Turkey Tail (PSK/PSP)

Mushroom extract: β-Glucan/DC/NK ↑; strong adjunct OS in gastric/colorectal/breast/lung.

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🏥⭐⭐⭐⭐ Strong — Multiple trials/meta-analyses (especially GI cancers) show immune and OS benefits with PSK adjunct therapy.Trametes versicolorCoriolus versicolorPSKPSP

Forms: PSK extract capsules (1 g, 3x/day) · PSP powder (standardized polysaccharide)

Educational only, not medical advice. OncoForge makes no claim that Turkey Tail (PSK/PSP) treats, prevents, or cures any condition, beyond what the linked studies show. Evidence levels vary; effects may not translate to people, and some compounds can cause harm. Always coordinate with your oncology team.

Key Takeaway

PSK/PSP polysaccharides from Trametes versicolor activate innate/adaptive immunity (DCs, NK/CTL) and have improved survival signals in GI cancers as an adjunct to 5-FU–based therapy.

Evidence at a glance

Tier 4 · clinicalGastricColorectalBreastLung

30+ trials/meta; OS HR 0.75 in gastric (Oba meta); NK ↑30% in pilots; ongoing breast/NSCLC; PDQ-endorsed.

How it may work

β-Glucans engage Dectin-1/CR3 → Syk/NF-κB, maturing DCs and promoting Th1 cytokines (IL-12/IFN-γ). This enhances NK and CD8⁺ cytotoxicity and supports antigen presentation. Clinical trials/meta-analyses in gastric/colorectal cancers report OS benefits with PSK adjunct to chemotherapy.

Targets & pathways

Curated mechanistic targets reported for this agent — how it may act on cells, not proof of a clinical effect.

β-Glucan PRR↑Dectin-1/CR3 activation for immune priming
Dendritic↑Maturation and antigen presentation
NK↑Cytotoxicity enhancement
Th1 Cytokines↑IL-12/IFN-γ production
CTL↑CD8⁺ T-cell support

β-Glucan PRRDendriticNK

Often studied / combined with

Combinations reported in the literature, not a protocol or a recommendation.

5-FU: Prolonged OS in gastric/colorectal meta-analyses.
Curcumin: DC maturation boost in lung models.
Resveratrol: NK co-enhancement in breast cancer.
Quercetin: Th1 amplification in prostate models.

Overlapping mechanisms

β-Glucan PRR: Overlaps maitake/lentinan; select by standardization.
NK ↑: Redundant with reishi; monitor lymphocyte counts.

Safety & interactions

Severity and how well-established each signal is are shown separately. Verify everything with your oncologist or pharmacist — absence here does not mean safe.

Risk categories

Gi UpsetHypersensitivityLiver Monitor

Potential interactions

immunotherapiesMonitorModerateTheoreticalCytokine overlap; potential enhancement.
chemotherapySynergizeLowTheoreticalImmune support with 5-FU.
5-FUSynergizeLowTheoreticalOS benefit in gastric/colorectal.

Timing

With-meal: Improves tolerance.
TID: Divided for steady priming.

References

Research

No published studies for Turkey Tail (PSK/PSP) yet

New studies appear here once they’ve been reviewed. Browse all studies.

Dose: as studied, not a recommendation

These are doses as studied or reported, never a recommendation. The right amount of Turkey Tail (PSK/PSP) depends on you, your other medicines, and your situation; decide it with your oncology team and pharmacist, not from a web page.

Ranges seen in adjunct / practice use: 1–3 g/day (po) divided TID; with meals, Adjunct 3 g/day PSK; trials use 1 g TID; monitor immune markers; long-term safe..

Trials studying Turkey Tail (PSK/PSP)

No actively-recruiting trials matched right now. Recruiting is not the same as proven. Search ClinicalTrials.gov →

Inclusion here is not an endorsement. OncoForge makes no claim beyond what the linked studies show. Discuss anything on this page with your oncology team before acting on it.

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