Turkey Tail, PSK & Immune Defense: Clinical Evidence in Oncology
A research-backed look at Turkey Tail (Trametes versicolor) — one of the most clinically studied medicinal mushrooms. Covers PSK (Krestin) and PSP mechanism of action via TLR2/TLR4, macrophage M1/M2 repolarization, Phase I breast cancer trial outcomes, HPV regression data, and why it's the only mushroom extract approved as an adjunct cancer therapy in Japan.
Source Research Papers
Citations in APA 7 format. All studies were sourced from peer-reviewed journals via Google Scholar.
Torkelson, C. J., Sweet, E., Martzen, M. R., Sasagawa, M., Wenner, C. A., Gay, J., Putiri, A., & Standish, L. J. (2012). Phase 1 clinical trial of Trametes versicolor in women with breast cancer. International Scholarly Research Notices Oncology, 2012, 251235. https://doi.org/10.5402/2012/251235
Lu, H., Yang, Y., Gad, E., Inatsuka, C., Wenner, C. A., Disis, M. L., & Standish, L. J. (2011). Polysaccharide Krestin is a novel TLR2 agonist that mediates inhibition of tumor growth via stimulation of CD8 T cells and NK cells. Clinical Cancer Research, 17(1), 67–76. https://doi.org/10.1158/1078-0432.CCR-10-1763
Saleh, M. H., Rashedi, I., & Keating, A. (2017). Immunomodulatory properties of Coriolus versicolor: The role of polysaccharopeptide. Frontiers in Immunology, 8, 1087. https://doi.org/10.3389/fimmu.2017.01087
Couto, J. S., & Silva, D. P. (2008). Coriolus versicolor supplementation in HPV patients. Proceedings of the 20th European Congress of Obstetrics and Gynaecology.
Michalska, A., Szymanowska, U., Kapusta, I., Żurek, N., Nawrocka, A., Różyło, R., Jarocki, P., & Świeca, M. (2025). Antioxidant, anti-inflammatory, and antiproliferative properties of extracted Turkey tail (Trametes versicolor Lloyd) mushroom components microencapsulated with inulin. Food Chemistry, 495, 146348. https://doi.org/10.1016/j.foodchem.2025.146348
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