The Herbarium
    Photograph of Shiitake (Lentinula edodes)
    The Herbarium / N° 06

    Shiitake

    Lentinula edodes

    Functional mushroom

    The bridge between kitchen and apothecary, a mushroom people have grown with intent for over a thousand years.

    Traditional use

    Shiitake cultivation began in China during the Song dynasty, making it one of the earliest farmed fungi in history. Alongside its culinary fame it has been dried, brewed and taken as a daily vitality tonic across East Asia ever since.

    Provenance, where ours comes from

    Cultivated on hardwood, exactly as it has been since Song-dynasty China, the original intentionally farmed mushroom. Manufactured in the UK.

    What's in it, the compounds researchers look at
    Lentinan
    A beta-glucan isolated from Shiitake in the 1960s.
    Eritadenine
    A compound unique to this species.
    Ergothioneine
    An amino acid found in high levels in mushrooms.
    The form we use

    Hot-water fruiting-body extract from log-grown Shiitake, used for its beta-glucan content rather than flavour.

    What the research has looked at

    One of the best-characterised edible mushrooms in nutrition science, with a long literature on its polysaccharides and sterols.

    Field notes
    • 'Shii' is the Japanese name for the tree it traditionally grows on; 'take' simply means mushroom.
    • Cultivation records date to at least 1209 in China, one of the oldest cultivated crops of any kind.
    • Sun-dry Shiitake gills-up for a few hours and its vitamin D content rises measurably.
    Also known as
    Xiang gu (fragrant mushroom)Black forest mushroom

    Traditional use reflects historical and cultural practice, not licensed health claims. Always read the label and consult a healthcare professional if unsure.