15/12/2025
Hi Folks! Interesting reading comparing mushroom mycelium vs mushroom fruit body extracts. 🍄
Repost from Elan Sudberg:
The team behind Alkemist Labs long time friend and client, Paul Stamets / Host Defense just posted a mechanistic paper on Lion’s Mane (Hericium erinaceus) mycelium and how it behaves in human immune cells under stress. Not a mouse, not a marketing deck. Actual PBMCs, transcriptomics, and cytokine readouts.
Two things jumped out at me:
1) Calm under challenge.
When immune cells were hit with an inflammatory LPS challenge, the Lion’s Mane mycelium prep consistently reduced classic stress cytokines like IL-1β, TNF-α, and IL-8, while keeping baseline cytokines low. In other words: modulate, don’t light the place on fire.
2) Tissue type matters. A lot.
They compared the mycelium to a β-glucan-enriched fruiting-body extract. Under the same challenge, the fruiting-body extract nearly doubled IL-1β, while the mycelium drove it down. Same species, different material, different immune outcome. That’s a big deal for anyone who thinks “Lion’s Mane is Lion’s Mane.”
Also notable: the mycelium showed stronger antioxidant and iron-chelating activity than the fruiting-body extract in this setup.
Important disclaimer so nobody gets weird: this is a preprint and still under peer review. But the direction is clear enough to be interesting, and it reinforces something I’ve been saying for years:
You don’t get to assume bioactivity from a species name. You test the actual preparation.
https://www.preprints.org/manuscript/202511.1990
