herb · for anxiety
Lions Mane
Its nerve growth effects are meant to settle the brain region that drives the anxiety response.
Say that in clinical terms
NGF-mediated amygdala regulation reduces anxious behavior and stress response reactivity.
How strong is the research?
A 4-week trial in 30 women showed no clear difference from placebo.
1 paper read, 1 against.
Who was studied: Studied in 30 Japanese women with menopausal symptoms.
How much to take
daily
1000–2000 mg
Anxiolytic effects appear within 4 weeks. Well-tolerated long-term.
Before you take it
- No NIH ODS Tolerable Upper Intake Level (UL) has been established for Lion's Mane (Hericium erinaceus); the highest dose tested in a published human RCT was 3 g/day for 16 weeks, and systematic human safety data above this dose or beyond this duration are absent.
- Hericenone B, a compound isolated from H. erinaceus fruiting body, inhibits collagen-induced platelet aggregation in vitro; potential additive bleeding risk with anticoagulants (warfarin, clopidogrel) and antiplatelet agents (aspirin) is mechanistically plausible but has not been studied in human pharmacokinetic or drug-interaction trials.
- Preclinical animal studies demonstrate antihyperglycemic activity; additive hypoglycemia risk when combined with antidiabetic medications (insulin, metformin, sulfonylureas, SGLT2 inhibitors) is mechanistically plausible but unstudied in humans.
- At least one case of allergic hypersensitivity to oral Lion's Mane has been documented; individuals with known mold or fungal allergies should exercise caution.
- Human safety data during pregnancy and lactation are absent from the published literature; standard guidance is to avoid use during these periods unless supervised by a healthcare provider.
- LiverTox classifies Lion's Mane as very unlikely to cause clinically apparent liver injury (Likelihood Score E); no hepatotoxic cases appear in clinical trial records or published case series.
- Long-term human safety data beyond 16 weeks of continuous supplementation are not available in the peer-reviewed literature.
What we make of it
A single question inside a menopause questionnaire, showing a trend rather than a result.
The detail
The study was in Japanese women with menopausal symptoms over four weeks. "Anxious" was one item inside a general complaints questionnaire, it was not what the trial set out to measure, and on its own it did not beat placebo.