Agaricus mushroom

BotanicalBest with a meal

What is it

Agaricus mushroom in supplements typically refers to Agaricus blazei (also A. subrufescens, Royal Sun mushroom), or sometimes Agaricus bisporus (button mushroom), used for immune and adaptogenic support.

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Immune modulation

Limited Evidence

Mechanistic data support innate-immune activation; clinical outcomes are inconsistent and trials small.

Cancer-care quality of life adjunct

Mixed Evidence

Pilot trials show mixed results when added to conventional cancer care.

How it works

Agaricus species contain beta-glucans, proteoglycans, and ergosterol/vitamin D2 precursors. Beta-glucans engage dectin-1 and complement receptors on innate immune cells. Most clinical work on A. blazei extracts is small or exploratory; A. bisporus (button mushroom) is mostly studied as food.

Dosage

Typical doses are 1500-3000 mg of fruiting body powder or 400-800 mg of standardized extract per day for A. blazei.

When and how to take it

Once or twice daily with food. No strict timing.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Fruiting body hot-water extract

Most studied form.

Concentrates beta-glucans.

Whole mushroom powder

Whole-food form.

Lower concentration of actives.

Safety

Generally well tolerated. Rare hepatotoxicity reported in cancer patients with high-dose extracts. Mild GI symptoms occasional.

Who should be cautious

Avoid in organ transplant or immunosuppression. Caution in liver disease. Pregnancy and breastfeeding data are limited.

Interactions

Theoretical caution with immunosuppressive medications.

Food sources

Food	Amount	%DV
Button mushroom (A. bisporus)	common food	—
A. blazei fruiting body	rarely available fresh outside producing regions	—

Button mushroom (A. bisporus)

Amount: common food
%DV: —

A. blazei fruiting body

Amount: rarely available fresh outside producing regions
%DV: —

Frequently asked questions

What is the difference between A. bisporus and A. blazei?⌄

A. bisporus is the everyday button mushroom. A. blazei is a Brazilian medicinal species used as the source for many immune-support extracts.

Will Agaricus boost my immune system?⌄

Lab and small human studies suggest immune modulation through beta-glucans, but clinical effects on real-world infections are not clearly proven.

References

Agaricus mushroom on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Agaricus mushroom (PubMed search) — PubMed link

Track Agaricus mushroom with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

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Evidence-based·How we grade evidence

Disclaimer: 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.