Best huperzine A supplement
James BevanUpdated Oct 28, 2026
Huperzine A is a compound from a club moss sold for memory, and it comes as a tiny 200 mcg capsule. But does the capsule hold the amount on the label, and does it do anything for a memory that's fine? To find out, we've checked every huperzine A supplement we've audited against the studies, worked out what each costs a day, and picked the one we'd buy.
Quick verdict
Our scientific audit
Buyer rating
Horbäach Huperzine A 400 mcg
The one we'd buy. Two capsules a day, as the label says, give the trials' 400 mcg for 23 cents a day.
- Price per day$0.23
- Capsules a day2
- Dose per capsule0.2 mg
- FormHuperzia serrata whole herb extract
- Capsules per bottle180
- Against the studiesWithin range
Runner-up
Life Extension Huperzine A 200 mcg$0.98 a day
How we rated these We audited nine brain supplements and seven single capsules from their labels and published lab reports, weighting dose fit at 40%, evidence 30%, transparency 20% and testing 10%. Every price is a US price. Audited Oct 23, 2026 How we audit We may earn a commission from links on this page, at no extra cost to you. How we make money
In this guide
What our audit found
We checked every huperzine A capsule and stack we've audited, and these are the five things that matter most if you're choosing one.
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Look for a lab report that measures the huperzine A
A 2020 study of 22 US products that listed huperzine A, most of them brain blends, found only two within 10% of the label, and many held stimulants the label didn't list.9 Nootropics Depot's lot report measured 220 mcg in a 200 mcg capsule, from a lab the brand set up.1112 Double Wood's independent report says its tablet conforms without printing a figure, and the maker's own sheet measured 187 mcg.1415 Horbäach, Life Extension, Nutricost, Source Naturals and Swanson publish no report.2116171819
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Most labels stop at half the studied amount
All seven singles we audited are labeled 200 mcg a capsule or tablet, and the Alzheimer's trials that found gains gave 400 mcg a day.1012 Five of those seven labels say one a day, so they stop at half. Life Extension's label says one capsule up to four times a day, and Horbäach's serving is two capsules, so both reach 400 mcg.1621
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The trials gave 400 mcg a day, which Xu 1995 split in two
Xu 1995 gave 200 mcg twice a day, and Zhang 2002 gave 400 mcg a day.12 In the US trial, 200 mcg twice a day missed its main measure and 400 mcg twice a day did better on some secondary ones.3 We check labels against 400 mcg a day.
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The gains were in Alzheimer's, not in a healthy memory
Most of the trials that found gains were small Chinese studies in people with Alzheimer's, which a 2013 review rated mostly at high risk of bias, and one was in Chinese students who complained of poor memory.1274 The one US Alzheimer's trial missed its main measure, and two single-dose trials in healthy US adults found nothing.356
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If your stack has huperzine A, check the amount
Alpha Brain and Brainol give 400 mcg. Transparent Labs Cognition gives 300 mcg, NeuroQ and Alpha Brain Black Label 200, Brain & Body Power and Genius Consciousness 100, and BrainPill 50. Neuro-Peak prints 0.5 mg of the plant extract without the huperzine A in it.
Best huperzine A supplements
Horbäach's serving is two capsules with 400 mcg between them, the trials' daily amount, for 23 cents a day, and it's the one we'd choose, though it publishes no lab report. Life Extension's capsule holds 200 mcg, and its label says one up to four times a day, so two reach 400 mcg for 98 cents, also with no report. Nootropics Depot's lot report measured 220 mcg in a 200 mcg capsule, from a lab the brand founded, but its label says one a day, half the trials' amount.
Horbäach Huperzine A 400 mcg
Horbäach
400 mcg in a two-capsule serving, from Huperzia serrata extract, for 23 cents a day. The page says it's lab tested but links no report.
- 0.4 mg a day
- 2 capsules, $0.23 a day
- Testing
- None published
- Refund
- 30 days, full refund
- Capsule
- Gelatin
- Dose fit 40%Dose fit 100
- Evidence 30%Evidence 70
Huperzine A's evidence grade is moderate.
- Transparency 20%Transparency 95
Dose printed in full. Five points come off because we read the label online, not on a bottle we bought.
- Testing 10%Testing 0
No lab report is published.
- horbaach.com direct
- Listed price
- $20.79
- Per serving
- $0.23
- Status
- In stock
Life Extension Huperzine A 200 mcg
Life Extension
200 mcg a capsule, and the label says one up to four times a day, so two give 400 mcg for 98 cents. It publishes no lab report.
- 0.4 mg a day
- 2 capsules, $0.98 a day
- Testing
- None published
- Refund
- 365 days
- Capsule
- Vegetarian capsule
- Dose fit 40%Dose fit 100
- Evidence 30%Evidence 70
Huperzine A's evidence grade is moderate.
- Transparency 20%Transparency 95
Dose printed in full. Five points come off because we read the label online, not on a bottle we bought.
- Testing 10%Testing 0
No lab report is published.
- lifeextension.com direct
- Listed price
- $29.25
- Per serving
- $0.49
- Status
- In stock, one-time purchase
Nootropics Depot Huperzine A
Nootropics Depot
Labeled 200 mcg a capsule, for 21 cents, and the label says one a day, half the trials' 400 mcg. The latest lot report measured 220 mcg a capsule by HPLC, from a lab the brand set up.
- 0.2 mg a day
- 1 capsule, $0.21 a day
- Testing
- A lot report with the huperzine A measured, from a lab the brand founded
- Refund
- Unopened bottles only, within 30 days of delivery
- Capsule
- Vegetable cellulose
- Dose fit 40%Dose fit 50
One capsule, the most the label says to take, gives half the 400 mcg a day the trials used.
- Evidence 30%Evidence 35
Huperzine A's grade is moderate, credited at half because the label's one capsule gives half the studied amount.
- Transparency 20%Transparency 95
Dose printed in full. Five points come off because we read the label online, not on a bottle we bought.
- Testing 10%Testing 100
- nootropicsdepot.com direct
- Listed price
- $24.99
- Per serving
- $0.21
- Status
- In stock
We also audited four other huperzine A capsules and tablets and don't recommend them as picks, because each label stops at one 200 mcg serving a day, half the studied amount, and only Double Wood publishes an independent report. Double Wood scores 5.7 out of 10, Nutricost 5.0, Source Naturals 5.0 and Swanson 5.0.13171819
Huperzine A in brain supplements
The table ranks the brain supplements we've audited that contain huperzine A by audit rating, with the amount each one prints and what the formula costs for 400 mcg of huperzine A.
Brain supplements we've audited that contain huperzine A
From Huperzia serrata leaf
$2.22 of the stack per 0.4 mg of huperzine A
20 mg of a 1% Huperzia serrata extract
$12.50 of the stack per 0.4 mg of huperzine A
From Huperzia serrata whole-herb extract
$5.33 of the stack per 0.4 mg of huperzine A
10 mg of a 1% Huperzia serrata extract
$10.13 of the stack per 0.4 mg of huperzine A
5 mg of a 1% Huperzia serrata extract
$18.65 of the stack per 0.4 mg of huperzine A
Printed as Huperzine serrata 0.5 mg, huperzine A content not stated, 0.5 mg is the plant extract's weight, and the huperzine A in it isn't printed
Not comparable
From Huperzia serrata aerial extract
$14.66 of the stack per 0.4 mg of huperzine A
From toothed clubmoss, 1% huperzine A
$1.78 of the stack per 0.4 mg of huperzine A
Huperzine A
$2.00 of the stack per 0.4 mg of huperzine A
The cost column scales each formula's full daily price to 400 mcg of huperzine A, which can be more than a serving holds, so it isn't a dose to take or what the huperzine A alone costs.
If huperzine A is why you're buying, two Horbäach capsules give the trials' 400 mcg for 23 cents a day, and two Life Extension capsules cost 98 cents, though neither publishes a lab report.2116 Nootropics Depot's does, but its label stops at one 200 mcg capsule a day.1011
Is huperzine A worth buying, and who it suits
We wouldn't buy huperzine A for a healthy memory. The trials that found gains were mostly small Chinese studies in people with Alzheimer's, the one US trial missed its main measure, and healthy adults showed nothing.12356
Rafii 2011 gave 210 adults with mild to moderate Alzheimer's 200 or 400 mcg twice a day for 16 weeks. The lower dose did no better than placebo on the ADAS-Cog scale, the trial's main measure, and the higher one did better on some secondary measures.3 It's the only placebo-controlled Alzheimer's trial we found from outside China.
The one positive trial in young people, Sun 1999, gave 100 mcg twice a day to Chinese students who complained of poor memory, and their memory scores rose against placebo.4 Nootropics Expert's page, published in October 2025, says huperzine A works "at any age", but the two trials in healthy adults found no gain.2056
Huperzine A comes from a club moss, as Life Extension's label puts it, and slows the enzyme that breaks down acetylcholine, which is why it was tested in Alzheimer's.1657
It doesn't suit you as a memory supplement when your memory is fine. If you've decided to try it, look for a label whose recommended amount reaches the trials' 400 mcg a day. Horbäach's two-capsule serving gives it, and Life Extension's one capsule up to four times a day covers it, though neither publishes a lab report to show the capsules hold what they say.
Swanson's label cautions against using it with cholinesterase inhibitors such as donepezil, and Source Naturals' warning adds other drugs that act on acetylcholine.1918 In the US trial, 11% stopped because of side effects, mostly nausea, and a 2013 review found slow heart rate reported in two of its 20 trials.37 If you take a prescription medicine, ask your doctor or pharmacist before you try it.
How much to take, and when
Here's what the trials gave, and how it maps onto capsules.
- Study dose benchmark
- 0.4 mg a day
- Doses in the adult trials with a benefit
- 0.4 mg to 0.8 mg a day
- Dose in the trials that found a benefit
- 400 mcg a day in the Alzheimer's trials, split twice a day in Xu 1995, and 200 mcg a day in one trial of students
- Length of those trials
- 8 to 12 weeks, and 4 weeks in one trial of students
The Alzheimer's trials that found gains gave 400 mcg a day, which Xu 1995 split into 200 mcg twice a day, and that's the amount we check labels against.12 Rafii 2011 also tested 800 mcg a day, and the student trial gave 200 mcg a day.34
Horbäach's two-capsule serving gives 400 mcg, and Life Extension's label says one 200 mcg capsule up to four times a day, so two match what Xu 1995 gave as 200 mcg twice a day.2116 The other singles we audited stop at one 200 mcg serving a day.
Many guides tell you to cycle it, five days on and two off or a few weeks on and one off, but none we read cites a trial for that. The trials gave it every day for 4 to 16 weeks.1234
What the trials found
Huperzine A's controlled trials are mostly small and from China, and the few run elsewhere found little.
ModerateChinese trials in Alzheimer's found gains at 400 mcg a day, but the one US trial missed its main measure. In healthy adults, two single-dose trials found nothing.
In Alzheimer's, the Chinese trials found gains and the US trial didn't on its main measure.123
| Study | Who took part | Dose and length | What happened |
|---|---|---|---|
| Xu 19951Randomized, double-blind, placebo-controlled, 8 weeks, several centers in China | 103 people with Alzheimer's | 200 mcg twice a day | Showed a benefit58% improved against 36% on placebo, across memory, thinking and behavior scales. |
| Zhang 20022Randomized, double-blind, placebo-controlled, 12 weeks, 15 centers in China | 202 people with mild to moderate Alzheimer's | 400 mcg a day | Showed a benefit56% gained 4 or more points on the ADAS-Cog scale against 12.5% on placebo. |
| Rafii 20113Randomized, double-blind, placebo-controlled, 16 weeks, US | 210 adults aged 50 and over with mild to moderate Alzheimer's | 200 or 400 mcg twice a day | No clear benefitThe main ADAS-Cog result at 200 mcg twice a day didn't differ from placebo. The higher dose did better on some secondary measures. 11% stopped because of side effects, mostly nausea. |
- Xu 19951Showed a benefit
Randomized, double-blind, placebo-controlled, 8 weeks, several centers in China
103 people with Alzheimer's
200 mcg twice a day
58% improved against 36% on placebo, across memory, thinking and behavior scales.
- Zhang 20022Showed a benefit
Randomized, double-blind, placebo-controlled, 12 weeks, 15 centers in China
202 people with mild to moderate Alzheimer's
400 mcg a day
56% gained 4 or more points on the ADAS-Cog scale against 12.5% on placebo.
- Rafii 20113No clear benefit
Randomized, double-blind, placebo-controlled, 16 weeks, US
210 adults aged 50 and over with mild to moderate Alzheimer's
200 or 400 mcg twice a day
The main ADAS-Cog result at 200 mcg twice a day didn't differ from placebo. The higher dose did better on some secondary measures. 11% stopped because of side effects, mostly nausea.
In younger people without dementia, the one positive trial was in students who said their memory was poor, and the two trials in healthy adults found nothing.456
| Study | Who took part | Dose and length | What happened |
|---|---|---|---|
| Sun 19994Double-blind, placebo-controlled, matched pairs, 4 weeks, China | 68 secondary school students who complained of poor memory | 100 mcg twice a day | Showed a benefitMemory scores of 115 against 104 in the placebo group. |
| Morasch 20155Placebo-controlled, single doses, US | Healthy young adults, 12 in each group | One dose of 100 or 200 mcg | No clear benefitNo gain on any test, apart from recall holding steady across sessions. The authors blamed a ceiling effect. |
| Wessinger 20216Randomized, double-blind, placebo-controlled crossover, single dose, US | 15 exercise-trained adults around 30 | One dose of 200 mcg | No clear benefitNo effect on the thinking tests, and exercise felt harder than on placebo. |
- Sun 19994Showed a benefit
Double-blind, placebo-controlled, matched pairs, 4 weeks, China
68 secondary school students who complained of poor memory
100 mcg twice a day
Memory scores of 115 against 104 in the placebo group.
- Morasch 20155No clear benefit
Placebo-controlled, single doses, US
Healthy young adults, 12 in each group
One dose of 100 or 200 mcg
No gain on any test, apart from recall holding steady across sessions. The authors blamed a ceiling effect.
- Wessinger 20216No clear benefit
Randomized, double-blind, placebo-controlled crossover, single dose, US
15 exercise-trained adults around 30
One dose of 200 mcg
No effect on the thinking tests, and exercise felt harder than on placebo.
Two reviews pull it together. Cochrane's 2008 review of six trials found some benefit but only one trial of adequate quality and size, and a 2013 review of 20 trials, all but one from China, rated most of them at high risk of bias.87
What it's stacked with
Huperzine A turns up in the memory formulas, usually next to bacopa or ginkgo. These are its usual neighbors, and what's known about each pairing.
- Bacopa MonnieriStrongNext to huperzine A in BrainPill, Neuro-Peak, Alpha Brain and Brainol. We found no trial of the pair on its own.
- Ginkgo BilobaModerateNext to huperzine A in BrainPill, NeuroQ, Neuro-Peak and BrainMD's Brain & Body Power, among others. We found no trial of the pair on its own.
- Alpha GPCPreliminaryNext to huperzine A in Genius Consciousness. We found no trial of the pair on its own.
We found no trial of huperzine A with bacopa, ginkgo or alpha-GPC on its own, only reviews and trials of whole formulas.
Questions people ask
How much huperzine A should you take?
Should you cycle huperzine A?
Does huperzine A help if your memory is fine?
Does the capsule hold what the label says?
Sources
21 sources cited
- Xu SS, et al. Efficacy of tablet huperzine-A on memory, cognition, and behavior in Alzheimer's disease. Acta Pharmacol Sin, 1995. Abstract read. Accessed Oct 23, 2026. PMID 8701750
- Zhang Z, et al. Clinical efficacy and safety of huperzine alpha in treatment of mild to moderate Alzheimer disease, a placebo-controlled, double-blind, randomized trial. Zhonghua Yi Xue Za Zhi, 2002. Abstract read. Accessed Oct 23, 2026. PMID 12181083
- Rafii MS, et al. A phase II trial of huperzine A in mild to moderate Alzheimer disease. Neurology, 2011. Abstract and full text read. Supported by the NIH and Neuro-Hitech. Accessed Oct 23, 2026. PMID 21502597
- Sun QQ, et al. Huperzine-A capsules enhance memory and learning performance in 34 pairs of matched adolescent students. Acta Pharmacol Sin, 1999. Abstract read. Accessed Oct 23, 2026. PMID 10678121
- Morasch KC, et al. Physiological and neurobehavioral effects of cholinesterase inhibition in healthy adults. Physiol Behav, 2015. Abstract read. Accessed Oct 23, 2026. PMID 25455867
- Wessinger CM, et al. Effect of huperzine A on cognitive function and perception of effort during exercise, a randomized double-blind crossover trial. Int J Exerc Sci, 2021. Abstract read. Accessed Oct 23, 2026. PMID 34567353
- Yang G, et al. Huperzine A for Alzheimer's disease, a systematic review and meta-analysis of randomized clinical trials. PLoS One, 2013. Abstract read. Accessed Oct 23, 2026. PMID 24086396
- Li J, et al. Huperzine A for Alzheimer's disease. Cochrane Database Syst Rev, 2008. Abstract read. Accessed Oct 23, 2026. PMID 18425924
- Crawford C, et al. The scoop on brain health dietary supplement products containing huperzine A. Clin Toxicol, 2020. Abstract read. Accessed Oct 23, 2026. PMID 31990212
- Nootropics Depot. Huperzine A Capsules 200 mcg, product page, Supplement Facts label, price and returns policy. Accessed Oct 23, 2026. nootropicsdepot.com
- Omnient Labs for Nootropics Depot. Certificate of analysis, huperzine A capsules, lot HZBCS1071626, Jul 16, 2026, 0.22 mg a capsule by HPLC. Accessed Oct 20, 2026. Lot report (PDF)
- Nootropics Depot. Meet our third party labs. Omnient Labs "was started as an ISO accredited lab to do advanced lab testing for Nootropics Depot." Accessed Oct 19, 2026. nootropicsdepot.com
- Double Wood Supplements. Huperzine A 200 mcg, product page, Supplement Facts label, price and refund policy. Accessed Oct 21, 2026. doublewoodsupplements.com
- Colmaric Analyticals for Double Wood. Huperzine A, lot 2532200, May 7, 2026, assay by HPLC against 200 mcg a serving, "Conform", no figure printed. Accessed Oct 21, 2026. Lab report (PDF)
- Brand Nutraceuticals for Double Wood. Manufacturer's certificate of analysis, huperzine A lot 2608905, Jul 27, 2026, 187 mcg by in-house HPLC. Accessed Oct 21, 2026. Maker's report (PDF)
- Life Extension. Huperzine A 200 mcg, product page, Supplement Facts label and price. Accessed Oct 21, 2026. lifeextension.com
- Nutricost. Huperzine A 200 mcg, product page, Supplement Facts label and price. Accessed Oct 21, 2026. nutricost.com
- Source Naturals. Huperzine A 200 mcg, product page, Supplement Facts label and warning, sold out. Accessed Oct 21, 2026. sourcenaturals.com
- Swanson. Premium Maximum Strength Huperzine A 200 mcg, product page, Supplement Facts label, caution and price. Accessed Oct 21, 2026. swansonvitamins.com
- Nootropics Expert. Huperzine A. Published Oct 1, 2025. Accessed Oct 23, 2026. nootropicsexpert.com
- Horbäach. Huperzine A 400 mcg per serving, 180 capsules, product page, Supplement Facts label, directions and price. Accessed Oct 28, 2026. horbaach.com
Top Rated Nootropics is an independent research and review platform. We are passionate supplement researchers, not medical professionals. Always consult a qualified healthcare provider before starting any supplement regimen. These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.