Shaggy Bracket (Inonotus hispidus)
A rare, striking orange-rust bracket fungus in Poland, parasitizing mainly apple and ash trees; a relative of chaga with limited, mostly Chinese, in vitro research into anticancer and antioxidant compounds.
Table of contents
TL;DR
A rare, striking orange-rust bracket fungus in Poland, parasitizing mainly apple and ash trees; a relative of chaga with limited, mostly Chinese, in vitro research into anticancer and antioxidant compounds.
- →Limited in vitro and mouse-model studies suggest antioxidant and anticancer activity of selected compounds — unconfirmed in humans
| Latin name | Inonotus hispidus |
|---|---|
| Family | Hymenochaetaceae |
| Active compounds | Hispidin derivatives, cyclic peptides from the mycelium |
| Form | Not applicable — no commercial product |
| Research level | Early — 2 in vitro/mouse-model studies, no human studies |
| Interactions | None documented |
| Status | Rare species in Poland (red list), inedible, not sold as a supplement |
Understand
Overview
The shaggy bracket (Inonotus hispidus) belongs to the same genus as chaga (Inonotus obliquus), though it looks nothing like it. Young fruiting bodies are soft, yellow-orange in color, and covered in bristly hairs; with age they darken and harden. It grows mainly on apple trees, more rarely on ash. In Poland the species is uncommon and appears on the red list as potentially threatened.
Current research — almost exclusively Chinese laboratory work — focuses on phenolic compounds and cyclic peptides from the mycelium. The species is not edible and is not sold as a dietary supplement.
Practically no one today derives any real health benefit from this species: the shaggy bracket doesn't exist as a supplement or food product. People looking for antioxidant or anticancer support have access to far better-studied species from the same genus (such as chaga). The only group for whom this entry has practical relevance is people interested in mycology and the direction of research into Inonotus compounds.
Where it's found
Inonotus hispidus parasitizes living hardwood trees, preferring old apple trees, but has also been recorded on ash, elm, and other fruit trees. In Poland it occurs rarely and irregularly.
Mechanism of action
Hispidin derivatives showing free-radical scavenging ability in vitro tests were isolated from fruiting bodies and mycelium. In another study, a peptide extract from the mycelium inhibited HeLa cell proliferation in vitro and in a mouse xenograft model.
The title of the cited study points directly to the mitochondrial pathway as the route by which the peptide extract from the mycelium induces apoptosis — a mechanism that typically involves cytochrome c release and caspase activation. In parallel, hispidin derivatives, a phenolic compound characteristic of the genus Inonotus, account for the described radical-scavenging activity.
Free radical scavenging
Hispidin derivatives isolated from fruiting bodies neutralized free radicals in vitro tests.
Inhibition of cancer cell proliferation
A peptide extract from the mycelium strongly inhibited HeLa cell growth in vitro.
Activation of the mitochondrial apoptosis pathway
In a mouse xenograft model, the extract induced apoptosis of cancer cells via the mitochondrial pathway.
Evidence: early-stage — based on 2 studies in this database.
Benefits
Practice
Frequently asked questions
No, though they belong to the same genus, Inonotus. Chaga forms a black, cracked crust on birch trees, while this species grows mainly on apple trees.
Dosage & timing
Typical dose
No established safe dosing range for humans
Form
Not applicable — no commercial product
All available data comes from preclinical studies and does not provide any basis for dosing in humans.
Best times to take it
- Not applicable
Safety
Side effects & contraindications
Possible side effects
No documented safety data in humans
The fruiting body is hard and inedible
Contraindications
Pregnancy and breastfeeding
Children — no data
Interactions
No documented drug interactions
Is it worth taking?
Who it's for
- Limited in vitro and mouse-model studies suggest antioxidant and anticancer activity of selected compounds — unconfirmed in humans
Not for
- Pregnancy and breastfeeding
- Children — no data
Evidence
Worth knowing
Belongs to the same genus as chaga (Inonotus obliquus), but looks completely different.
Grows most readily on old apple trees.
Studies
A peptide extract from Inonotus hispidus mycelium strongly inhibited HeLa cell proliferation in vitro and tumor growth in a mouse xenograft model, inducing apoptosis via the mitochondrial pathway.
Tang SJ et al., Journal of Ethnopharmacology, 2023
The antitumor effect of mycelia extract of Inonotus hispidus on HeLa cells via the mitochondrial-mediated pathway
Early-stage evidenceTang SJ, Shao CX, Yang Y, Ren R, Jin L, Hu D, Wu SL, Lei P, He YL, Xu J · Journal of Ethnopharmacology · 2023
A peptide extract from the mycelium strongly inhibited HeLa cell proliferation in vitro and in a mouse xenograft model, inducing apoptosis.
View studyAntioxidant hispidin derivatives from medicinal mushroom Inonotus hispidus
Early-stage evidenceZan LF, Qin JC, Zhang YM, Yao YH, Bao HY, Li X · Chemical & Pharmaceutical Bulletin · 2011
New hispidin derivatives with significant in vitro radical-scavenging activity were isolated from fruiting bodies.
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
dr Piotr ZielińskiEndocrinologist
Piotr reviews content on hormones, metabolic health and supplement pharmacology.
131 publications on this site
Medical review
Michał NowakClinical Dietitian
Michał specializes in metabolic nutrition, intermittent fasting and sports supplementation.
61 publications on this site
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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.