Powerful memory enhancement
Significantly improves memory formation and recall
Huperzine A
Potent acetylcholinesterase inhibitor derived from Chinese club moss, enhancing acetylcholine levels for memory and neuroprotection
Scientific nameHuperzine A
FormulaC15H18N2O
Molecular weight242.32 g/mol
CAS102518-79-6
80
absorption score
8
safety / 10
25
USD per month
5
documented interactions
Check it against something
Huperzine A with:
- Alpha-GPC
- Amylase
- Ashwagandha
- Avocado Oil
- BCAA (Branched-Chain Amino Acids)
- Beetroot Powder
- Beta-Alanine
- Bifidobacterium lactis
- Bifidobacterium longum
- Bovine Collagen
- Caffeine
- Calcium
- Calcium Bone Formula
- Calcium Carbonate
- Casein Protein
- Chicken Collagen
- Choline (Bitartrate)
- Chondroitin Sulfate
- Coconut Oil
- Collagen Peptides
- Comprehensive Immune Support Complex
- Comprehensive Multivitamin-Mineral Complex
- Creatine HCL
- Creatine Monohydrate
- D-Mannose
- DHA
- Electrolyte Blend
- EPA
- Fish Oil (EPA/DHA)
- Folate (5-MTHF)
- Ginger
- Iron Fumarate
- Iron Sulfate
- Joint Mobility Formula
- Keratin
- Krill Oil
- L-Carnitine
- L-Citrulline
- Lactase
- Lactobacillus acidophilus
- Lactobacillus rhamnosus
- Lipase
- Magnesium Citrate
- Magnesium Glycinate
- Magnesium Oxide
- Marine Collagen
- Melatonin
- Modafinil
- Olive Oil Extract
- Omega-3 + Curcumin + Vitamin D Triple Anti-Inflammatory Formula
- Papain
- Protease
- Saccharomyces boulardii
- Turmeric
- Vitamin B12 (Cyanocobalamin)
- Vitamin B12 (Methylcobalamin)
- Vitamin C (Ascorbic Acid)
- Vitamin C (Sodium Ascorbate)
- Vitamin D3
- Whey Protein
- Zinc Gluconate
Nothing found
78
out of 100
Works better together
Take together — same timing window amplifies the synergy.
What it does
mechanism and evidence for each claimNeuroprotective effects
Protects brain cells from damage and supports healthy aging
Alzheimer's disease support
May slow cognitive decline in Alzheimer's patients
Enhanced learning capacity
Improves ability to learn new information and skills
Improved focus and attention
Enhances concentration and cognitive performance
Others take these for the same thing
Same goal, different mechanism — check any of them against this one
Vitamin B12 (Cyanocobalamin)
Energy & nerve support
250-1000 mcg
A
70%
Fish Oil (EPA/DHA)
Heart & brain health
1-2g EPA/DHA
A
85%
L-Theanine
Calm focus & stress relief
100-400mg
B
90%
Vitamin B8 (Inositol)
Mental health & PCOS support
2-18g (condition dependent)
B
95%
SAM-e
Mood support & liver health
400-800mg
A
70%
Lithium Orotate
Mood & brain support
1-20mg
C
60%
Every pair we checked
12 combinations scored by the engine
Huperzine A + Caffeine
No documented interaction either way
No known interaction
70
Huperzine A + Creatine Monohydrate
No documented interaction either way
No known interaction
70
Huperzine A + Vitamin D3
No documented interaction either way
No known interaction
70
Huperzine A + Calcium Carbonate
No documented interaction either way
No known interaction
70
Huperzine A + Whey Protein
No documented interaction either way
No known interaction
70
Huperzine A + Lactase
No documented interaction either way
No known interaction
70
Huperzine A + Bovine Collagen
No documented interaction either way
No known interaction
70
Huperzine A + DHA
No documented interaction either way
No known interaction
70
Huperzine A + Turmeric
No documented interaction either way
No known interaction
70
Huperzine A + Ginkgo Biloba
Enhanced cognitive function and neuroprotection
Works better together
75
Huperzine A + Alpha-GPC
Enhanced acetylcholine production and activity
Works better together
78
Huperzine A + Phosphatidylserine
Enhanced memory and cognitive function
Works better together
78
Dosage
Daily100-200mcg
Memory enhancement100-200mcg daily
Neuroprotection100-200mcg daily
Alzheimers support200-400mcg daily
Cognitive enhancement100-200mcg daily
When to expect it
First Effects1-2 weeks for cognitive benefits
Peak Benefits4-8 weeks for sustained memory and neuroprotection
Deficiency DevelopmentNot applicable - plant compound
Toxicity OnsetRare, mainly cholinergic side effects with high doses
How to measure it
MarkerAcetylcholinesterase activity (rarely measured)
OptimalAppropriately reduced enzyme activity
Deficient belowNot applicable for plant compound
FrequencyOnly for research purposes - monitor symptoms instead
What people actually reported to the FDA
CAERS, 5 reports naming it as the suspectMost reported effects
Named as the suspect
5 reports
of 6 that mention it at all
Serious outcome
78%
hospitalisation, emergency room or worse
Hospitalization3
Other Outcome1
Visited Emergency Room1
Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →
What actually reaches you
The label counts the carrier, your body does not
Absorption
Very high 80 of 100 · best absorbed form of this compound
Delivered daily
0.1 mg
Cost per 1 mg delivered
$6.94 comparative — uses the absorption score, not a measured percentage
Works better with
+
Alpha Gpc
Enhanced acetylcholine production and activity
Huperzine A preserves while Alpha-GPC increases acetylcholine · level B
+
Phosphatidylserine
Enhanced memory and cognitive function
Both support neural membrane function and memory · level B
+
Ginkgo Biloba
Enhanced cognitive function and neuroprotection
Complementary mechanisms for brain health · level CWhat not to take with Huperzine A
!
Anticholinergic Drugs
May counteract cognitive benefits
Blocks acetylcholine receptors · major significance
!
Alcohol
May interfere with cognitive benefits
Alcohol impairs acetylcholine function · moderate significanceMedication interactions
Discuss these with a pharmacist before combiningMay enhance drug effects and side effects
What to do: Avoid combination - consult doctor
May reduce drug effectiveness
What to do: Monitor drug effectiveness
May enhance cholinergic effects
What to do: Monitor for side effects
Available forms
Huperzine A (standardized extract): Potent memory enhancement, Strong research, Neuroprotective, Long-lasting effects
Food sources
Chinese club moss (Huperzia serrata)
Natural source for extraction · 60
Not found in common foods
Supplementation required · N/A
Standardized extracts only
100-200mcg per capsule · 80
Traditional Chinese medicine preparations
Variable and unstandardized · 40
Too little
- Not applicable (plant compound):
- Symptoms addressed by Huperzine A:
- Poor memory and cognitive decline
- Difficulty learning new information
- Reduced focus and attention
- Age-related cognitive impairment
- Alzheimer's disease symptoms
Too much
- Generally safe but potential cholinergic effects:
- Nausea and digestive upset
- Dizziness and headaches
- Excessive sweating
- Muscle twitching
- Vivid dreams or nightmares
Who benefits most
memory-enhancement
Excellent for improving memory and cognitive performance
100-200mcg daily
alzheimers-dementia
May slow progression of neurodegenerative diseases
200-400mcg daily
aging-neuroprotection
Supports healthy brain aging and prevents cognitive decline
100-200mcg daily
students-learning
Enhances learning capacity and memory formation
100-200mcg daily
cognitive-enhancement
Improves focus, attention, and mental clarity
100-200mcg dailyWhere to buy it
Look for Huperzine A at 100-200mcg per serving. The form that matters here is Huperzine A (standardized extract).
Find on Amazon
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What else affects it
Beyond other supplements
!
Alcohol
May interfere with cognitive benefits
Alcohol impairs acetylcholine functionHow it works
- Potently inhibits acetylcholinesterase enzyme
- Increases acetylcholine levels in brain
- Provides antioxidant and neuroprotective effects
- Supports synaptic plasticity and memory formation
- Protects against glutamate toxicity
- Enhances nerve growth factor production
Key findings
what the evidence supports- Excellent evidence for memory enhancement and cognitive function
- Strong research on Alzheimer's disease and neuroprotection
- Superior to synthetic acetylcholinesterase inhibitors
- Generally safe but requires careful dosing
Sources: NIH Examine.com · data reviewed 2026-08-02
Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →
Common questions
What are the benefits of Huperzine A?
Documented effects: Powerful memory enhancement; Neuroprotective effects; Alzheimer's disease support; Enhanced learning capacity. Significantly improves memory formation and recall
How much Huperzine A should you take per day?
The common daily range is 100-200mcg. By goal — memory enhancement: 100-200mcg daily; neuroprotection: 100-200mcg daily; alzheimers support: 200-400mcg daily; cognitive enhancement: 100-200mcg daily.
When is the best time to take Huperzine A?
Morning with food. First effects are typically reported within 1-2 weeks for cognitive benefits.
What are the side effects of Huperzine A?
At excessive doses: Generally safe but potential cholinergic effects:, Nausea and digestive upset, Dizziness and headaches, Excessive sweating, Muscle twitching. Safety rating at normal doses is 8 out of 10.
What should you not take with Huperzine A?
Separate it from Anticholinergic Drugs, Alcohol by two to four hours. May counteract cognitive benefits
Does Huperzine A interact with medications?
Documented interactions with cholinesterase-inhibitors, anticholinergics, cholinergic-drugs. Discuss these with a pharmacist before combining.
How do you know if you need Huperzine A?
The marker is Acetylcholinesterase activity (rarely measured), optimal range Appropriately reduced enzyme activity. Common deficiency signs: Not applicable (plant compound):, Symptoms addressed by Huperzine A:, Poor memory and cognitive decline, Difficulty learning new information.