Beefsteak Fungus (Fistulina hepatica)
A distinctive, 'bleeding' mushroom that looks like raw meat — prized more as a culinary curiosity than a supplement; preliminary chemical studies point to a very high content of phenolic compounds.
Table of contents
TL;DR
A distinctive, 'bleeding' mushroom that looks like raw meat — prized more as a culinary curiosity than a supplement; preliminary chemical studies point to a very high content of phenolic compounds.
- →One of the richest described sources of ellagic acid among wild edible mushrooms
- →High total phenolic content and significant antioxidant activity in chemical tests
- →Preliminary in-vitro data suggest inhibition of the enzymes alpha-amylase and alpha-glucosidase
| Latin name | Fistulina hepatica |
|---|---|
| Family | Fistulinaceae |
| Active compounds | Ellagic acid and other phenolic compounds |
| Form | Fresh fruiting body, consumed occasionally — no supplement form |
| Level of evidence | Preliminary in-vitro chemical studies — no clinical studies |
| Interactions | No documented drug interactions |
| Status | An edible species, partially protected in Poland since 2014 |
Understand
Overview
The beefsteak fungus (Fistulina hepatica) is one of the most recognizable mushrooms of the forest floor — its meaty fruiting body resembles a slab of raw liver, and it 'bleeds' when cut. It grows almost exclusively at the base of oak trunks. In Poland it's a rare species, under partial protection since 2014.
The mushroom is edible, but has low culinary value — the raw flesh has a distinctly sour taste. It isn't sold as a dietary supplement, but there are a few genuine laboratory studies on its phenolic profile.
Who can genuinely benefit from this, and who probably shouldn't count on it: for people who already forage wild mushrooms and want to diversify their diet with a rare, polyphenol-rich species, occasional consumption of beefsteak fungus is a reasonable dietary choice. However, there is no basis whatsoever for treating it as an aid for blood sugar control — the data on inhibiting digestive enzymes come exclusively from test-tube experiments, not from studies in humans or even animals.
Where it's found
Fistulina hepatica grows almost exclusively at the base of old oak trunks, usually on weakened trees or in places with bark damage. Fruiting bodies appear from August to October.
History of use
The beefsteak fungus has long been known culinarily in Europe, particularly in England and France, where it was sometimes eaten raw in thin slices for its tangy, citrus-like taste. The mycelium of Fistulina hepatica also causes a characteristic dark-brown discoloration of oak wood, known in woodworking as 'brown oak.'
Mechanism of action
Chemical studies have shown that Fistulina hepatica is among the richest described sources of ellagic acid among wild mushrooms. In in-vitro chemical tests, extracts from the fruiting body showed significant antioxidant activity.
Ellagic acid, which according to HPLC analysis accounts for about 49.7% of the phenolic compounds identified in the fruiting body, is a well-known potent free-radical scavenger in the literature, though its bioavailability after ingestion is generally limited. Preliminary data on the inhibition of the enzymes alpha-amylase and alpha-glucosidase suggest a theoretical mechanism for slowing carbohydrate breakdown in the gut, described only in in-vitro enzymatic tests.
Extraction of phenolic compounds
Ellagic acid is the dominant phenolic compound identified in the fruiting body by HPLC (about 49.7% of all phenolics identified).
Neutralization of free radicals
Extracts from the fruiting body show significant antioxidant activity in chemical in-vitro tests.
Inhibition of digestive enzymes
Preliminary in-vitro tests indicate inhibition of alpha-amylase and alpha-glucosidase — enzymes that break down carbohydrates.
Theoretical slowing of sugar absorption
The mechanism remains hypothetical — it has not been confirmed in any study in humans or animals.
Evidence: early-stage — based on 2 studies in this database.
Benefits
Common myths
MythThe red juice that oozes from a cut fruiting body is real blood, or means the mushroom is toxic.
FactIt's a thick, red cell sap containing, among other things, phenolic compounds — a harmless trait of the species.
Forms & variants
Beefsteak Fungus (Fistulina hepatica) comes in several forms that differ in bioavailability and use case — the form you pick genuinely matters for how effective the supplementation is.
Young fruiting body (soft, 'bleeding')
Soft, juicy flesh resembling raw meat.
Best for: A raw culinary preparation, in thin slices
Practice
Frequently asked questions
Since 2014 the species has been under partial protection, which allows for the foraging of individual, confidently identified fruiting bodies.
Dosage & timing
Typical dose
No established dose — foraged occasionally as a wild edible mushroom
Form
Fresh fruiting body, eaten after soaking and cooking, or raw in thin slices
In Poland the species is partially protected — check local regulations before foraging.
Best times to take it
- Season: August–October
Safety
Side effects & contraindications
Possible side effects
The raw flesh has a distinctly sour, tart taste and may cause digestive discomfort
Risk of misidentification when foraging
Contraindications
Mushroom allergy
Foraging without certain species identification
Interactions
No documented drug interactions
Is it worth taking?
Who it's for
- One of the richest described sources of ellagic acid among wild edible mushrooms
- High total phenolic content and significant antioxidant activity in chemical tests
- Preliminary in-vitro data suggest inhibition of the enzymes alpha-amylase and alpha-glucosidase
Not for
- Mushroom allergy
- Foraging without certain species identification
Evidence
Worth knowing
In Poland the species has been partially protected since 2014.
It grows almost exclusively at the base of oak trunks.
Studies
Ellagic acid accounted for about 49.7% of all phenolic compounds identified in Fistulina hepatica fruiting bodies — one of the highest proportions described among wild edible mushrooms.
Ribeiro B. et al., Food and Chemical Toxicology, 2007
Phenolic compounds, organic acids profiles and antioxidative properties of beefsteak fungus (Fistulina hepatica)
Early-stage evidenceRibeiro B, Valentão P, Baptista P, Seabra RM, Andrade PB · Food and Chemical Toxicology · 2007
HPLC analysis identified five phenolic compounds, including ellagic acid accounting for about 49.7% of the phenolics identified. Extracts showed strong antioxidant activity.
View studyChromatographic and Chemometric Characterization of the Two Wild Edible Mushrooms Fistulina hepatica and Clitocybe nuda
Early-stage evidenceSaldanha A, et al. · Separations · 2025
A comparative analysis of nutritional composition and phenolic profile, confirming the species' rich phenolic profile described in earlier work.
View studySources & bibliography
Citations are illustrative for this demo version and require full bibliographic verification by the editorial team before production publication.
Compare with similar entries
About the authors of this entry
Author
Michał NowakClinical Dietitian
Michał specializes in metabolic nutrition, intermittent fasting and sports supplementation.
61 publications on this site
Medical review
dr Anna KowalczykEditor-in-Chief, Molecular Biology
Anna oversees the editorial process and scientific review of every publication in the knowledge base. She previously researched autophagy and mitochondrial biology.
50 publications on this site
Related entries
4.2Chaga (Birch Canker)
A hard, black growth found on birch trunks, traditionally brewed as a tea in Russia and Eastern Europe — today studied mainly for its exceptionally high content of antioxidant compounds.
4.1Chestnut Mushroom (Pholiota adiposa)
A culinary mushroom known in traditional Chinese and Korean medicine, with a relatively larger body of research into its polysaccharides' antioxidant and anticancer effects in vitro and in animal studies.
4.0Siberian Chaga (Inonotus obliquus)
A black, corky growth that parasitizes birch trees, traditionally brewed as a tea in Siberia and Scandinavia — rich in antioxidant compounds, but with practically no clinical studies in humans.
4.0Sanghuang (Sanghuangporus sanghuang)
A prized 'golden' mushroom from East Asia that grows on mulberry trees, studied for antioxidant, anti-inflammatory, and immunomodulatory activity — human evidence is currently almost nonexistent, and the species' taxonomy itself was confusing for decades.
3.2Ganoderma australe
One of the most common tree-dwelling fungi in the world from the genus Ganoderma, known in the UK as the 'Southern Bracket' — despite its wide distribution, it has practically no dedicated clinical research or presence on the supplement market.
4.5Turkey Tail
The mushroom behind PSK and PSP — the only fungal polysaccharides registered in Japan as drugs supporting chemotherapy. Among the most solid clinical evidence of any functional mushroom, but this is NOT a standalone cancer therapy.
Comments (2)
- KW
Kasia W. 2 weeks ago
Very clearly explained, especially the interactions section — I hadn't seen it laid out this well anywhere else.
- MT
Marek T. a month ago
Are you planning to update this with the newest study from this year? I saw an interesting meta-analysis.