Zhu Ling (Polyporus umbellatus): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Zhu Ling work as a diuretic?

Zhu Ling (Polyporus umbellatus) promotes diuresis primarily by inhibiting the reabsorption of water and electrolytes in the renal tubules. The active compounds, specifically polysaccharides and triterpenoids, increase urine volume without significantly disrupting electrolyte balance. This mechanism aligns with its Traditional Chinese Medicine function of resolving 'Dampness' and promoting urination. While the exact physiological pathway requires further clinical validation, animal studies support its efficacy in reducing fluid retention (Evidence Level C).

Does Zhu Ling interact with diuretic medications?

Yes, Zhu Ling has potential interactions with pharmaceutical diuretics like furosemide or hydrochlorothiazide. Because Zhu Ling is a potent diuretic itself, combining it with prescription diuretics may have an additive effect, leading to excessive fluid loss, dehydration, or electrolyte imbalances such as hypokalemia. Patients taking antihypertensive medications should also use caution, as the combined effects may lower blood pressure excessively. Always consult a healthcare provider before combining herbal and pharmaceutical diuretics (Evidence Level C).

What is the standard dosage for Zhu Ling mushroom?

The standard adult dosage for Zhu Ling depends on the form used. For a traditional decoction, the dosage is typically 6 to 12 grams of the dried mushroom simmered in water. For concentrated extract capsules, a common dosage is 500 mg taken twice daily. Dosage may vary based on the specific condition, such as edema or urinary tract infections. It is best to follow a qualified practitioner's recommendation, as individual needs vary (Evidence Level Traditional).

Is Zhu Ling safe to take during pregnancy?

No, Zhu Ling is considered unsafe during pregnancy and is contraindicated. Its strong diuretic properties can deplete fluids and potentially disrupt the fluid balance necessary for fetal development. Additionally, Traditional Chinese Medicine theory advises against using this herb during pregnancy due to its draining nature. There is insufficient safety data regarding its use while breastfeeding, so it should be avoided in both scenarios unless specifically prescribed by a qualified healthcare provider (Evidence Level D).

What is Zhu Ling used for in Traditional Chinese Medicine?

In Traditional Chinese Medicine (TCM), Zhu Ling is primarily used to promote urination and resolve 'Dampness.' It is commonly prescribed for conditions involving fluid accumulation, such as edema, urinary difficulty, and urinary tract infections. It is also used to treat jaundice and diarrhea associated with Damp-Heat. Furthermore, Zhu Ling is valued for its immunomodulatory effects and is a key ingredient in formulas like Zhu Ling Tang, used to support immune function (Evidence Level C/Traditional).

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Zhu Ling (Polyporus umbellatus) is an edible and medicinal fungus used primarily for its diuretic properties and treatment of kidney-related diseases [PMID: 23811047, 35667259, 39834535].

Background

Polyporus umbellatus (Pers.) Fries is a rare porous fungus in the Polyporaceae family distributed in the Northern hemisphere [PMID: 23811047, 40953213, 39834535]. The medicinal part is the dry sclerotia, the growth of which is dependent on a symbiotic relationship with Armillaria species [PMID: 29139256, 35185819, 40005595].

Traditional uses

It has been commonly used in medicine for ailments related to edema, scanty urine, vaginal discharge, urinary dysfunction, jaundice, and diarrhea [PMID: 23811047]. It is reported to exhibit functions of diuresis and dampness infiltration in traditional Chinese Medicine [PMID: 34419536].

Active compounds

The primary bioactive components are polysaccharides (PUPs), which are composed of monosaccharides including glucose, glucuronic acid, galactose, ribose, xylose, arabinose, mannose, and fucose [PMID: 31030753, 31602930, 34419536]. Other secondary metabolites include steroids (such as ergone and polyporusterones A-G), anthraquinones, and nucleosides [PMID: 23811047, 20458671, 1576664].

Mechanism of action

Polyporus umbellatus polysaccharides (PUP) may inhibit the Wnt/β-catenin and NF-κB signaling pathways to alter inflammatory mediator secretion and remodel gut microbiota [PMID: 40527375]. In breast cancer, it may suppress cell proliferation by down-regulating AKT activation [PMID: 27447121]. It may also induce M1 polarization of tumor-associated macrophages via IFN-γ secretion and NF-κB activation [PMID: 37586629].

Clinical evidence

Evidence CHepatitis B

Polyporus umbellatus polysaccharide (PUPS) capsules and injections are SFDA-approved drugs used alone or in combination for treating Hepatitis B [PMID: 31030753]

Evidence DRenal Fibrosis

Polysaccharides from P. umbellatus sclerotia (PPUS) improved renal function and ameliorated renal collagen deposition and fibrosis [PMID: 30832835]

Evidence DBladder Cancer

Aqueous extract of sclerotia and polyporus polysaccharide were effective in inhibiting bladder carcinogenesis in female Fischer-344 rats [PMID: 21213404]

Evidence DBreast Cancer

P. umbellatus inhibited tumor cell proliferation and volume in nude mice by down-regulating AKT [PMID: 27447121]

Evidence DRheumatoid Arthritis

PUP reduced bone loss, cartilage degradation, and joint edema in CIA mouse models [PMID: 40527375]

Evidence summary

The evidence consists primarily of in vitro studies, animal models (mice/rats), and literature reviews. There is clinical use of approved PUPS preparations in China, but high-level clinical trial data (RCTs) are not provided in the abstracts.

PubMed sources

1.PMID: 23811047 (2013) — Traditional uses, phytochemistry, pharmacology, pharmacokinetics and quality control of Polyporus umbellatus (Pers.) Fries: a review. · Journal of ethnopharmacology
2.PMID: 31030753 (2019) — The efficacy of Polyporus Umbellatus polysaccharide in treating hepatitis B in China. · Progress in molecular biology and translational science
3.PMID: 40527375 (2025) — Polyporus Umbellatus polysaccharide ameliorates rheumatoid arthritis via inhibiting inflammation and regulating gut microbiota. · International journal of biological macromolecules
4.PMID: 32749102 (2020) — Do the Main Components of the Sclerotia of Umbrella Polypore Mushroom, Polyporus umbellatus (Agaricomycetes), Correlate with Armillaria Associates? · International journal of medicinal mushrooms
5.PMID: 35667259 (2022)

Zhu Ling

Sources & Citations

Calculate a safe dose of Zhu Ling

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Frequently asked questions

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Evidence summary

PubMed sources

Government sources

Zhu Ling

Sources & Citations

Calculate a safe dose of Zhu Ling

Related Herbs

Pashanbheda

Trailing Arbutus

Heal All Spica

Frequently asked questions

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Evidence summary

PubMed sources

Government sources