Source: Examine.com — Huperzine A — 50–200 mcg 1–2×/day; cycled due to its long-acting AChE inhibition.
A potent plant alkaloid that blocks the enzyme which breaks down acetylcholine.
Inhibits acetylcholinesterase, so acetylcholine lingers longer.
Potent and long-acting — cycle it (e.g., not daily). Can cause GI upset, cramps, vivid dreams. Don't combine with certain Alzheimer's drugs without medical advice.
| Per serving | |
|---|---|
| Typical branded single-ingredient product | $0.50 |
| Bulk powder at the clinical dose (10g 1%, $30.97) | $0.06 |
Buying bulk powder instead of a branded bottle saves about 88% per serving.
Bulk price: $30.97/10g → Alt source: $12.99/5gEducational only — not medical advice. Grades and clinical doses are computed from public labels against sourced research (citations on the main site); prices last verified 2026-07-21. Expensive Powder has no sponsors; bulk links may earn an affiliate commission, which never affects a grade. Talk to a clinician before starting any supplement.