Cognition
Semax
Focus and Mental Clarity
Flat $35 tracked shipping10mg per vial
$150 USD
Add 2 more, unlock 19%
| Test | Result | Verdict |
|---|---|---|
| Purity, HPLC | 99.05% | PASS |
| Identity, LC-MS | Confirmed | PASS |
| Sterility | No growth | PASS |
| Endotoxin | Within limit | PASS |
| Heavy metals + fentanyl | Not detected | PASS |
Shipping, delivery and guarantee terms
- Shipping
- Flat $35, tracked worldwide to supported markets
- Delivery
- 5 to 10 business days, guaranteed
- Payment
- Card, bank transfer, or crypto · All sales final except a purity failure
- Included
- 60-day money-back guarantee · Third-party batch COA
The short answer
What is Semax?
Semax is a synthetic peptide based on a fragment of the hormone ACTH, the ACTH(4-10) sequence, developed in Russia and studied there as a nootropic for attention, memory, and neuroprotection. Animal research reports that it raises brain-derived neurotrophic factor (BDNF), a growth factor tied to learning (Dolotov et al., 2006), and clinical work from Russian groups has examined it in settings such as ischemic stroke (Gusev et al., 2018). Outside Russia it is treated as a research compound: the large independent Western trials common to approved drugs do not exist for it, which is the central caveat on everything here. Published protocols describe intranasal and subcutaneous use in short courses, always reported in units rather than mL, and those figures are what studies used, not a dose for any person.
The Science
A Neuropeptide for Focus
Semax is a short fragment related to a naturally occurring hormone. Research, much of it from Russian groups, points to effects on BDNF and attention-related signaling. We present it honestly as a promising nootropic rather than a proven drug.
BDNF Signaling
Studied for its influence on brain-derived neurotrophic factor, involved in learning and neuroprotection.
Attention Support
Attention under sustained mental load is one of the studied endpoints.
Non-Stimulant
Unlike caffeine or stimulants, the reported effect is subtle and does not come with a crash.
Applications
Common Use Cases
Deep-Work Focus
Short courses during high mental demand is the pattern published protocols describe.
Mental Clarity
Verbal fluency appears alongside attention and memory in the studied endpoints.
Cognitive Stack
Paired with Selank for balanced focus and calm.
Neuroprotection Interest
Studied for BDNF-related neuroprotective signaling.
Comparison
Semax vs Selank: how do they compare?
Semax and Selank are sister peptides from the same Russian research tradition, and they are often studied and stacked together. The short version: Semax leans toward focus and mental clarity, while Selank leans toward calm and reduced anxiety. Semax is a fragment-based analog of the hormone ACTH studied for attention, memory, and BDNF (Dolotov et al., 2006); Selank is an analog of the immune peptide tuftsin studied as an anxiolytic acting on GABA and serotonin signaling.
| Feature | Semax | Selank |
|---|---|---|
| Parent molecule | ACTH(4-10) fragment analog | Tuftsin (immune peptide) analog |
| Studied focus | Attention, memory, BDNF | Anxiolytic (calm), GABA and serotonin |
| Common research angle | Focus and cognition | Calm and reduced anxiety |
| Routes studied | Intranasal, subcutaneous | Intranasal, subcutaneous |
| Evidence base | Mostly Russian research groups | Mostly Russian research groups |
Because their studied profiles complement each other, the two are frequently paired so focus does not tip into overstimulation and calm does not tip into dullness. See the Selank page for the calm side of the pairing. Neither is an approved drug, and any protocol is a decision for a licensed clinician.
How it is used in research
Semax nasal spray or injection: which route do studies use?
The published work describes two routes. Intranasal Semax, given as drops or a spray, is the more commonly described route in the Russian literature, and much of the clinical work used it (Gusev et al., 2018). A subcutaneous route also appears. Both are used in short, pulsed courses rather than continuous administration, and figures are reported in units rather than mL.
Published intranasal protocols describe repeated dosing across the day rather than a single daily dose. This page does not provide a recipe for preparing a nasal spray or a dose for any individual: how a compound is prepared and administered is a decision for a licensed clinician, and the reconstitution calculator only works the concentration math for a lyophilized vial.
Research Timeline
What the studies measured, and when
Research Timeline
What the studies measured, and when
Research timeline
What the studies measured, and when
What it is
Semax is a synthetic ACTH(4-10) analog, studied for attention, memory and BDNF expression endpoints.
Week 1
Most common reported window for noticing steadier concentration during demanding mental work.
Pulsed courses
Published protocols describe short courses rather than continuous administration. The site reports those ranges and picks no schedule for anyone.
Evidence base
Most of the published clinical work comes from Russian research groups; large independent Western trials are limited. That gap is the central caveat on every figure here.
Your Kit
What's Included
$150 USD
Flat $35 shipping · All sales final
Semax 10mg Vial
10mg per vial · Lyophilized powder, sealed vial
Study Protocol Reference
The intranasal and subcutaneous ranges published studies used
Worldwide Shipping
5 to 10 business days, guaranteed
Ongoing order support
Direct team access
Your kit includes the vials and bacteriostatic water. Insulin syringes ship to select delivery regions; where they can't ship, we send a same-day sourcing link. A printed reference guide ships with every order.
Traveling with your order
Freeze-dried vials travel well; reconstituted vials travel cold. Rules vary by country. Share your dates when you order.
Why your vials arrive plain
Unlabeled on purpose: discreet, and standard for research-grade material. Match a batch to its certificate with your order number. See the COA page.
Verified orders
What buyers said about their Semax order
5.00 · 9 reviews from orders containing this vial. Published word for word.
third order from these guys. caps are tighter this time compared to last month, and the tray was a new design with a little ridge that keeps the vials from rolling. i sent the semax off to a reference lab up the street, came back at 99.2% assay, hplc. tracking was smooth, app updated every step. box was about two pounds, heavier than i guessed for three vials. all good.
Anonymous - Melbourne
Verified order · BPC-157, CJC-1295 / Ipamorelin, Semax · Aug 18, 2026
I ordered on a wednesday night and it shipped the very next morning which is faster than i have seen from anyone else doing this. The box arrived with no visible transit damage, tape intact, corners crisp and square. Both vials seated in foam so firmly that neither moved at all when i rotated the tray back and forth
R. - Miami, FL
Verified order · Semax, SLU-PP-332 · Aug 08, 2026
good.
Anonymous - Phoenix, AZ
Verified order · Semax · Aug 02, 2026
i found them through a friend of a friend who does travel medicine and just happens to keep a running list of peptide vendors that actually publish their own lab sheets instead of linking out to somebody else. first order, arrived in about the window they quoted which felt reasonable for an international haul like this one
Anon - Sydney
Verified order · Semax, Selank · Jul 20, 2026
a coworker texted me some peptide names she was curious about and i ended up comparing four or five labs before picking anyone, peptara just happened to be the only one that posted their own sheets without making you chase them down first. order landed roughly on schedule which felt fair for a cross border run
Piper - Perth
Verified order · Semax, Selank · Jun 14, 2026
i found them through a reddit thread where someone was posting their hplc reports and comparing vendors, and honestly the numbers on the peptara sheet were what sealed it for me. ordered from hanoi to be safe about timing, package hit in five days. vials clear, no particulates visible against the light. caps had that factory crimp look rather than a hand twist feel. all straightforward
Tam - Hanoi
Verified order · Retatrutide, Semax · Jun 08, 2026
Our Guarantee
We Stand Behind Our Quality.
Peptara Labs supplies research-grade Semax, third-party tested with a Certificate of Analysis on every batch. The guarantee is on the material and on how the order is handled. It is not a guarantee of any outcome.
60-Day Money Back Guarantee
Test it at any lab, or your money back
Send any vial to an independent lab within 60 days of delivery. If it does not test as stated on its certificate of analysis (COA), or your order was not handled correctly, you get a full refund. The 60 days is your window to verify us, not a shelf life. The guarantee is on product quality, never on a health outcome.
Study Protocol Reference, Included
Every order includes a written reference to the dose ranges published studies used, with the study named, plus support at no extra cost. This is not a prescription; consult a licensed physician.
Direct WhatsApp Access
Every order includes direct access to our support team. Questions about certificates, reconstitution, storage, shipping or an order, message us any time and a real person responds.
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Quality guarantee: full refund on any purity failure. All sales otherwise final. The 60-day money back guarantee covers product purity, certificate of analysis, and fulfillment. It is not conditioned on any outcome and does not promise one. This is educational information, not medical advice; consult a licensed physician.
Research and citations
Peer-reviewed sources
- Gusev EI, et al. (2018). [The efficacy of semax in the tretament of patients at different stages of ischemic stroke]. Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova. doi.org/10.17116/jnevro20181183261-68
- Panikratova YR, et al. (2020). Functional Connectomic Approach to Studying Selank and Semax Effects. Doklady Biological Sciences. doi.org/10.1134/S001249662001007X
- Dmitrieva VG, et al. (2010). Semax and Pro-Gly-Pro activate the transcription of neurotrophins and their receptor genes after cerebral ischemia. Cellular and Molecular Neurobiology. doi.org/10.1007/s10571-009-9432-0
Citations refer to the peer-reviewed publications these figures are taken from. Every dose range reported on this site is the range a named study used. Not a substitute for medical advice.
Explore more
Related guides, comparisons, and compounds studied for related endpoints
Semax complete guide
The full evidence, dosing routes, cycling, and side-effect rundown for Semax.
Selank
Sister peptide for calm and anxiety support, often paired with Semax.
Best peptides for cognition
Where Semax sits among peptides studied for focus, memory, and mental clarity.
CJC-1295 / Ipamorelin
Sleep and recovery peptide for a cognition-plus-recovery stack.
Reconstitution calculator
Concentration math for a lyophilized vial, in units rather than mL.
Peptara FAQ
Sourcing, COAs, cold-chain, and payment questions answered.
Research kits
Five named kits grouped by research area, each at 35% off combined retail.
Semax FAQ
Order Semax, 10mg vial
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