
About
Laricifomes officinalis, commonly known as Agarikon, is a rare, long-lived medicinal polypore fungus historically revered as a sacred remedy by ancient civilizations. Native to old-growth conifer forests in North America and Europe, particularly those of western North America, Agarikon is known for its potent antiviral, antibacterial, and anti-inflammatory properties, and for producing fruiting bodies that can live for decades.
History
Revered in Ancient Greek medicine, Agarikon was referred to as the “elixir of long life” by Dioscorides in the first century AD. Traditionally used to treat tuberculosis, asthma, coughs, and infections, it was also used by indigenous North American tribes for lung conditions and spiritual purposes.
Today, it is at the forefront of mycological research, especially in studies on novel compounds with antiviral effects, including those against orthopoxviruses, herpes viruses, and even influenza strains.
Overview
The fruiting body of L. officinalis is large, beehive- or hoof-shaped, chalky white to yellowish, and grows high on the trunks of old conifer trees such as larch, Douglas fir, and hemlock. It is a perennial fungus that may persist for decades on a single tree.
Agarikon contains bioactive compounds like agaric acid, lauric acid, and fumarprotocetraric acid, which contribute to its strong antimicrobial and immune-enhancing effects. It is not edible due to its woody texture but is widely used in tinctures, capsules, and extracts in herbal and functional medicine.
Flavors
Bitter
Agarikon is often described as having a bitter taste, which is one of the reasons it's not typically used in culinary dishes.
Textures
Woody
Agarikon has a woody texture.
Cork-Like
Agarikon has a cork-like texture.
Fragrances
Earthy
Agarikon has a natural earthy aroma.
Resinous
Agarikon has a resinous aroma.
Physical Characteristics
Caps:
Up to 60 cm diameter, brown to reddish brown, resinous
Gills:
Grayish white pores, 5-7 per mm
Helps With
Immune System
Stimulates cytokine production and enhances natural killer cell activity
Viral Suppression
Contains antiviral triterpenoids effective against DNA and RNA viruses
Bacterial Suppression
L. officinalis extracts have shown antibacterial activity against common pathogens
Medicinal Chemistry
Similar Species

Species: Fomitopsis officinalis
Edibility: unknown
Key Differences: Grows on trees other than larch. Smaller fruiting body.

Species: Fomitopsis officinalis
Edibility: unknown
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References
Medicinal Polypores of the Forests of North America: Screening for Novel Antiviral Activity
Polypore mushrooms have been used medicinally for thousands of years. The Greek physician Dioscorides first described the use of a wood conk, Agarikon, now known as Fomitopsis officinalis (Vill.: Fr.) Bond. et Singer (= Laricifomes officinalis), as a treatment against consumption in 65 AD. Other wood conks, such as Ling Chi or Reishi, have had a similarly long history of use in Asia.
2005