Huperzine A (from Huperzia serrata)
Inhibits acetylcholinesterase to raise acetylcholine levels, enhancing memory formation, focus, and learning capacity.
Huperzine A is a naturally occurring compound from Chinese club moss (Huperzia serrata) that has been used in Chinese medicine for centuries. It works by inhibiting acetylcholinesterase, the enzyme that breaks down acetylcholine, thereby increasing levels of this crucial memory and learning neurotransmitter. It's used for cognitive enhancement and is studied for Alzheimer's disease.
Blocks the enzyme that breaks down acetylcholine
Protects neurons from damage
May promote new brain cell growth
How Huperzine A works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
50-200mcg twice daily
Loading: Start with 50mcg to assess tolerance
Can be taken without food
| Form | Type |
|---|---|
| 💊Huperzine A capsules (standardized extract) | Recommended |
| 💊Huperzia serrata extract | Alternative |
Very potent - measured in micrograms (mcg), not milligrams. Ensure accurate dosing.
Minimum: 2 weeks
Optimal: 4 weeks
Cycling: Use for 2-4 weeks, then take 1-2 weeks off to prevent tolerance and receptor downregulation
Note: Due to its long half-life (~10 hours), cycling is recommended to prevent tolerance and accumulation.
Improved memory formation and recall
Better concentration and attention
Faster acquisition of new information
May cause intense dreams
Studied for this population; consult doctor
Additive effects - do not combine
Opposing effects - may reduce effectiveness of either
Tip: Reduce dose; take with food
Tip: Avoid evening dosing
Tip: Reduce dose
Top studies from 39+ peer-reviewed papers
Perng CH et al. • Psychopharmacology (2018)
“The most effective intervention for dementia available is symptomatic treatment for vascular dementia.”
Chan ES et al. • The Cochrane database of systematic reviews (2018)
“We found moderate- to very low-quality evidence of benefit and harm of TCHMs for VaD.”
Laver K et al. • BMJ open (2016)
“Healthcare professionals should ensure that people with dementia are encouraged to exercise and that primary carers are trained and supported to provide safe and effective care for the person with dementia.”
Yang G et al. • PloS one (2013)
“Huperzine A appears to have beneficial effects on improvement of cognitive function, daily living activity, and global clinical assessment in participants with Alzheimer's disease.”
Yue J et al. • The Cochrane database of systematic reviews (2012)
“The currently available evidence is insufficient to assess the potential for huperzine A in the treatment of MCI.”
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