People mainly take Lion's Mane for focus, memory, mood. Based on 468 first-hand reports and 4 meta-analyses & systematic reviews in the medical literature. Ranked #153 of 1,974 overall.
Of reports that state an outcome, 44% are positive.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
At least one meta-analysis, or 5+ randomized controlled trials. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: Although commonly unreported, potential side effects of HE include stomach discomfort, headache, and allergic reactions. https://www.crd.york.ac.uk/PROSPERO/view/CRD42024571250.
PubMed 40959699 ↗Conclusion: Better designed trials with holistic measures are needed to investigate the effect of nutritional support on the AD biomarkers, cognitive status, biochemical parameters and functional states. Also, more beneficial results can be obtained by examining the simultaneous effects of nutritional supplements with larger sample groups.
PubMed 35686376 ↗Conclusion: However, challenges remain, such as standardization and lack of clinical validation. Future research should address these gaps, emphasizing personalized interventions and advanced technologies for next-generation antidepressant foods.
PubMed 40289452 ↗Conclusion: muscuria and other mushroom species. Conclusions: Despite presenting the potential use of mushrooms in managing PNIs, the existing approaches need to be subjected to clinical research to accelerate the development of future therapeutics and preventive measures for PNIs.
PubMed 41562932 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
Verbatim quotes, shortened only — each links to the original discussion.
“I didnt really notice much of a difference to be honest.”
“As far as I know the fresh musheoom will be hard to uptake. Its better with a pill. I use one processed from a water extract.”
“thinking about using lion's mane”
“A double-blind, parallel-group, placebo-controlled trial showed improved cognitive ability.[4]... conflict of interest.”
“Lions mane 300mg”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate