--- title: "Selank vs N-Acetyl-Semax: Side-by-Side Comparison (2026)" url: https://www.bodyhackguide.co/compare/selank-vs-n-acetyl-semax description: "Compare Selank vs N-Acetyl-Semax side by side. We earn a commission on some vendor links. Mechanism, half-life, dose range, side effects and prices." lang: en --- Skip to content Compare notes on r/BodyHackGuide (https://reddit.com/r/bodyhackguide) Compare notes with other researchers. Join r/BodyHackGuide (https://reddit.com/r/bodyhackguide) # Selank vs N-Acetyl-Semax Side-by-side comparison of Selank and N-Acetyl-Semax: mechanism, half-life, dose range, safety profile, and vendor pricing. Selank from $25.00 N-Acetyl-Semax: no price on file ## Price snapshot ### Selank Current low $25.00 current listings 7-day low — not enough history yet 30-day low — not enough history yet 30-day change — not enough history yet ### N-Acetyl-Semax Current low — 7-day low — not enough history yet 30-day low — not enough history yet 30-day change — not enough history yet ## Selank Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro, 750 Da molecular weight) developed in the 1990s at the Institute of Molecular Genetics of the Russian Academy of Sciences as a synthetic analog of tuftsin… **Lowest listed price:** $25.00 across 6 listings Full Selank profile (https://www.bodyhackguide.co/compound/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. No vendor price on file. Full N-Acetyl-Semax profile (https://www.bodyhackguide.co/compound/n-acetyl-semax) ## Side-by-side comparison | Attribute | Selank | N-Acetyl-Semax | | --- | --- | --- | | Category | Nootropics | Cognitive | | Research Stage | Approved (Russia, as anxiolytic and nootropic medication) | Duplicate entry - see NA-Semax | | Mechanism of Action | Primary Mechanism: Multi-System Neurochemical Modulation Selank does not have a single clean receptor-binding mechanism. Unlike benzodiazepines (GABA-A positive allosteric modulators), SSRIs (serotonin reuptake inhibition), or buspirone (5-HT1A partial… | 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 To avoid conflicting or outdated information, all detail - mechanism of action, protocols, dosing, side effects, and verified citations - is kept on that single… | | Half-Life | ~2-3 minutes plasma half-life (functional anxiolytic and nootropic effects persist 12-24 hours due to gene expression and neurotransmitter modulation) | — | | Typical Dose Range | 250-750 mcg intranasal daily (0.15% solution: 2-3 drops per nostril 2-3x daily); typical course is 14-21 days | — | | Dosing Frequency | Intranasal 1–3 times daily | — | | Administration | Intranasal | — | | Side Effects | Overall Safety Profile Selank has one of the best safety profiles in the anxiolytic space. Over 15+ years of Russian clinical use and research, the compound has been associated with essentially no serious adverse events at therapeutic doses. This compares… | — | | Molecular Weight | 751.9 Da | — | | Common Vial Sizes | 5mg, 10mg | — | ## Price History 5 data points - OF - Half Nattys - Ion Peptide - BHG Labs ### Selank: potential benefits - Anxiolytic effects comparable to benzodiazepines but without sedation or dependence in Russian clinical trials (PMID: 18454096) - Positive allosteric modulation of brain GABA receptors through a non-benzodiazepine binding site (PMID: 30255741) - Immunomodulation via Th1/Th2 cytokine balance and IL-6 regulation in patients with anxiety-asthenic disorders (PMID: 18577961) - Cognitive and memory support linked to BDNF upregulation in the hippocampus in preclinical models (PMID: 18841804) - Modulation of the endogenous enkephalin-opioid system supporting mood and stress tolerance (PMID: 22550852) - Anti-inflammatory and adaptogenic effects through normalization of stress-induced cytokine dysregulation - Non-addictive anxiolytic profile - no tolerance, withdrawal, or dependence reported across years of Russian clinical use ### 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 Selank and N-Acetyl-Semax? Selank is a nootropics that primary mechanism: multi-system neurochemical modulation selank does not have a single clean receptor-binding mechanism. unlike benzodiazepines (gaba-a positive allosteric…. 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 (~2-3 minutes plasma half-life (functional anxiolytic and nootropic effects persist 12-24 hours due to gene expression and neurotransmitter modulation) vs not reported), and typical dose range. ### Which has the longer half-life, Selank or N-Acetyl-Semax? Selank has a half-life of ~2-3 minutes plasma half-life (functional anxiolytic and nootropic effects persist 12-24 hours due to gene expression and neurotransmitter modulation). 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 Selank and N-Acetyl-Semax? Stacking depends on mechanism overlap, safety profile, and goals. 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 Listings from the vendors we track. Prices change often, so check the vendor before you buy. Selank prices: https://www.bodyhackguide.co/compound/selank?tab=prices N-Acetyl-Semax prices: https://www.bodyhackguide.co/compound/n-acetyl-semax?tab=prices Compare all compounds: https://www.bodyhackguide.co/compare ### Before you buy 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. View Vendor Scorecard (https://www.bodyhackguide.co/vendors/scorecard) ## Related comparisons Selank vs Semax: https://www.bodyhackguide.co/compare/selank-vs-semax N Acetyl Selank vs N Acetyl Semax: https://www.bodyhackguide.co/compare/n-acetyl-selank-vs-n-acetyl-semax Selank vs Phenibut: https://www.bodyhackguide.co/compare/selank-vs-phenibut **Research use only.** BodyHackGuide is a research and price-comparison reference. 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. See editorial standards (https://www.bodyhackguide.co/editorial-standards) and affiliate disclosure (https://www.bodyhackguide.co/affiliate-disclosure). Image: BodyHackGuide (https://www.bodyhackguide.co/assets/bodyhackguide-logo-DOzZNUyh.webp) ### BodyHackGuide Your biohacking research hub: compound pricing, brain health protocols, dosing tools, and vendor reviews. support@bodyhackguide.co Join our Discord: https://discord.gg/Mhq5UdRYBA r/BodyHackGuide on Reddit: https://reddit.com/r/BodyHackGuide #### Explore - Compare prices: https://www.bodyhackguide.co/compare - Vendors: https://www.bodyhackguide.co/vendors - Deals: https://www.bodyhackguide.co/deals - Coupons: https://www.bodyhackguide.co/coupons - Nootropics: https://www.bodyhackguide.co/nootropics - Brain health: https://www.bodyhackguide.co/brain-health - Blog: https://www.bodyhackguide.co/blog - Guides: https://www.bodyhackguide.co/guides #### Tools - Reconstitution: https://www.bodyhackguide.co/tools/reconstitution - Half-life visualizer: https://www.bodyhackguide.co/tools/halflife - COA reader: https://www.bodyhackguide.co/tools/coa - Cost calculator: https://www.bodyhackguide.co/tools/cost-calculator - Stack builder: https://www.bodyhackguide.co/stack-builder - All tools: https://www.bodyhackguide.co/tools #### Trust & vendors - Vendor directory: https://www.bodyhackguide.co/vendors - Trust scorecard: https://www.bodyhackguide.co/vendors/scorecard - Vendor trust badge: https://www.bodyhackguide.co/vendors/get-vetted - Scoring methodology: https://www.bodyhackguide.co/vendors/methodology - Peptide cheat sheet: https://www.bodyhackguide.co/guides/peptide-cheat-sheet-download #### Company - About: https://www.bodyhackguide.co/about - Affiliate disclosure: https://www.bodyhackguide.co/affiliate-disclosure - Editorial standards: https://www.bodyhackguide.co/editorial-standards - Creators: https://www.bodyhackguide.co/creators - Coaches: https://www.bodyhackguide.co/coaches - 1-on-1 coaching: https://www.bodyhackguide.co/coaching - Privacy: https://www.bodyhackguide.co/privacy - Terms: https://www.bodyhackguide.co/terms - Full site directory: https://www.bodyhackguide.co/site-directory **Affiliate Disclosure:** We rank every vendor on the same public, reproducible methodology (https://www.bodyhackguide.co/vendors/methodology), and we earn a commission from purchases made through some of our links at no extra cost to you. Full details in our affiliate disclosure (https://www.bodyhackguide.co/affiliate-disclosure). **Research Disclaimer:** All compounds listed are for laboratory and research purposes only. Not for human consumption. This site does not sell or ship any products. Always consult a qualified healthcare professional and comply with local regulations. © 2026 BodyHackGuide. All rights reserved. · Terms (https://www.bodyhackguide.co/terms) · Privacy (https://www.bodyhackguide.co/privacy) ## Structured data ```json [ { "@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": "Selank vs N-Acetyl-Semax" } ] }, { "@context": "https://schema.org", "@type": "WebPage", "name": "Selank vs N-Acetyl-Semax: Side-by-Side Comparison (2026)", "description": "Compare Selank vs N-Acetyl-Semax side by side. We earn a commission on some vendor links. Mechanism, half-life, dose range, side effects and prices.", "url": "https://www.bodyhackguide.co/compare/selank-vs-n-acetyl-semax", "dateModified": "2026-10-23", "isPartOf": { "@type": "WebSite", "name": "BodyHackGuide", "url": "https://www.bodyhackguide.co" }, "mainEntity": { "@type": "ItemList", "itemListElement": [ { "@type": "ListItem", "position": 1, "item": { "@type": "Product", "name": "Selank", "description": "Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro, 750 Da molecular weight) developed in the 1990s at the Institute of Molecular Genetics of the Russian Academy of Sciences as a synthetic analog of tuftsin — an immunomodulatory tetrapeptide (Thr-Lys-Pro-Arg) that is naturally cleaved…", "url": "https://www.bodyhackguide.co/compound/selank", "category": "Nootropics", "offers": { "@type": "AggregateOffer", "lowPrice": "25.00", "priceCurrency": "USD", "offerCount": 6 } } }, { "@type": "ListItem", "position": 2, "item": { "@type": "Product", "name": "N-Acetyl-Semax", "description": "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.", "url": "https://www.bodyhackguide.co/compound/n-acetyl-semax", "category": "Cognitive" } } ] } }, { "@context": "https://schema.org", "@type": "Organization", "@id": "https://www.bodyhackguide.co#organization", "name": "BodyHackGuide", "alternateName": "BHG", "url": "https://www.bodyhackguide.co", "logo": { "@type": "ImageObject", "url": "https://www.bodyhackguide.co/logo.png", "width": 512, "height": 512 }, "description": "Evidence-based research reference for peptides and nootropics. 273 compound profiles, interactive dosing calculators, vendor price comparisons, and trust-scored vendor reviews scored on a public, reproducible methodology applied to every vendor. We earn a commission on purchases through some of our links.", "foundingDate": "2024", "founder": { "@id": "https://www.bodyhackguide.co/about#person" }, "sameAs": [ "https://reddit.com/r/BodyHackGuide", "https://reddit.com/r/BrainHackGuide", "https://reddit.com/r/Biohackingher", "https://discord.gg/Mhq5UdRYBA" ], "knowsAbout": [ "Peptide research", "Nootropic research", "Biohacking", "Compound dosing", "Vendor transparency" ], "publishingPrinciples": "https://www.bodyhackguide.co/editorial-standards", "ethicsPolicy": "https://www.bodyhackguide.co/editorial-standards", "diversityPolicy": "https://www.bodyhackguide.co/editorial-standards" }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What's the difference between Selank and N-Acetyl-Semax?", "acceptedAnswer": { "@type": "Answer", "text": "Selank is a nootropics that primary mechanism: multi-system neurochemical modulation selank does not have a single clean receptor-binding mechanism. unlike benzodiazepines (gaba-a positive allosteric…. 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 (~2-3 minutes plasma half-life (functional anxiolytic and nootropic effects persist 12-24 hours due to gene expression and neurotransmitter modulation) vs not reported), and typical dose range." } }, { "@type": "Question", "name": "Which has the longer half-life, Selank or N-Acetyl-Semax?", "acceptedAnswer": { "@type": "Answer", "text": "Selank has a half-life of ~2-3 minutes plasma half-life (functional anxiolytic and nootropic effects persist 12-24 hours due to gene expression and neurotransmitter modulation). 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 Selank and N-Acetyl-Semax?", "acceptedAnswer": { "@type": "Answer", "text": "Stacking depends on mechanism overlap, safety profile, and goals. 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." } } ] } ] ```