Does Lion's Mane help cognition? (Grade C evidence)
Explore current source-reported research for this exact question. These records are separate from the synthesis below; they do not update its grade or establish a recommendation.
Lion's Mane shows a Grade C benefit for cognition: the recorded evidence, especially in adults suggests a modest effect, low certainty. Dose range ~1 g/day.
Exact question reviewed
- Population
- adults
- Intervention
- Lion's Mane · ~1 g/day
- Comparator
- not reported
- Outcome
- cognition
- Time horizon
- not reported
Bottom line. Lion's Mane shows a Grade C benefit for cognition: the recorded evidence, especially in adults suggests a modest effect, low certainty. Dose range ~1 g/day. [1 other]
- Direction
- benefit
- Magnitude
- early, small studies suggest a modest cognitive effect
- Grade
- C
- Certainty
- low
- Clinical meaning
- small but potentially useful
- Who it applies to
- adults
- Dose / form studied
- ~1 g/day
- Safety
- not assessed
- The one limitation
- Claim-specific limitation details are not available in this public record.
Reviewed not reported · Evidence last changed · Open evidence record (version 0)
Grade C / low: hints of benefit in small trials; a well-run RCT could easily push this to B or to null.
Who it works for
Best-studied in adults. Recorded studied dose: ~1 g/day.
Evidence
| Study | Design | Role | Cite |
|---|---|---|---|
| Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial | peer-reviewed | not classified | PMID:18844328 · DOI |
Why this grade
Reasoning trace
The current record stores Grade C at low certainty and links 1 publishable source. A claim-specific domain-by-domain grading rationale is not available in this public record, so no reason for upgrading or downgrading is inferred here.
Audit and version
- Claim ID
- ec_lions_cog
- Claim version
- not reported
- Governance
- legacy, not verified
- Clinician review
- Not yet reviewed by a licensed clinician
- Last evidence search
- not reported
- Last editorial review
- not verified
Dose & form
Studied intake: ~1 g/day.
People say · Evidence shows
“Lion's mane regrows brain cells”
Evidence: Grade C — early, small studies suggest a modest cognitive effect.
How it stacks up for cognition
- Lion's Mane vs Creatine for cognition — Creatine Grade B
- Lion's Mane vs Caffeine for cognition — Caffeine Grade A
- Lion's Mane vs Ginkgo for cognition — Ginkgo Grade C
- Lion's Mane vs L-Theanine for cognition — L-Theanine Grade C
- Lion's Mane vs Iron for cognition — Iron Grade C
- Lion's Mane vs Ashwagandha for cognition — Ashwagandha Grade C
- All interventions graded for cognition →
Grade history
- C → CCorrection by Claude (gold-standard provenance sweep): live Postgres source drift replaced with the verified seed source set [pmid:18844328] details →
Re-review cadence: every 6 months (Grade C+) · methodology v1.
Frequently asked
How long does Lion's Mane take to work for cognition?
This record does not report a studied onset time for Lion's Mane and cognition. Do not assume a typical timeframe.
What dose was used in studies of Lion's Mane for cognition?
The recorded studied dose for Lion's Mane and cognition is ~1 g/day. This is a source detail, not a dose recommendation.
Does Lion's Mane work for cognition if I'm not deficient?
The recorded studied population is adults. This field alone does not show whether deficiency or baseline status changes the effect.
Lion's Mane or the next-best alternative for cognition?
See the compare block above for the head-to-head with the most-cited alternative. Grade + certainty differences matter more than any single trial.
Related
What this is — and is not
- Evidence description
- early, small studies suggest a modest cognitive effect
- Substrate's interpretation
- The current reviewed record assigns Grade C at low certainty. A domain-by-domain rationale is shown only when recorded.
- Discuss with a clinician
- If you're on medication or have a condition that changes the calculus, bring the interaction & population blocks above to your pharmacist or prescriber before deciding.
- Individualized medical advice
- Not provided here or on any Substrate surface (API, agent tool, embed) — see YMYL policy.
Cite this page
Citation is encouraged. The proposed reuse license is CC-BY-4.0; status: pending-governance-ratification.
Plain-text citation
Substrate. Does Lion's Mane help cognition? (Grade C). https://evidencebased.info/interventions/lions-mane/cognition. Updated 2026-07-16.
BibTeX
@misc{substrate_nslionsmanecognition,
author = {Substrate editorial},
title = {Does Lion's Mane help cognition?},
year = {2026},
url = {https://evidencebased.info/interventions/lions-mane/cognition},
note = {Grade C, evidencebased.info}
}Found something wrong on this page? Report an error →
Current source-reported research
Membership uses admitted intervention and measured-outcome associations for this exact question. Different populations, preparations, comparators and timepoints remain separate. No pooling or update to the synthesis is asserted.