Schizophyllum radiatum
A rare relative of the split gill, practically indistinguishable by eye — in the scientific literature it appears almost exclusively in the context of molecular taxonomy and rare respiratory-tract infections, not as a supplement.
Number of studies
2
Safety
Moderate
Time to effects
Not applicable
Who it's for
Table of contents
TL;DR
A rare relative of the split gill, practically indistinguishable by eye — in the scientific literature it appears almost exclusively in the context of molecular taxonomy and rare respiratory-tract infections, not as a supplement.
- →No documented health benefits whatsoever — the species has not been separately studied for bioactive compounds
| Latin name | Schizophyllum radiatum |
|---|---|
| Family | Schizophyllaceae |
| Active substances | None identified — no separate phytochemical studies have been conducted |
| Form | None — the species does not exist in any form intended for consumption |
| Level of evidence | Hypothesis — the literature is limited to molecular taxonomy and clinical case reports |
| Interactions | Not applicable |
| Status | A rare species described in 1855; documented as an opportunistic pathogen of the airways and sinuses |
Understand
Overview
Schizophyllum radiatum is a fungal species already described in 1855, morphologically almost identical to the split gill (Schizophyllum commune). Reliably distinguishing the two species requires molecular analysis.
This species is far better documented in the scientific literature as an object of clinical mycology than as an organism with any health-promoting potential. A landmark 2016 study found that 22 of 23 clinical isolates in the US, previously identified as Schizophyllum commune, actually belonged to S. radiatum. There is no supplement form, culinary use, or ethnomycological tradition associated with this species.
Who might find this useful? Practically no one, as a source of health benefits — there isn't a single documented benefit, supplement form, or tradition of consumption. The entry may interest only mycologists working on the taxonomy of the genus Schizophyllum and clinical microbiologists distinguishing rare fungal infections.
Where it's found
Given its morphological similarity to S. commune, it is assumed the species occupies a similar ecological niche — decomposing dead deciduous wood — though its precise geographic distribution remains poorly studied.
Mechanism of action
No bioactive compound has been identified so far. Unlike the closely related S. commune, for which the polysaccharide schizophyllan has been described, no separate phytochemical studies have been conducted on S. radiatum — the difficulty of distinguishing the two species meant it was simply confused with S. commune for decades.
The only documented 'mechanism' associated with this species concerns not health but pathogenesis: inhaled spores can colonize the mucosa of the sinuses and airways, leading — especially in people with weakened immunity — to invasive fungal sinusitis. For decades these infections were mistakenly attributed to S. commune, until 2016 molecular analysis revealed the species distinction.
Morphological similarity to S. commune
Confused with S. commune for decades due to an almost identical fruiting-body structure.
Molecular differentiation
A 2016 study revealed that 22 of 23 clinical isolates identified as S. commune were actually S. radiatum.
Spore inhalation and airway colonization
Documented clinical cases link spore inhalation to sinus and airway infections.
Invasive infection
A documented case of invasive fungal sinusitis occurred even in an immunocompetent patient.
Evidence: limited — based on 2 studies in this database.
Benefits
Common myths
MythIt's just a variant of the split gill, so it has the same documented properties.
FactS. radiatum is a distinct species. Research on schizophyllan concerns S. commune — there's no evidence that S. radiatum contains identical compounds.
Practice
Frequently asked questions
It is sometimes isolated as a rare, opportunistic pathogen of the airways and sinuses, mainly in people with weakened immunity — it is not a candidate for a dietary supplement.
Dosage & timing
Typical dose
Not applicable — the species does not exist in any form intended for consumption
Form
None
All available literature is mycological or clinical in nature, not nutritional or related to supplementation.
Best times to take it
- Not applicable
Safety
Side effects & contraindications
Possible side effects
Documented clinical cases link this species to respiratory-tract and sinus infections — this isn't a 'supplement side effect' but a documented role as an opportunistic pathogen
Contraindications
Inhaling spores is not advisable, especially for people with weakened immunity or chronic lung disease
There is no safe oral form
Interactions
Not applicable — no supplement or dietary form exists
Is it worth taking?
Who it's for
- Mycologists working on the taxonomy of the genus Schizophyllum
- Clinical microbiologists distinguishing rare fungal infections
Not for
- Inhaling spores is not advisable, especially for people with weakened immunity or chronic lung disease
- There is no safe oral form
Evidence
Worth knowing
In a 2016 study, 22 of 23 clinical isolates in the US, previously identified as S. commune, turned out to belong to S. radiatum.
Studies
Schizophyllum radiatum, an Emerging Fungus from Human Respiratory Tract
Early-stage evidenceSiqueira JPZ, Sutton DA, Gené J, et al. · Journal of Clinical Microbiology · 2016
A phylogenetic analysis of 23 clinical isolates showed that 22 of them, previously classified as S. commune, belonged to S. radiatum.
View studySchizophyllum radiatum: An uncommon culprit of invasive fungal rhinosinusitis in an immunocompetent patient
Research hypothesisGeorge A, Jose R, Valsan C, et al. · Medical Mycology Case Reports · 2025
A case report of invasive fungal sinusitis caused by S. radiatum, confirmed by sequencing.
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
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
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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.