What is Stone breaker (chanca piedra)?

Stone breaker is a small tropical weed drunk as a herbal tea. Its botanical name is Phyllanthus amarus. In Yoruba it is called eyin olobe.

The plant grows knee-high or lower. It has tiny leaves in two rows and small green fruits hanging under the stem. In West Africa the whole plant is pulled up, washed and boiled in water.

It is best known for claims about kidney stones, gallstones and liver trouble. The English and Spanish names both mean "stone breaker". That name comes from tradition, not from proof.

Human evidence for any of these uses is thin and mixed. Long traditional use does not prove that a remedy works, and it does not prove that a remedy is safe.

How does Stone breaker (chanca piedra) work?

No one has shown clearly how stone breaker acts in the human body.

In test tubes, extracts slow the growth and clumping of calcium oxalate crystals. Those crystals are the main material in most kidney stones. Whether the same thing happens inside a human kidney is not known.

In rats given stone-forming diets, extracts reduced the number of crystals in the kidney. Animal results often fail to repeat in people.

In cell studies, some compounds block an enzyme that hepatitis B virus uses to copy itself. Human studies have not matched that finding in a steady, repeatable way.

In animal work, extracts relaxed smooth muscle and lowered blood sugar and blood pressure. People who take drugs for diabetes or blood pressure should treat that as a warning, not a benefit.

What forms does Stone breaker (chanca piedra) come in?

Stone breaker reaches people in several forms.

- Fresh or dried whole plant, boiled as a tea or decoction.

- Loose dried herb in bags, for brewing at home.

- Capsules and tablets of dried powder.

- Liquid tinctures and drops.

- Standardised extracts, labelled for lignan content.

- Mixed formulas sold for "kidney support" or "liver support".

The West African tradition uses the boiled whole plant. Most products sold online are capsules or extracts, which are stronger and less familiar.

Mixed formulas are the hardest to judge. If a product holds six herbs, you cannot tell which one caused a benefit or a problem.

Where it comes from:

Stone breaker has a long record in West African home medicine. Yoruba herbalists knew it as eyin olobe and used the boiled plant for jaundice, stomach pain and urinary complaints.

It also carries deep traditions elsewhere. In India it is bhumi amla, used in Ayurveda for liver and digestive complaints. In South America it is chanca piedra, used for stones and urinary pain.

That spread across continents is unusual for a weed. It shows the plant was widely trusted. It does not show that the plant worked.

These paragraphs describe what people did in the past. They are not a suggestion that you treat yourself the same way.

What does Stone breaker (chanca piedra) help with?

• Kidney stones: This is the main claim and the weakest part of the evidence. Tradition held that the boiled plant softened or broke stones and helped them pass. Test tube and animal work gives some support to the crystal idea. Human studies are small and short. They do not show that stone breaker clears stones or stops them coming back. Severe stone pain, fever or blood in urine needs a doctor, not a tea.
• Gallstones: Tradition used the same plant for pain under the right ribs. There is no good human evidence that it dissolves or shifts gallstones. A gallstone stuck in a duct is an emergency. It can cause jaundice and infection and needs hospital care.
• Chronic hepatitis B: This is the use with the most published research, and the research is still not convincing. In cell studies, some compounds slow the virus. Human trials have been small and have disagreed with each other. Modern antiviral drugs for hepatitis B do work and are well tested. Never swap them for a herb.
• Jaundice and other liver complaints: Yoruba and Ayurvedic use for yellow eyes and skin is old and widespread. Human evidence that the plant protects or repairs the liver is weak. Jaundice always needs a cause found. It can mean hepatitis, blocked ducts, or something more serious.
• High blood sugar: Some animal studies show a drop in blood sugar after extracts are given. Human evidence is thin. The practical point is safety, not benefit. If you take insulin or diabetes tablets, adding this herb may push your sugar too low.
• Stomach upset and colic: The tea was used for cramping, wind and loose bowels. No good human trials test this. In animal tissue, extracts relaxed gut muscle. Oddly, the tea itself upsets some people's stomachs.
• Fevers, including malaria fever: Across West Africa the plant was one of many fever remedies. There is no human evidence that it treats malaria. Malaria can kill quickly. If you have fever after being in a malaria area, get tested the same day.

Which foods are rich in Stone breaker (chanca piedra)?

Stone breaker is not a nutrient, so no food is rich in it. You get it only from the plant itself, as tea, capsules or drops.

What are the side effects of Stone breaker (chanca piedra)?

• Stomach upset or nausea
• Loose stools or diarrhoea
• Stomach cramping
• Low blood sugar, mainly in people on diabetes drugs
• A drop in blood pressure, with dizziness
• Needing to pass urine more often
• Skin rash or itching, rarely
• Painful passing of a stone that was already there

Good to know:

Most reported side effects are mild and settle when people stop.

The gut effects are the common ones. The blood sugar and blood pressure effects matter most in people already on medicine for those problems.

Serious harm reports are rare. But the plant has not been tracked in large safety studies, so rare harms could be missed.

Stop and get advice if you get a rash, yellow eyes or skin, or pain that is getting worse.

How much Stone breaker (chanca piedra) should you take?

• Recommended daily: Stone breaker is not a high-risk herb, so a general label range can be given. This is what products carry, not advice for you. - Dried herb tea: labels often list 1 to 3 grams of plant per cup. - Capsules: often 400 to 500 mg each, with one to three a day. - Tinctures: dose varies widely by strength, so the bottle sets the figure. Products differ hugely in strength. The same dose of two brands is not the same dose of plant. If you take medicine for diabetes, blood pressure, clotting or hepatitis B, settle the dose question with a doctor or pharmacist first.
• Best time of day: Time of day does not matter much for this herb. There is no evidence that morning or evening works better. People who find it loosens the bowels often prefer the day, not bedtime.
• With or without food: Either is fine for most people. Taking it with food may ease stomach upset. If you have diabetes, taking it at the same point each day makes blood sugar changes easier to spot.
• Time to effect: There is no reliable answer, because the effect itself is unproven. Any mild change in digestion would show within days. Claims about stones or the liver have no proven timeline. It may do nothing at all. That is a real possible outcome here.
• How long to take it: Traditional use was short. The tea was drunk for days or a few weeks while a problem lasted. No one has studied long, daily use in people. Safety over months or years is simply unknown. If you feel no change after a few weeks, longer use is unlikely to help.