Coriolus versicolor (PSK/PSP) for Fatigue
Verdict: Insufficient Evidence
Across 3 PubMed studies, the evidence for Coriolus versicolor (PSK/PSP) in Fatigue grades Tier U — unverified / insufficient. Research is still too limited to draw a firm conclusion.
U ⚫ U Unverified Insufficient Evidence
Why this grade7-layer evidence engine
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Scoring transparency
All scores computed by a 7-layer evidence engine — fully auditableRaw score 0.44
D
C
B
A
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← counter-evidence / ineffectiveeffective / strong evidence →
Final grade
U · Insufficient Evidence
Confidence
45%
Conflicting evidence
Evidence level
E1
Cochrane high-quality SR/MA
▸View the full decision path (audit trail)
- compute_raw_score — 加權公式: L2×0.30 + L3×0.25 + L5×0.25 + L11×0.10 + L1×0.10 = 0.44
- tier_from_score — 依分數區間映射至 tier letter
- apply_hec_rules — 高品質 SR/MA 顯示 positive (1 篇 > 0 negative)
- tier_strict_requirement_check — Tier 條件達標,未降階
- detect_disputes — 偵測到 0 個 hard + 0 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status
PubMed studies (3)L2 · primary research & systematic reviews
Coriolus (Trametes) versicolor mushroom to reduce adverse effects from chemotherapy or radiotherapy in people with colorectal cancer
Finding: Fatigue: RR 0.76 (95% CI 0.33–1.78) across 3 studies (n=133); very low certainty, 'uncertain whether there is a difference'.
View on PubMed Polysaccharide K and Coriolus versicolor extracts for lung cancer: a systematic review
Finding: Reports benefits on tumor-related symptoms such as fatigue and anorexia, but notes conflicting results; no pooled p-value for fatigue.
View on PubMed Coriolus Versicolor and Ganoderma Lucidum Related Natural Products as an Adjunct Therapy for Cancers: A Systematic Review and Meta-Analysis of RCTs
Finding: OS HR 0.82 (95% CI 0.72–0.94, p=0.005); QoL/KPS improved mainly for Ganoderma arm; fatigue not separately meta-analyzed for Coriolus.
View on PubMed Regulatory & authoritative positionsL4/L5 · FDA / EMA / NIH ODS / Cochrane / Mayo …
L4a US FDA
Cautious
Turkey tail are known to have anti-cancer, antiviral, antibacterial and antifungal effects as well as immune modulating effects. ... The claims on your website establish that your products are drugs under section 201(g)(1)(B) of the FD&C Act because they were intended for use in the cure, mitigation, treatment, or prevention of disease. source↗
L4b EU EFSA
Against
Commission Implementing Decision of 6 December 2021 (C(2021) 8744 final) terminating the procedure for authorising the placing on the market within the Union of the novel food 'Coriolus versicolor' without updating the Union list of novel foods pursuant to Regulation (EU) 2015/2283. source↗