--- title: "N-Acetyl-Selank vs N-Acetyl-Semax: Side-by-Side Comparison" description: "Compare N-Acetyl-Selank vs N-Acetyl-Semax — mechanism, half-life, dose range, side effects, and live vendor pricing. N-Acetyl-Selank from $79.99. Side-by-side" lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.bodyhackguide.co/" }, { "@type": "ListItem", "position": 2, "name": "Compare", "item": "https://www.bodyhackguide.co/compare" }, { "@type": "ListItem", "position": 3, "name": "N-Acetyl-Selank vs N-Acetyl-Semax" } ] }, { "@context": "https://schema.org", "@type": "WebPage", "name": "N-Acetyl-Selank vs N-Acetyl-Semax: Side-by-Side Comparison (2026)", "description": "Compare N-Acetyl-Selank vs N-Acetyl-Semax — mechanism, half-life, dose range, side effects, and live vendor pricing. N-Acetyl-Selank from $79.99. 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N-Acetyl-Semax is a cognitive that see the full guide this page is a duplicate of na-semax, which is the canonical, maintained entry. to avoid conflicting or outdated information, all detail - mechanism of action,…. The two differ in mechanism, half-life (Not established for the N-acetyl analog. Parent Selank has a very short plasma half-life (on the order of minutes, as expected for a small peptide) but produces behavioral effects lasting hours, attributed to active fragments and downstream enkephalin/GABA modulation. N-acetylation is claimed to slow N-terminal degradation and extend duration, but this is unquantified in published literature. vs not reported), and typical dose range." } }, { "@type": "Question", "name": "Which has the longer half-life, N-Acetyl-Selank or N-Acetyl-Semax?", "acceptedAnswer": { "@type": "Answer", "text": "N-Acetyl-Selank has a half-life of Not established for the N-acetyl analog. Parent Selank has a very short plasma half-life (on the order of minutes, as expected for a small peptide) but produces behavioral effects lasting hours, attributed to active fragments and downstream enkephalin/GABA modulation. N-acetylation is claimed to slow N-terminal degradation and extend duration, but this is unquantified in published literature.. N-Acetyl-Semax has a half-life of not reported. Longer half-lives generally mean less frequent dosing but slower on/off kinetics." } }, { "@type": "Question", "name": "Can you stack N-Acetyl-Selank and N-Acetyl-Semax?", "acceptedAnswer": { "@type": "Answer", "text": "Stacking depends on mechanism overlap, safety profile, and goals. N-Acetyl-Selank and N-Acetyl-Semax should only be stacked after reviewing each compound's individual protocol page, side effect profile, and any published interaction data. Use the BodyHackGuide stack builder for a structured review before combining research compounds." } } ] } ] --- [Skip to content](#main-content) ## Research Use Only This site is an **educational resource** for research compounds. We do **not endorse** human consumption of any compound. BodyHackGuide and **BHG Labs share common ownership**; we rank every vendor on the same public methodology, and we earn a commission on purchases through our links. By entering, you confirm you are **21 years of age or older** and agree to our [Terms](/terms) & [Privacy Policy](/privacy). I'm 21+ — Enter SiteLeave site [![BodyHackGuide](/assets/bodyhackguide-logo-DOzZNUyh.webp)BodyHackGuide ](/) [Compare](/compare)[Wiki](/wiki)[Vendors](/vendors)[Deals](/deals)[Stacks](/stack-builder)[Nootropics](/nootropics)[Tools](/tools) Learn Community Search ⌘K [Sign In](/auth?returnTo=%2Fcompare%2Fn-acetyl-selank-vs-n-acetyl-semax) 100K+ researchers trust BodyHackGuide — Join [r/BodyHackGuide](https://reddit.com/r/bodyhackguide) 1. [Home](/) 2. [Compare](/compare) 3. N-Acetyl-Selank vs N-Acetyl-Semax # N-Acetyl-Selank vs N-Acetyl-Semax Side-by-side comparison of N-Acetyl-Selank and N-Acetyl-Semax: mechanism, half-life, dose range, safety profile, and live vendor pricing. Updated continuously as new research and listings land. N-Acetyl-Selank from $79.99 ## Live price snapshot ### N-Acetyl-Selank Current low $79.99 as of Sep 5, 2026 7-day low $79.99 30-day low $79.99 30-day change — baseline building ### N-Acetyl-Semax Current low $54.99 as of Apr 6, 2026 7-day low — no 7d data yet 30-day low — no 30d data yet 30-day change — baseline building ## N-Acetyl-Selank N-Acetyl-Selank is the N-terminally acetylated analog of Selank, a tuftsin-derived heptapeptide used intranasally for its reported anxiolytic and nootropic effects. The acetyl group is claimed to improve stability and… **Live lowest price:** $79.99 across 2 vendors [Full N-Acetyl-Selank profile](/compound/n-acetyl-selank) ## N-Acetyl-Semax This is a duplicate/alias entry. The full, maintained guide for this compound lives at NA-Semax (/compound/na-semax). See that page for mechanism, dosing, evidence, and safety. [Full N-Acetyl-Semax profile](/compound/n-acetyl-semax) ## Side-by-side comparison Attribute N-Acetyl-Selank N-Acetyl-Semax Category Cognitive Cognitive Research Stage Preclinical (the N-acetyl analog has no dedicated studies); parent Selank has limited clinical use in Russia Duplicate entry - see NA-Semax Mechanism of Action N-Acetyl-Selank is the N-terminally acetylated analog of Selank, a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) derived from the endogenous immunopeptide tuftsin (Thr-Lys-Pro-Arg) with a C-terminal Pro-Gly-Pro tail added to slow enzymatic breakdown.… See the full guide This page is a duplicate of NA-Semax, which is the canonical, maintained entry. To avoid conflicting or outdated information, all detail - mechanism of action, protocols, dosing, side effects, and verified citations - is kept on that single… Half-Life Not established for the N-acetyl analog. Parent Selank has a very short plasma half-life (on the order of minutes, as expected for a small peptide) but produces behavioral effects lasting hours, attributed to active fragments and downstream enkephalin/GABA modulation. N-acetylation is claimed to slow N-terminal degradation and extend duration, but this is unquantified in published literature. — Typical Dose Range 100-900 — Dosing Frequency Once or twice daily (intranasal); some advanced users split into 2-3 doses — Administration — — Side Effects In short Russian clinical trials, parent Selank was generally well tolerated with no serious adverse effects reported \[PMID:18454096\]. Reported or plausible effects (largely extrapolated to the analog): mild nasal irritation or congestion from the spray,… — Molecular Weight ~793.9 g/mol (theoretical: Selank ~751.9 g/mol + N-terminal acetyl, ~+42). Approximate molecular formula C35H59N11O10. — Common Vial Sizes — — ## Price History 3 data points - Unknown - VANDL Labs - Disguised Alpha ## Price History 2 data points - Unknown - VANDL Labs ### N-Acetyl-Selank — potential benefits - Anxiolytic (calming) effects - the most-studied action of parent Selank, including a Russian clinical trial in generalized anxiety disorder \[PMID:18454096\] - Nootropic / cognitive support - reported attention and memory benefits in rodent models, linked to BDNF changes \[PMID:31625062\] - Stress resilience reported without the sedation, tolerance, or dependence typically seen with benzodiazepines (preclinical framing) \[PMID:30255741\] - Possible support during withdrawal states (alcohol, opioid) in animal models \[PMID:24913576\]\[PMID:36322304\] - Claimed longer duration vs. plain Selank from N-terminal acetylation - a community/vendor claim not verified in published data ### N-Acetyl-Semax — potential benefits - See the full guide at NA-Semax (/compound/na-semax) for benefits and evidence. ## Frequently asked ### What's the difference between N-Acetyl-Selank and N-Acetyl-Semax? N-Acetyl-Selank is a cognitive that n-acetyl-selank is the n-terminally acetylated analog of selank, a synthetic heptapeptide (thr-lys-pro-arg-pro-gly-pro) derived from the endogenous immunopeptide tuftsin…. N-Acetyl-Semax is a cognitive that see the full guide this page is a duplicate of na-semax, which is the canonical, maintained entry. to avoid conflicting or outdated information, all detail - mechanism of action,…. The two differ in mechanism, half-life (Not established for the N-acetyl analog. Parent Selank has a very short plasma half-life (on the order of minutes, as expected for a small peptide) but produces behavioral effects lasting hours, attributed to active fragments and downstream enkephalin/GABA modulation. N-acetylation is claimed to slow N-terminal degradation and extend duration, but this is unquantified in published literature. vs not reported), and typical dose range. ### Which has the longer half-life, N-Acetyl-Selank or N-Acetyl-Semax? N-Acetyl-Selank has a half-life of Not established for the N-acetyl analog. Parent Selank has a very short plasma half-life (on the order of minutes, as expected for a small peptide) but produces behavioral effects lasting hours, attributed to active fragments and downstream enkephalin/GABA modulation. N-acetylation is claimed to slow N-terminal degradation and extend duration, but this is unquantified in published literature.. N-Acetyl-Semax has a half-life of not reported. Longer half-lives generally mean less frequent dosing but slower on/off kinetics. ### Can you stack N-Acetyl-Selank and N-Acetyl-Semax? Stacking depends on mechanism overlap, safety profile, and goals. N-Acetyl-Selank and N-Acetyl-Semax should only be stacked after reviewing each compound's individual protocol page, side effect profile, and any published interaction data. Use the BodyHackGuide stack builder for a structured review before combining research compounds. ## See current vendor prices Live listings from the vendors we track, refreshed continuously. [N-Acetyl-Selank prices](/compound/n-acetyl-selank?tab=prices) [N-Acetyl-Semax prices](/compound/n-acetyl-semax?tab=prices) [Compare all compounds](/compare) ### Before you buy N-Acetyl-Selank or N-Acetyl-Semax Check the vendor trust score. Every supplier we track is rated 0–100 on COA verification, payment transparency, shipping, reviews, and listings — one published, reproducible methodology, applied to every vendor including BHG Labs, which shares our ownership. [View Vendor Scorecard](/vendors/scorecard) ## Related comparisons [Selank vs Semax](/compare/selank-vs-semax)[Noopept vs Piracetam](/compare/noopept-vs-piracetam)[Phenylpiracetam vs Piracetam](/compare/phenylpiracetam-vs-piracetam)[Selank vs Phenibut](/compare/selank-vs-phenibut)[Modafinil vs Phenylpiracetam](/compare/modafinil-vs-phenylpiracetam)[Bromantane vs Modafinil](/compare/bromantane-vs-modafinil)[Dihexa vs Noopept](/compare/dihexa-vs-noopept) **Research use only.** BodyHackGuide is a research and price-comparison reference. BodyHackGuide and BHG Labs share common ownership. The compounds discussed on this page are not approved by the FDA for human consumption and are sold strictly for laboratory research. Prices shown are pulled from vendor listings tracked on BHG and are subject to change. We earn an affiliate commission on some outbound clicks, and every vendor is ranked on the same public, reproducible methodology. 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