Educational information, not medical advice — ask your doctor or midwife.
Zi Zhu is the dried leaf of the beautyberry shrub. It is one plant used on its own, not a blend. In Chinese medicine it is used to help slow or stop bleeding.
Healers have used it for bleeding gums, nosebleeds, coughing up blood and blood in the stool. It is also dusted on cuts, scrapes and burns. Some use it as a gargle for a sore throat.
The proof in people is thin. Most of what we know comes from lab dishes and animal tests. Long use in a tradition is not the same as proof that a herb works, and that is true here.
No one has shown how Zi Zhu works in the body. The ideas below are best guesses, not settled facts.
The leaf is rich in tannins. Tannins are plant compounds that make your mouth pucker. They make surface tissue draw in tight, which may be why a dusted leaf seems to slow oozing from a small wound.
Lab tests hint that the leaf may make blood clot a little faster and may calm swelling. These tests were done outside the body or in animals. That does not tell us what a cup of the tea does in a person.
In Chinese medicine terms, Zi Zhu is said to cool heat in the blood and hold blood in its vessels. That is a way of sorting herbs by pattern. It is not a lab finding.
Zi Zhu comes in a few simple forms.
Dried cut leaf is boiled in water to make a strong tea, called a decoction. Ground leaf powder is taken by mouth or dusted straight onto a small wound. Some shops sell it as granules, tablets or as part of a mixed herb formula.
In Chinese hospitals it has also been given as a shot. That form is only used by staff there. It is not something you can or should buy for home use.
Zi Zhu has a long record in Chinese herb books. Old texts list it among the herbs used to stop bleeding.
It stayed a common folk herb in south China and Taiwan, where the shrub grows well. Village use focused on bleeding gums, nosebleeds and wounds.
A related shrub, American beautyberry, has its own folk history in the southern United States. That use is separate and mostly about keeping bugs away.
Some reactions to Zi Zhu need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
See a doctor the same day if bleeding does not stop after ten minutes of firm pressure, or if it keeps coming back.
Get emergency help now if you cough up or vomit blood, pass black tarry stools, bleed heavily from the back passage, or feel faint, cold and clammy.
Also book a normal appointment if you bruise easily, have nosebleeds most days, have periods that soak through a pad every hour, or start feeling short of breath and very tired. These can point to a clotting problem or low iron that needs testing.
Stop the herb and ask a pharmacist or doctor if you get a rash, swelling of the lips or face, or any new symptom after starting it.
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 Zi Zhu 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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