Reishi Mushroom
Also known as: Ganoderma lucidum, Lingzhi, Reishi, Mannentake
Effective Dosage
No established dose from provided studies
What the Science Says
Reishi mushroom (Ganoderma lucidum) is a medicinal fungus used for centuries in East Asian traditional medicine. Its active compounds — primarily polysaccharides (including beta-glucans) and triterpenes — have shown anti-inflammatory, antioxidant, and immune-modulating effects in animal and lab studies. In a survey of cancer patients using reishi, many reported improvements in fatigue, nausea, and appetite, though this was self-reported data without a control group, not a controlled clinical trial.
What It Doesn't Do
Not proven to treat or prevent cancer in humans. No solid clinical trial evidence it boosts immunity in healthy people. Self-reported symptom improvements in surveys don't prove the mushroom caused those improvements. Not a substitute for conventional medical treatment. Don't assume 'natural' means safe for everyone — it can flare autoimmune conditions.
Evidence-Based Benefits
Reishi polysaccharides and beta-glucans show immunomodulatory and anti-inflammatory activity in animal and in vitro models, including suppression of pro-inflammatory cytokines (TNF-α, IL-6, IL-1β) and reduction of oxidative stress markers (PMID: 38967209, PMID: 38290027, PMID: 37670115). In a mouse model of atopic dermatitis, Reishi polysaccharides modulated gut microbiota, reduced IgE and IL-4 levels, and helped restore skin barrier function (PMID: 41606936). A single small crossover clinical trial in Gulf War Illness patients was conducted, but full efficacy results were not reported in the available abstract (PMID: 33915962).
Weak EvidenceEffective at: No established dose from provided studies
Source: auto-research
Absorption & Bioavailability
Unknown — no pharmacokinetic data in the provided studies. Animal studies used oral and topical (nanogel) forms. Bioavailability of active compounds like polysaccharides and triterpenes in humans is not characterized by the provided research.
Red Flags to Watch For
- People with autoimmune diseases (lupus, psoriasis, rheumatoid arthritis) should use caution — reishi has immunostimulatory properties that may trigger or worsen flares
- Most positive evidence comes from animal studies and self-reported patient surveys, not rigorous human clinical trials
- Commonly used alongside other traditional Chinese herbs, making it hard to isolate reishi's specific effects
- Cost and lack of insurance coverage are major barriers — expensive products may not deliver proven benefits
- Some cancer patients in surveys reported adverse effects — always consult an oncologist before use during cancer treatment
Products Containing Reishi Mushroom
See how Reishi Mushroom is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06