Lian Xu
Quick Facts
- What it is: Lian Xu is the dried stamen of the lotus flower, used as a single astringent herb in Chinese medicine.
- Main uses: Frequent or night-time urination, Involuntary loss of urine, Seminal emission, Vaginal discharge, Restlessness and poor sleep
- Best for: People already working with a Chinese medicine practitioner on urinary or reproductive complaints
- Active ingredients: Tannins, Kaempferol and other flavonoid glycosides, Quercetin and myricetin derivatives, Trace benzylisoquinoline alkaloids
- Forms: Dried stamens for decoction (a strong tea made by boiling), Concentrated granules or powder, Loose tea blends, Capsules within multi-herb formulas
- Time to effect: Not established; tradition judges it over one to two weeks of steady use.
- Side effects: Usually mild: constipation, dry mouth, stomach upset or trouble passing urine.
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What is Lian Xu?
What is Lian Xu, and what is it used for?
Lian Xu is a single herb. It is the dried stamens of the lotus, Nelumbo nucifera. Stamens are the thread-like male parts inside the flower.
In English it is usually called lotus stamen. It is not a formula or a blend. Even so, it is nearly always used with other herbs.
Chinese medicine calls it an astringent (a herb thought to "hold things in"). Practitioners have used it for leaking urine or semen. They also used it for frequent night-time urination and for vaginal discharge.
Some older texts use it for restlessness and poor sleep.
The honest verdict: the traditional record is long and steady. But almost no human trials have tested lotus stamen on its own.
Long traditional use tells you what people have done with a herb. It does not tell you that the herb works. That point applies to everything on this page.
How does Lian Xu work?
How is Lian Xu thought to work?
No one has shown a clear mechanism (a way it acts in the body) in people. So what follows is theory, not proven action.
In Chinese medicine terms, lotus stamen is sweet, astringent and neutral. It is said to enter the kidney and heart channels. It is thought to "secure essence" (stop leakage of fluids) and to settle an unquiet mind.
In plain terms, the stamens hold tannins. Tannins are plant compounds with a drying, puckering quality. In a test tube, they can tighten the surface of mucous membranes (the moist linings of the body).
Whether that means any real effect on the bladder or on sleep is unknown. It has not been tested in humans.
Lab studies of lotus flower and stamen extracts report antioxidant activity. That means they mop up reactive molecules in a dish.
This is a routine finding for plant extracts. It does not predict a benefit in a person.
What forms does Lian Xu come in?
What forms does it come in?
Dried whole stamens are the traditional form. They are sold loose by weight. You simmer them in water as a decoction (a strong tea made by boiling).
Other forms you may see:
Granules or strong powders. The herb is pulled out with liquid, dried, then stirred into hot water.
Loose-leaf tea blends, where lotus stamen is one herb among several.
Capsules and tablets. These are usually part of a multi-herb product, not the herb on its own.
Patent formulas from Chinese medicine, such as Jin Suo Gu Jing Wan. They hold lotus stamen along with other astringent herbs.
Strengths are not set to any marker compound. So one supplier's product is not the same as another's.
Where it comes from:
Where does it come from?
Lotus stamen is a classic Chinese herb. Chinese herb books recorded it from about the Song and Ming dynasties. It is still listed in the modern Chinese Pharmacopoeia.
The lotus is unusual. Chinese medicine treats nearly every part of it as a separate herb:
the seed (Lian Zi)
the seed sprout (Lian Zi Xin)
the leaf (He Ye)
the node of the rhizome, or root stem (Ou Jie)
the stamen (Lian Xu)
Each part has its own traditional role.
Lotus stamen is also drunk as a scented tea in China and Vietnam. The plant is a food crop across East and South Asia. It is a long-standing staple of one tradition, not a herb shared by many.
Who should avoid Lian Xu?
- Do not use if you are constipated or often have hard, dry stools, because this herb has a drying, tightening action.
- Do not use if you have trouble passing urine, a weak stream, or a known blockage such as an enlarged prostate, unless a doctor has cleared it.
- Do not use if you have burning when you pass urine, fever, or blood in your urine — these need medical assessment, not an astringent herb.
- Do not use if you are pregnant or breastfeeding; there is no safety information for these situations.
- Do not give it to a child, including for bed-wetting, unless a qualified practitioner is directing the treatment.
- Do not use if you are allergic to lotus or have reacted to lotus seed, root or leaf before.
- Do not use it in place of treatment your doctor has prescribed for a diagnosed bladder, prostate or gynaecological condition.
- Do not take it within two hours of iron tablets or of a medicine with a narrow safe dose range, such as levothyroxine, digoxin or lithium.
When should you see a doctor?
See a doctor if you cannot pass urine, if passing urine burns, or if you see blood in your urine. Get checked promptly for fever, back or side pain, or new pain in the lower belly.
Book an appointment if urinary symptoms, discharge or sexual symptoms have lasted more than two weeks, or if they are getting worse while you take this herb.
Stop and seek urgent help if you get a rash, swelling of the face, lips or tongue, or difficulty breathing.
If you have diabetes, contact your prescriber if your blood sugar readings change after starting or stopping the herb.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
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