Agarikon Mushroom

Botanical

What is it

Agarikon (Laricifomes officinalis, formerly Fomitopsis officinalis) is a rare wood-decay polypore mushroom native to old-growth conifer forests in the Pacific Northwest and Europe. It has a long traditional use in indigenous and European medicine.

Evidence for 1 use

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

Antiviral / immune support (preclinical)

Mixed Evidence

Laboratory studies show activity against several viruses, but human clinical evidence is absent. Claims should be considered exploratory.

How it works

Agarikon contains agaric acid, polysaccharides, triterpenoids, and lanostanes. Laboratory studies have identified antiviral, antibacterial, and immune-modulating activity. Notable in vitro work has shown activity against several human respiratory viruses, prompting interest in its use during cold and flu season. Human clinical evidence is essentially absent. Most claims are based on laboratory studies, traditional use, and animal models. Sustainability is a major concern: wild agarikon populations are limited.

Dosage

No established RDA. Typical supplement products use 500-1000 mg of mycelium-on-grain or fruiting body extract per day. Follow product labeling.

When and how to take it

WHEN: Once or twice daily. HOW: With water and food.

2 commercial forms

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

Mycelium-on-grain extract

Most common commercial form due to cultivation advantages.

Variable polysaccharide content depending on substrate.

Wild fruiting body extract

Less common due to limited wild populations.

Higher triterpene content; sustainability concerns.

Safety

Generally well tolerated. Side effects are uncommon at supplement doses; mild GI upset is most reported. Long-term safety data in humans are limited.

Who should be cautious

Avoid or use cautiously with autoimmune disease, immunosuppressant medications, organ transplant, pregnancy, and breastfeeding. Choose sustainably sourced products.

Interactions

Limited interaction data. Theoretical immune-modulating effects could interact with immunosuppressants.

Frequently asked questions

Does agarikon kill viruses?⌄

Some viruses are inhibited by agarikon extracts in laboratory studies, but whether this translates to clinical antiviral effects in humans is unknown.

Is agarikon endangered?⌄

Wild agarikon populations are limited and slow-growing. Conscientious sourcing is important; choose cultivated mycelium products when possible.

References

Agarikon Mushroom on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Agarikon Mushroom (PubMed search) — PubMed link

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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.