Nootropic

Huperzine A

Also known as: Huperzia serrata extract

Evidence

Potent acetylcholinesterase inhibitor from Chinese club moss. Increases acetylcholine levels for enhanced memory and focus.

Primary uses

Memory
Focus
Neuroprotection
Learning

How it works

Inhibits acetylcholinesterase
Increases synaptic acetylcholine
NMDA receptor modulation

Dosage

Typical range: 50-200 mcg daily
Timing: Cycling recommended (5 on, 2 off)
With food: Optional
Duration: Cycle to prevent tolerance
Special populations: Cognitive enhancement, students

Forms

Capsules

Safety

Common side effects

Nausea
Diarrhea
Vivid dreams

Contraindications

Epilepsy
Heart conditions
GI obstruction

Evidence notes

Potent cholinesterase inhibitor

Grade B: Some human trials support key claims; further confirmation needed.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.