Turkey Tail Mushroom

Also known as: Trametes versicolor · Coriolus versicolor · PSK (Krestin) · PSP

●●○Moderate Evidence

The best-evidenced medicinal mushroom for immune support. PSK (polysaccharide-K) is used as an FDA-approved adjunct to chemotherapy in Japan. Strong gut microbiome prebiotic effects.

Effective Dose

1–3g / day

per clinical evidence

Evidence Level

Moderate

Medicinal Mushrooms

Mechanism

PSK and PSP beta-glucan immune potentiation

primary action

Best For

Immune function

Gut microbiome, Cancer support, Antioxidant

This profile is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any supplementation, especially if you have pre-existing conditions or take medications.

What Is Turkey Tail Mushroom?

Turkey tail is the most extensively studied medicinal mushroom in human clinical trials, primarily due to PSK (Krestin) — a beta-glucan extract approved in Japan as an adjunct to cancer treatment. It modulates both innate and adaptive immunity and has documented prebiotic effects on gut microbiota composition.

How It Works: The Science

PSK and PSP (polysaccharide peptide) are the two primary beta-glucan fractions. They activate macrophages, NK cells, and T-lymphocytes via toll-like receptor (TLR-2, TLR-4) and Dectin-1 signalling. PSP specifically supports Lactobacillus and Bifidobacterium growth in the gut while inhibiting Clostridium and E. coli.

Primary Mechanism

PSK and PSP beta-glucan immune potentiation

Evidence-Based Benefits

Enhances immune function in cancer patients receiving chemotherapy

strong

Lu et al. (2011) — FDA Phase I trial confirmed immune enhancement; approved in Japan (PSK/Krestin)

Improves gut microbiome diversity as a prebiotic

moderate

Pallav et al. (2014) — significant beneficial shifts in gut microbiome composition

Improves NK cell activity in healthy adults

moderate

Twardowski et al. (2015) — significant NK cell and CD8+ T cell improvement

Dosage Guide

Effective Dose

1–3g / day

1–3g/day of whole mushroom powder (hot water extracted) or standardised PSK/PSP extract. Best taken consistently for weeks to months for immune benefits.

Safety Profile & Side Effects

Excellent safety profile — decades of human use in Japan. May potentiate chemotherapy effects — inform your oncologist if used alongside cancer treatment.

Who Should (and Shouldn't) Take It

Best for

Immune functionGut microbiomeCancer supportAntioxidant

Who it's for

Broadly recommended as a daily immune supplement. Particularly valuable for those undergoing cancer treatment (with medical supervision), those with frequent infections, and anyone wanting gut microbiome support.

Frequently Asked Questions

What is the recommended dose of Turkey Tail Mushroom?

1–3g/day of whole mushroom powder (hot water extracted) or standardised PSK/PSP extract. Best taken consistently for weeks to months for immune benefits.

Is Turkey Tail Mushroom safe?

Excellent safety profile — decades of human use in Japan. May potentiate chemotherapy effects — inform your oncologist if used alongside cancer treatment.

How does Turkey Tail Mushroom work?

Who should take Turkey Tail Mushroom?

Related Ingredients

Reishi Mushroom Lion's Mane Mushroom Probiotics (Lactobacillus / Bifidobacterium)Beta-Glucan (Oat / Yeast)

Medical Disclaimer

Ingredient profiles are for informational purposes only and do not constitute medical advice. Consult a qualified healthcare professional before starting any supplementation, especially if you have pre-existing conditions or take medications. Full disclaimer →