Birch Polypore (Fomitopsis betulina): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Birch Polypore work as an antimicrobial?

Birch Polypore contains several bioactive compounds that contribute to its antimicrobial action. Piptamine and polyporenic acids have demonstrated activity against various bacteria and fungi in laboratory studies. Betulinic acid and terpenoids provide additional therapeutic effects. These compounds may disrupt microbial cell membranes and inhibit pathogen growth. The mushroom's antimicrobial mechanism supports its historical use for wound healing and infection management. Evidence level: C (preclinical and traditional).

Does Birch Polypore interact with any medications?

Birch Polypore may interact with immunosuppressant medications and drugs prescribed for autoimmune conditions. The mushroom contains immune-modulating compounds that could potentially interfere with these treatments. Individuals taking corticosteroids, biologics, or other immunosuppressive drugs should avoid Birch Polypore. No well-documented interactions with common medications exist, but caution is advised. Always consult a qualified healthcare provider before combining with prescription medications. Evidence level: C.

What is the recommended dosage for Birch Polypore?

The typical adult dosage for Birch Polypore is 2 cups of dried mushroom tea daily, or 500mg to 1g of standardized extract per day. For wound healing, traditional preparations have been applied topically to the affected area. Start with lower doses to assess tolerance, as mild digestive upset may occur in some individuals. Standardized extracts provide more consistent dosing than teas. Evidence level: C and Traditional use.

Is Birch Polypore safe during pregnancy and breastfeeding?

Birch Polypore is considered unsafe during pregnancy and should be avoided in medicinal doses. There is insufficient safety data regarding its use while pregnant or breastfeeding. The mushroom contains bioactive compounds including polyporenic acids and betulinic acid that may affect fetal development or pregnancy outcomes. Women who are pregnant, nursing, or attempting to conceive should not use Birch Polypore without explicit guidance from a qualified healthcare provider. Evidence level: C.

What was Birch Polypore used for historically?

Birch Polypore has been used for wound healing and antimicrobial purposes since ancient times. The most famous evidence comes from Otzi the Iceman, who carried this mushroom 5,300 years ago, likely for treating parasites and wounds. Traditional European applications include treating parasitic infections, supporting digestive health, and addressing fatigue. The mushroom was applied topically for wounds and consumed internally as a tea for various ailments. Evidence level: 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

Fomitopsis betulina (formerly Piptoporus betulinus) is a wood-rotting basidiomycete fungus with a long history of use in folk medicine for its antimicrobial, anticancer, and anti-inflammatory properties [PMID:28378220].

Background

Fomitopsis betulina is a macrofungus that causes brown rot of birch wood in the northern hemisphere [PMID:28378220]. It is known as the 'Iceman's fungus' because pieces of its fruiting body were carried by Ötzi the Iceman [PMID:28378220, PMID:30806295].

Traditional uses

In central European folk medicine, it has been used to treat cancer, rheumatism, coughs, pyretic diseases, bladder disorders, haemorrhoids, and dysmenorrhoea [PMID:24786572]. It has also been traditionally applied as an antimicrobial, anticancer, and anti-inflammatory agent [PMID:28378220].

Active compounds

Bioactive compounds include triterpenoids (such as lanostane-type triterpene acids, piptolinic acids, and polyporenic acids) [PMID:28378220, PMID:30362364, PMID:28800422], polysaccharides (including alpha- and beta-glucans) [PMID:39330376, PMID:30177176], phenols, gallic acid, quinic acid, and polyamines such as spermidine, spermine, and putrescine [PMID:39330376, PMID:41422539]. Betulin is also identified as an active compound in ethanolic extracts [PMID:36430391].

Mechanism of action

Extracts and specific compounds have demonstrated the ability to induce apoptosis in cancer cells [PMID:31440877]. Certain lanostane-type triterpene acids suppress TPA-induced edema [PMID:12932134], and specific hydroquinones act as matrix metallo-proteinase inhibitors [PMID:12596882].

Clinical evidence

Evidence DCancer (various cell lines)

Methanolic, ethanolic, and aqueous extracts exhibit selective cytotoxicity against cancer cells (including prostate, melanoma, lung, and colorectal) while showing minimal impact on healthy cells [PMID:39512529, PMID:39408283, PMID:36430391, PMID:22181840].

Evidence DInflammation

Lanostane-type triterpene acids suppressed TPA-induced edema on mouse ears by 49-86% [PMID:12932134].

Evidence DImmune Response

Water and methanol extracts did not induce significant apoptosis or necrosis of T cells and monocytes, nor did they significantly alter T-cell activation or dendritic cell maturation [PMID:30806295].

Evidence DCardiovascular Parameters

Acute and subchronic (14 days) oral administration of crude ethanolic extract, fractions, and stigmasterol did not alter mean arterial pressure, heart rate, or renal blood flow in normotensive male Wistar rats [PMID:28605341].

Safety & adverse effects

In vitro studies indicate selective cytotoxicity, with extracts showing low cytotoxicity toward normal human skin fibroblasts and normal colon epithelium cells [PMID:36430391, PMID:22181840]. In vivo rat models showed no alteration of cardiovascular parameters after subchronic oral administration [PMID:28605341].

Evidence summary

The current evidence is primarily based on in vitro cell culture studies and preclinical animal models (Level D), demonstrating potential anticancer and anti-inflammatory activities, though human clinical trials are lacking.

PubMed sources

1.PMID: 28378220 (2017) — Fomitopsis betulina (formerly Piptoporus betulinus): the Iceman's polypore fungus with modern biotechnological potential. · World journal of microbiology & biotechnology
2.PMID: 39512529 (2024) — Cytotoxic activity of Fomitopsis betulina against normal and cancer cells - a comprehensive literature review. · Contemporary oncology (Poznan, Poland)
3.PMID: 39330376 (2024) — Secondary Metabolites of Fomitopsis betulina: Chemical Structures, Biological Activity and Application Prospects. · Journal of fungi (Basel, Switzerland)
4.PMID: 30806295 (2018) — Effects of Birch Polypore Mushroom, Piptoporus betulinus (Agaricomycetes), the "Iceman's Fungus", on Human Immune Cells. · International journal of medicinal mushrooms
5.PMID: 24786572 (2014) — European medicinal polypores--a modern view on traditional uses.

Birch Polypore

Sources & Citations

Calculate a safe dose of Birch Polypore

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Frequently asked questions

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Evidence summary

PubMed sources

Government sources

Birch Polypore

Sources & Citations

Calculate a safe dose of Birch Polypore

Related Herbs

Temulawak

Vasconcellea quercifolia

Musa balbisiana

Frequently asked questions

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Evidence summary

PubMed sources

Government sources