk, so reducing salt is a common recommendation. High intake of animal protein increases urinary calcium and uric acid and lowers urinary citrate. Sugar-sweetened beverages, particularly those high in fructose, have been associated with higher stone risk in large cohort studies. Citrus fruits and juices, by contrast, provide citrate. A diet rich in fruits and vegetables, moderate in animal protein, and low in sodium and added sugars aligns with both stone prevention and general health.

Other Herbal and Home Remedies

Many herbal and home remedies are promoted for kidney stones, including lemon juice, apple cider vinegar, celery juice, dandelion root, and various teas. Lemon juice has some rationale because it increases urinary citrate, and some clinicians recommend lemonade therapy, though evidence is mixed and less robust than for prescription citrate. Most other remedies lack clinical evidence. Some herbal products may be contaminated or interact with medications. Patients interested in complementary approaches should discuss them with their clinicians and not delay evaluation of severe symptoms. Herbal formulas are promoted for dental problems as well, such as a Tibetan blend claimed to prevent root canals.

Medical Treatments for Stone Prevention

When lifestyle measures are not enough, medications tailored to urine chemistry can reduce recurrence. Thiazide diuretics lower urinary calcium in people with hypercalciuria. Potassium citrate raises urinary citrate and pH, helping prevent calcium and uric acid stones. Allopurinol lowers uric acid production in people with high urinary uric acid. For rare stone types, specialized medications are available. These treatments have stronger clinical trial support than herbal remedies and are typically guided by 24-hour urine testing and stone analysis. Patients with frequent stones benefit from follow-up with a kidney specialist or urologist experienced in stone prevention.

Key Facts at a Glance

Kidney stones affect about 1 in 11 Americans. In a randomized trial of 69 calcium stone formers, chanca piedra reduced urinary calcium only in the subgroup with high urinary calcium and did not improve stone passage or pain compared with placebo. A 12-week uncontrolled study found it safe and associated with lower urinary oxalate and uric acid in patients with high levels. High water intake halved five-year recurrence (12 percent versus 27 percent) in a randomized trial, and citrate salts prevent new stones in people with calcium oxalate stones. Chanca piedra should not replace medical evaluation.

Common Myths

“Chanca piedra dissolves stones.” No clinical trial has shown that it dissolves existing stones.

“Avoid calcium if you have calcium stones.” Normal dietary calcium lowers risk by binding oxalate in the gut.

“Passing a stone after a remedy proves it worked.” Many small stones pass on their own.

“Natural means safe.” Herbal products can vary in quality and interact with medications.

Children and Kidney Stones

Kidney stones in children have become more common in recent decades, a trend linked to diet, obesity, and lower fluid intake. Children with stones should be evaluated by a pediatric specialist, since underlying metabolic or genetic conditions are more likely than in adults. Prevention focuses on adequate fluids, reduced sodium, and balanced diets. Herbal remedies like chanca piedra have not been studied in children and should not be given without medical advice.

Questions to Ask Your Doctor

What type of stone did I have, and can it be analyzed? Should I have a 24-hour urine test to identify risk factors? How much fluid should I drink each day? Which dietary changes matter most for my stone type? Would medication such as potassium citrate or a thiazide help me? Are there supplements I should avoid? Is it safe to try chanca piedra alongside my current medications? Asking these questions helps build a prevention plan based on evidence and individual needs.

Key Terms

Phyllanthus niruri: The scientific name for chanca piedra.

Hypercalciuria: High levels of calcium in the urine, a common stone risk factor.

Citrate: A natural urinary inhibitor of calcium stone formation.

24-hour urine test: A collection of all urine over a day to measure stone risk factors.

Lithotripsy: A procedure using shock waves to break stones into smaller pieces.

The Bottom Line

Chanca piedra has a long history of traditional use for kidney stones, and laboratory studies suggest it can affect crystal formation. Small human studies found it was well tolerated and changed some urine measures in subgroups of patients, but a randomized trial found no improvement in stone passage or pain compared with placebo, and no study has shown that it dissolves stones or prevents surgery. Proven prevention starts with drinking enough fluid to produce at least two liters of urine a day, which halved recurrence in a randomized trial, along with diet changes and, when needed, medications tailored to stone type. Anyone with severe pain, fever, or difficulty urinating needs prompt medical care.

Further Reading

Peer-reviewed studies cited here describe the clinical trials of Phyllanthus niruri and the evidence for fluids, citrate, and diet in stone prevention. Urology and nephrology professional societies publish patient guides on kidney stone prevention. People considering supplements can consult reputable sources on herbal products and discuss them with their clinicians.

Traditional Use and Modern Research

Traditional remedies like chanca piedra often have long histories of use, and some have led to valuable discoveries. Laboratory research on Phyllanthus niruri has identified compounds with biological activity, and Brazilian researchers have conducted much of the clinical work. However, traditional use does not establish effectiveness or safety for specific conditions, and modern trials are needed to test claims. The research on chanca piedra illustrates both the promise of studying traditional remedies and the importance of controlled trials before recommending them. Larger, longer trials measuring stone recurrence would clarify whether it has a role in prevention.

Stones and Overall Health

Kidney stones are associated with other health conditions, including obesity, diabetes, high blood pressure, and chronic kidney disease. People who form stones may benefit from attention to these conditions, and lifestyle changes that prevent stones, such as healthier diets, adequate hydration, and weight management, also support overall health. Recognizing stones as part of a broader metabolic picture helps patients and clinicians take a comprehensive approach.

A Balanced View

Chanca piedra is a plant with traditional use and some intriguing laboratory and early clinical findings, but current evidence does not support claims that it dissolves stones or prevents surgery. For people interested in trying it, the main risks are relying on it instead of proven prevention, product quality concerns, and possible drug interactions. Discussing it with a clinician, using it alongside rather than instead of fluids and other proven measures, and continuing medical follow-up allow people to explore traditional remedies while protecting their health.

Daily Habits for Stone Prevention

Carry a water bottle and drink throughout the day, increasing intake in hot weather or during exercise. Add lemon or lime to water if you enjoy it. Limit salty processed foods, fast food, and canned soups. Include calcium-rich foods with meals. Moderate meat portions. Limit sugary drinks. Maintain a healthy weight. These habits are simple, inexpensive, and supported by research, and they benefit overall health as well as kidney stone risk.

Cost Considerations

Chanca piedra supplements and teas are relatively inexpensive, but costs add up over time, and there is no proven benefit to justify ongoing use for most people. Water, dietary changes, and generic prescription medications like potassium citrate or thiazides, when indicated, are cost-effective prevention strategies with evidence behind them. Kidney stone procedures and emergency visits are expensive, so investing in proven prevention is both healthier and more economical. Patients should check with insurers about coverage for 24-hour urine testing and prescribed medications.

When Stones Need Procedures

Stones larger than about 6 to 10 millimeters, stones causing persistent obstruction or infection, and stones that do not pass after several weeks often require procedures. Shock wave lithotripsy uses focused sound waves to fragment stones. Ureteroscopy passes a thin scope through the urinary tract to break up or remove stones with lasers. Percutaneous nephrolithotomy removes large kidney stones through a small incision in the back. The choice depends on stone size, location, composition, and patient factors. No herbal remedy has been shown to make these procedures unnecessary for stones that require them.

Questions Readers Often Ask

How long should I try chanca piedra to see if it works? There is no established duration, and studies used three months; it should not replace evaluation of symptoms. Can I take it with potassium citrate? Discuss combinations with your clinician. Does chanca piedra help gallstones? There is no good evidence for gallstones either. Is chanca piedra tea better than capsules? Studies used both forms; quality and dose vary widely among products.

Will drinking more water alone prevent all stones? Not always, but it is the most important first step and halved recurrence in a long-term trial.

Diet Patterns That Help

The DASH diet, originally designed to lower blood pressure, emphasizes fruits, vegetables, whole grains, low-fat dairy, nuts, and legumes while limiting sodium, red meat, and sugary drinks. Research from large cohorts associated DASH-style eating with higher urinary volume and citrate and lower stone risk. A Mediterranean-style diet shares many features. Both patterns support heart health and weight management, making them practical choices for people with kidney stones who also want to reduce cardiovascular risk.

A registered dietitian can help adapt these patterns to an individual’s stone type and preferences.

Kidney Stones and Hydration in Hot Climates

Stone risk rises in hot climates and summer months because sweating reduces urine volume. Regions with hot weather have higher stone rates, and researchers have projected that rising temperatures could increase stone prevalence. People who work outdoors, exercise heavily, or live in hot areas should increase fluid intake to compensate for sweat losses. Monitoring urine color, aiming for pale yellow, is a practical guide. This is another reason water remains the cornerstone of prevention, regardless of whether people choose to try herbal remedies.

Practical Takeaways

Drink enough fluid to produce at least two liters of urine daily. Keep dietary calcium normal and eat it with meals. Reduce sodium and sugary drinks. Moderate animal protein. After a stone, ask for stone analysis and urine testing to guide prevention. Consider medications if recommended. If you want to try chanca piedra, discuss it with your clinician, use a reputable product, and continue proven measures. Seek immediate care for severe pain, fever, vomiting, or inability to urinate.

Key Lessons in Brief

Traditional remedies deserve study but are not proven by tradition alone. Small trials of chanca piedra showed urine chemistry changes in subgroups but not clinical benefits on stone passage. Water intake has the strongest evidence for prevention. Diet and medications should be tailored to stone type through testing. And severe symptoms require medical care, not home remedies.

Living With Recurrent Stones

People who form stones repeatedly can feel frustrated, but structured prevention programs significantly reduce recurrence. Regular follow-up, periodic urine testing to check whether prevention is working, and imaging when appropriate allow adjustments. Keeping a log of fluid intake and symptoms can help. Support from clinicians, dietitians, and patient education resources helps people maintain long-term habits that keep stones from returning.

Many patients find that once they understand their personal risk factors, such as low urine volume or high urinary calcium, prevention becomes more concrete and motivating, and recurrence rates fall substantially with consistent habits and appropriate treatment.

Patient education materials from kidney and urology organizations offer practical guidance on hydration, diet, and when to seek care.

Sharing a written prevention plan with family members can also help, since household eating and drinking habits influence everyone’s risk and support long-term changes.

Small, consistent steps are more sustainable than drastic short-term changes.

Clinicians can also help patients set realistic hydration goals based on climate, activity level, and other health conditions such as heart or kidney disease that may require fluid limits, ensuring prevention advice is safe and practical for each person over the long term, including older adults and endurance athletes.

Frequently Asked Questions

Does chanca piedra dissolve kidney stones?

There is no good evidence that it dissolves existing stones. A randomized trial found no difference in stone passage or pain relief compared with placebo.

Can chanca piedra prevent kidney stones?

Small studies suggest it may favorably change urine chemistry in some patients, but trials have not shown it prevents new stones.

Is chanca piedra safe?

Short-term studies found it well tolerated, but supplement quality varies and it may interact with some medications.

What is the best way to prevent kidney stones?

Drinking enough fluid to produce at least two liters of urine daily, plus diet and medication tailored to stone type.

When should I see a doctor for a kidney stone?

For severe pain, fever, vomiting, or difficulty urinating, seek immediate care.

References

1. Nishiura JL, Campos AH, Boim MA, et al. Phyllanthus niruri normalizes elevated urinary calcium levels in calcium stone forming (CSF) patients. Urological Research. 2004;32(5):362–366. PMID 15221244
2. Pucci ND, Marchini GS, Mazzucchi E, et al. Effect of phyllanthus niruri on metabolic parameters of patients with kidney stone: a perspective for disease prevention. International Brazilian Journal of Urology. 2018;44(4):758–764. PMID 29617079
3. Boim MA, Heilberg IP, Schor N. Phyllanthus niruri as a promising alternative treatment for nephrolithiasis. International Brazilian Journal of Urology. 2010;36(6):657–664. PMID 21176271
4. Scales CD Jr, Smith AC, Hanley JM, Saigal CS. Prevalence of kidney stones in the United States. European Urology. 2012;62(1):160–165. PMID 22498635
5. Borghi L, Meschi T, Amato F, et al. Urinary volume, water and recurrences in idiopathic calcium nephrolithiasis: a 5-year randomized prospective study. Journal of Urology. 1996;155(3):839–843. PMID 8583588
6. Phillips R, Hanchanale VS, Myatt A, et al. Citrate salts for preventing and treating calcium containing kidney stones in adults. Cochrane Database of Systematic Reviews. 2015;(10):CD010057. PMID 26439475
7. Taylor EN, Stampfer MJ, Mount DB, Curhan GC. DASH-style diet and 24-hour urine composition. Clinical Journal of the American Society of Nephrology. 2010;5(12):2315–2322. PMID 20847091

Last updated: October 6, 2026