Agaricus blazei
Useful mainly for people interested in a beta-glucan immune mushroom, with realistic expectations.
Quick decision guide
May help most
people interested in a beta-glucan immune mushroom, with realistic expectations
Common dosing range
1,500–3,000 mg/day dried powder or 400–800 mg/day standardized extract
When to expect effects
Weeks (uncertain)
Watch out for
Rare hepatotoxicity reported with concentrated extracts; avoid with immunosuppressants
What is it
Agaricus blazei (Royal Sun mushroom, also known as A. subrufescens) is an edible Brazilian mushroom used as a traditional immune tonic and a source of bioactive beta-glucans.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
immune support Limited Evidence | Unclear | generally healthy adults curious about beta-glucan immune effects | Weeks |
cancer-care adjunct (quality of life) Mixed Evidence | Unclear / inconsistent | oncology patients only under specialist supervision | Unclear |
immune support
- Effect
- Unclear
- Best fit
- generally healthy adults curious about beta-glucan immune effects
- Time
- Weeks
cancer-care adjunct (quality of life)
- Effect
- Unclear / inconsistent
- Best fit
- oncology patients only under specialist supervision
- Time
- Unclear
Evidence for 2 uses
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
immune support
Mechanism onlyAgaricus blazei beta-glucans engage dectin-1 and related receptors and stimulate macrophage and NK-cell activity in lab and animal models. Human data are limited and largely measure immune-cell or cytokine markers rather than clinical outcomes like fewer infections. Any immune effect in people remains a biomarker-level signal.
Bottom line: There is a plausible immune-stimulating mechanism, but human evidence is limited to biomarkers, not clinical benefit.
cancer-care adjunct (quality of life)
Disease adjunctA few small, exploratory trials have tested Agaricus blazei as a supportive adjunct during cancer treatment, looking at quality of life and immune parameters, with inconsistent results. Rare hepatotoxicity has been reported in this setting with concentrated extracts. Evidence is too weak and conflicting to support routine use.
Bottom line: Use only under oncology supervision if at all; supportive-care evidence is weak and mixed, with a rare liver-injury signal.
Evidence is mixed
Small trials report varied effects on quality of life and immune markers, and concentrated extracts carry rare reports of liver injury.
How it works
How to take it
What to track
3 commercial forms
Compare the main delivery options and what they’re best suited for.
Hot-water fruiting body extract
Most studied form.
Hot-water extraction concentrates beta-glucans.
Mycelium on grain biomass
Used in some blends.
Often lower beta-glucan content than concentrated fruiting body extracts.
Freeze-dried whole mushroom powder
Used as a whole-food form.
Less concentrated than standardized extracts.
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Serious risks
Rare hepatotoxicity (reported with concentrated extracts in cancer patients)
Who should avoid it
- Organ transplant recipients
- People with autoimmune disease on immunosuppressants
- Those with liver disease (caution)
- Pregnant or breastfeeding women (insufficient data)
Pregnancy & breastfeeding
Avoid due to insufficient safety data.
Interactions
Immune-stimulating activity may oppose immunosuppression
Possible CYP effects suggested by limited data
Food sources
| Food | Amount | %DV |
|---|---|---|
| Cooked Agaricus blazei mushroom | rarely available fresh outside producing regions | — |
Cooked Agaricus blazei mushroom
- Amount
- rarely available fresh outside producing regions
- %DV
- —
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
Frequently asked questions
How is this different from button mushrooms?⌄
Button mushrooms are Agaricus bisporus, a different species. A. blazei is the medicinal species studied for immune effects.
Is it safe with chemotherapy?⌄
Some patients use it during cancer treatment, but evidence is weak and case reports of liver injury exist. Always discuss with your oncology team.
References by claim
Track Agaricus blazei with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.