Huperzine A
Chinese club moss extract · Brain
A potent acetylcholinesterase inhibitor from a moss, sold in nootropic stacks at drug-like activity.
What the evidence says
Dementia trials from China report cognitive improvement; no trials in healthy adults.
What studies used
Labels commonly list 50-200 mcg; trials in dementia used 300-400 mcg.. Morning; cycled, per most labels..
Reported from published studies and product labelling — a record of what was used in research, not a recommendation. What is right for you is a conversation with a clinician.
Watch out for
- It is a drug-strength enzyme inhibitor: nausea, cramps, slowed heart rate
- Do not combine with cholinesterase-inhibitor medication
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