Educational information, not medical advice — ask your doctor or midwife.
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Dong Kui Zi is the dried seed of the cluster mallow plant. Its Latin name is Malva verticillata. It is one single herb, not a blend of many.
In Chinese medicine it is used for hard or painful peeing. It is also used for dry, hard stools. Some old texts use it to help breast milk flow.
Here is the short verdict on proof. We found no good human trials of this seed. Long use in a tradition is not the same as proof that it works, so treat its uses as tradition only.
No one has shown how this seed works in the body. The ideas below come from lab work and from old texts.
The seed holds a lot of mucilage. Mucilage is a sticky fibre that swells in water. In the gut it may hold water and make stools softer and easier to pass.
Some lab and animal work hints at a mild water-losing effect. That means the body may pass a bit more urine (pee). This has not been tested well in people.
In Chinese terms the seed is sweet and cold. It is said to drain heat and damp down and out of the body.
The most common form is a tea. The seeds are crushed, then boiled in water for 20 to 30 minutes.
You may also see it as a plain powder or in pills. Most often a herbalist puts it in a mix with other herbs.
A few products sell it as a liquid extract. These are not made to one set standard, so amounts vary a lot.
The seed is named in the Shen Nong Ben Cao Jing, an old Chinese herb book from about 200 CE. So its use goes back close to 2000 years.
It has stayed a standard herb in China since then. It is used much less in the West, and few Western studies exist.
See a doctor if peeing burns, if there is blood in your urine, or if you have a fever with back pain. These can mean an infection that needs antibiotics.
Get help the same day if you cannot pee at all, if you have severe belly or back pain, or if you feel faint, very weak or your heart is racing.
Also call your doctor if diarrhoea lasts more than two days, if you cannot keep fluids down, or if your legs, face or belly swell up.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Dong Kui Zi is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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