Educational information, not medical advice — ask your doctor or midwife.
Carry-me-seed is a small weedy plant, Phyllanthus amarus. It grows across West Africa, India and much of the tropics. In Yoruba it is called eyin olobe.
Tiny fruits sit in a row under each leaf stem. That look gave it names like stonebreaker and chanca piedra. The whole plant is used, roots and all.
People take it mainly as a bitter tea. It is used for jaundice (yellow skin and eyes), liver complaints, stones, fever and belly upsets. It is also sold as capsules, powders and tinctures.
Here is the honest verdict. Human trials are few, small and poorly run. Their results do not agree with each other.
Long use in a tradition is not proof that a remedy works. It is also not proof that it is safe. Both of those apply to this plant.
One more practical point. Shops often mix up Phyllanthus amarus with its look-alike cousins, Phyllanthus niruri and Phyllanthus urinaria. If a label does not name the species, you do not know what is in the bag.
No one has shown clearly how this plant acts in the human body.
Almost all the mechanism work comes from test tubes and animals. Those results do not carry over to people on their own.
In test tubes, extracts slow the hepatitis B virus from copying itself. In rodents, they soften chemical damage to the liver. Whether this happens in a human liver is not established.
Lab work also suggests the extracts mop up free radicals (unstable molecules that can harm cells). In animals, they have lowered blood sugar and raised urine flow.
For stones, the idea is that it stops tiny crystals from sticking together. Small human studies of related Phyllanthus species hint at a modest effect. That work is too small to settle anything.
The plant is rich in tannins, which bind iron and some drugs in the gut. In lab tests, extracts also nudge the liver enzymes that break down medicines. That is one reason drug interactions are a real worry.
The usual West African form is the dried or fresh whole plant, boiled or steeped as a bitter tea.
Other forms you will meet:
Capsules and tablets made from dried plant powder.
Liquid tinctures in alcohol, and sweet glycerites.
Standardised extracts, sold by their lignan content.
Loose powder stirred into water or pap.
Mixed herbal tonics and bitters, where it is one herb among many.
Label quality varies a lot. Species get swapped, and mixed tonics may hide herbs you did not expect.
If you do buy it, pick a seller who names Phyllanthus amarus on the label. A product that only says stonebreaker tells you almost nothing.
Phyllanthus amarus has long standing in West African home medicine.
Yoruba healers gave eyin olobe as a bitter tea. It was used for jaundice, fevers, belly pain and urinary trouble. Igbo and Ghanaian healers used it in much the same way.
In Ayurveda, close relatives were given as bhumi amla for liver and urinary complaints. In Brazil and the Caribbean the name chanca piedra means stone breaker.
Colonial-era plant lists of the 1800s and 1900s recorded it among the common bitter weeds used by healers.
Interest grew in the 1980s, when Indian researchers tested Phyllanthus against hepatitis B. Trials followed in several countries. The results were mixed and the studies were small.
These records describe what people did with the plant. They do not record what it achieved, and they do not record a safe dose.
Stop taking it and see a doctor if any of these happen.
Your skin or the whites of your eyes turn yellow, or your urine turns dark.
You have bad or lasting pain in your belly or back.
You bruise easily, or bleeding does not stop as usual.
You feel shaky, sweaty or confused, which can mean low blood sugar.
You get a rash, swelling of the face or lips, or trouble breathing. Call emergency services for breathing trouble or face swelling.
See a doctor promptly for any fever with chills, blood in your urine, or jaundice. These need a diagnosis, not a herbal tea.
In the UK, the US, Canada and Australia it is sold as a food supplement or herbal product, not as an approved medicine. In Nigeria and Ghana it is sold freely as a herb, and packaged products are meant to be registered with the national regulator.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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