Medicinal Mushroom
Lion's Mane
Moderate EvidenceHuman trials are small and short, and the NGF mechanism is largely preclinical; a 2025 systematic review finds the benefit signal real but the evidence base thin, which is why this is not rated Strong.
Recommended Dose
500–1000 mg fruiting body extract daily
Timing
Morning with food
Mechanism of Action
Stimulates nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) production via hericenones and erinacines, promoting neurogenesis and myelination in the hippocampus.
Side Effects & Safety
Generally well-tolerated. Rare reports of mild GI discomfort or skin itchiness in those with mushroom allergies.
Do not use / talk to a doctor first
- Known mushroom allergy - the reaction is to the fungus itself, so a reaction to other mushrooms is a genuine reason for caution
- Asthma, where inhaled fungal material is a recognised trigger, if handling the raw powder
Interactions
No established drug interactions
None has been demonstrated in humans. A theoretical antiplatelet effect circulates online but has not been shown clinically; absence of evidence here means untested, not proven safe alongside anticoagulants
Source: Menon 2025, Front Nutr (PMID 40959699)
Pregnancy & breastfeeding
Not adequately studied in pregnancy or breastfeeding. Not recommended without medical advice.
Who should avoid / see a doctor
Anyone with a mushroom allergy. Otherwise the safety record is reassuring as far as it goes: NIH's LiverTox has not linked Lion's Mane to serum enzyme elevations or clinically apparent liver injury, and reported adverse effects in trials are limited to abdominal discomfort and diarrhoea. The limit is trial size and duration, not a known hazard.
Synergies
Used in These Stacks
See Lion's Mane inside a full protocol — the stack pages cover when and why to combine it.
Best Products
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References
- 1.Menon 2025, Frontiers in Nutrition — Systematic review of Hericium erinaceus as a supplement: adverse effects reported in studies were mild and limited to abdominal discomfort and diarrhoea. (systematic review)
- 2.LiverTox, National Institute of Diabetes and Digestive and Kidney Diseases — Lion's Mane has not been linked to serum enzyme elevations during therapy nor to episodes of clinically apparent liver injury. (authoritative body)
- 3.Toxicological assessment, PMC12603391 — Toxicological assessment of Hericium erinaceus and Trametes versicolor mushroom powders. (toxicology study)
