Educational information, not medical advice — ask your doctor or midwife.
Zong Lu Pi is the coarse brown fibre taken from the leaf stalk of the windmill palm, Trachycarpus fortunei. In Chinese medicine it is nearly always charred before use, when it is called Zong Lu Tan, and it is used as an astringent (a substance that tightens tissue) to slow bleeding.
It is a single drug, not a blend. Traditional practitioners use it for heavy menstrual bleeding, bleeding from the gut or urinary tract, and nosebleeds. It almost always appears as a supporting ingredient inside a larger formula rather than on its own.
The honest verdict is simple. Zong Lu Pi has a long and settled place in Chinese herbal practice, but there is almost no modern human trial evidence behind it, and traditional use is not proof that a remedy works. Bleeding of any kind needs a doctor to find the cause first.
The traditional idea is straightforward: the charred fibre is thought to tighten and hold, so bleeding slows.
In modern terms, the plausible mechanism is tannins. Tannins are plant compounds that bind proteins and can make surface tissue contract, which is the same reason strong tea tastes drying in the mouth. Charring also produces porous carbon, which may absorb fluid and irritants in the gut.
This is a reasonable explanation, not a proven one. No good human study has shown that Zong Lu Pi shortens or lightens bleeding in people, and any effect on bleeding deep inside the body, such as in the womb, is speculation rather than established fact.
Zong Lu Tan, the charred fibre, is the usual form. It is the one traditional texts call for when bleeding is the goal.
You may also meet it as:
Raw dried fibre, cut or shredded, for decoction (boiling in water).
A fine black powder, sometimes pressed into pills.
An ingredient in ready-made Chinese patent formulas for heavy periods.
It is not sold as a standardised extract, and it is not used as an essential oil.
The windmill palm grows across southern and central China, and its fibre has been used for rope, brushes and matting for centuries. Its medical use is recorded in Chinese materia medica from roughly the Song and Ming periods onward.
It is classed among the herbs that restrain bleeding, alongside remedies such as Di Yu and Ce Bai Ye. Its standing is that of a reliable minor herb within one tradition rather than a famous headline remedy.
See a doctor straight away if you are soaking through a pad or tampon every hour, passing large clots, or feel faint, breathless or very pale. Get urgent care for black or tarry stools, blood in vomit, or blood in your urine.
Book a routine appointment if your periods have become heavier than usual, if you bleed between periods, if you bleed at all after the menopause, or if diarrhoea lasts more than a week.
Stop the herb and speak to a pharmacist or doctor if you develop a rash, or if you take regular prescription medicine and notice it working less well.
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 Zong Lu Pi 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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