--- title: "NA-Semax Amidate: Dosing & Vendor Prices | BodyHackGuide" description: "NA-Semax Amidate: dosing protocols, mechanism & side effects, 2 PubMed results. Compare current vendor prices." 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": "Compounds", "item": "https://www.bodyhackguide.co/compare" }, { "@type": "ListItem", "position": 3, "name": "NA-Semax Amidate" } ] }, { "@context": "https://schema.org", "@type": "MedicalWebPage", "name": "NA-Semax Amidate", "description": "NA-Semax Amidate is the C-terminally amidated NA-Semax — the carboxylic acid at the peptide's C-terminus is replaced with an amide group (-NH2), which is reported to further extend metabolic half-life by resisting carboxypeptidase cleavage in addition to the aminopeptidase resistance the N-acetyl group already provides. The practical effect is a peptide with dosing-frequency use: where standard Semax often requires 3-4 daily doses to maintain effect, NA-Semax Amidate is reported (in vendor monographs and community usage) to maintain subjective effects on a 1-2x daily schedule. Direct pharmacokinetic comparisons in peer-reviewed literature remain absent — this framing is honest about the evidence base.", "lastReviewed": "2026-09-13T18:37:02.339Z", "url": "https://www.bodyhackguide.co/compound/na-semax-amidate", "author": { "@type": "Person", "name": "BioChonch", "url": "https://www.bodyhackguide.co/about", "jobTitle": "Founder & Lead Researcher", "sameAs": [ "https://x.com/bodyhackguide", "https://reddit.com/r/BodyHackGuide", "https://reddit.com/r/BrainHackGuide", "https://reddit.com/r/Biohackingher" ], "worksFor": { "@type": "Organization", "name": "BodyHackGuide", "url": "https://www.bodyhackguide.co" } }, "reviewedBy": { "@type": "Person", "name": "BioChonch", "url": "https://www.bodyhackguide.co/about", "jobTitle": "Founder & Lead Researcher", "sameAs": [ "https://x.com/bodyhackguide", "https://reddit.com/r/BodyHackGuide", "https://reddit.com/r/BrainHackGuide", "https://reddit.com/r/Biohackingher" ], "worksFor": { "@type": "Organization", "name": "BodyHackGuide", "url": "https://www.bodyhackguide.co" } }, "publisher": { "@type": "Organization", "name": "BodyHackGuide", "url": "https://www.bodyhackguide.co" }, "mainContentOfPage": { "@type": "WebPageElement", "cssSelector": "main" }, "about": { "@type": "Drug", "name": "NA-Semax Amidate", "alternateName": [ "NA-Semax Amide", "N-Acetyl Semax Amide", "NA-Semax-NH2", "Acetyl-Semax-Amide" ], "description": "NA-Semax Amidate is the C-terminally amidated NA-Semax — the carboxylic acid at the peptide's C-terminus is replaced with an amide group (-NH2), which is reported to further extend metabolic half-life by resisting carboxypeptidase cleavage in addition to the aminopeptidase resistance the N-acetyl group already provides. The practical effect is a peptide with dosing-frequency use: where standard Semax often requires 3-4 daily doses to maintain effect, NA-Semax Amidate is reported (in vendor monographs and community usage) to maintain subjective effects on a 1-2x daily schedule. Direct pharmacokinetic comparisons in peer-reviewed literature remain absent — this framing is honest about the evidence base.", "activeIngredient": "NA-Semax Amidate", "mechanismOfAction": "Mechanism (inherited from parent Semax - the N-acetyl / C-amidate analog itself has not been directly studied): BDNF upregulation in hippocampus + cortex - a single intranasal dose of Semax raises hippocampal BDNF protein and TrkB expression in rodents, alongside improved learning ([Dolotov et al., 2006; PMID 16996037]) Dopaminergic + serotonergic modulation - Semax raises striatal serotonin turnover (5-HIAA) and potentiates amphetamine-evoked striatal dopamine release in rodents ([Eremin et al., 2005; PMID 16362768]) NE turnover modulation Anti-inflammatory (IL-6, TNF- suppression) Pharmacokinetic improvements (theoretical, not measured for this analog): N-acetyl group - intended to block aminopeptidase cleavage at the N-terminus C-terminal amide - intended to block carboxypeptidase cleavage at the C-terminus Net result - reportedly 2-4x longer functional duration vs. unmodified Semax (vendor + community claim, not peer-reviewed) Note: every mechanism above is extrapolated from published research on Semax itself. NA-Semax Amidate has no pharmacology or human clinical data of its own - the acetyl and amide modifications have not been separately characterized.", "legalStatus": "Not approved for human use — research chemical", "warning": "For research purposes only. Not for human consumption." } }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What is NA-Semax Amidate used for in research?", "acceptedAnswer": { "@type": "Answer", "text": "NA-Semax Amidate is the C-terminally amidated NA-Semax — the carboxylic acid at the peptide's C-terminus is replaced with an amide group (-NH2), which is reported to further extend metabolic half-life by resisting carboxypeptidase cleavage in addition to the aminopeptidase resistance the N-acetyl group already provides. The practical effect is a peptide with dosing-frequency use: where standard Semax often requires 3-4 daily doses to maintain effect, NA-Semax Amidate is reported (in vendor monographs and community usage) to maintain subjective effects on a 1-2x daily schedule. Direct pharmacokinetic comparisons in peer-reviewed literature remain absent — this framing is honest about the evidence base." } }, { "@type": "Question", "name": "What forms does NA-Semax Amidate come in?", "acceptedAnswer": { "@type": "Answer", "text": "NA-Semax Amidate is available in vials, capsules, and sprays forms." } }, { "@type": "Question", "name": "How much does NA-Semax Amidate cost?", "acceptedAnswer": { "@type": "Answer", "text": "Pricing varies by vendor and form." } }, { "@type": "Question", "name": "How do I compare NA-Semax Amidate vendors?", "acceptedAnswer": { "@type": "Answer", "text": "Compare prices, payment methods, shipping, and COA scores across 0 vendors." } } ] }, { "@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. 124+ compound profiles, interactive dosing calculators, real-time vendor pricing, and trust-scored vendor reviews scored on a public, reproducible methodology applied to every vendor. BodyHackGuide and BHG Labs share common ownership, and we earn a commission on purchases through our links.", "foundingDate": "2024", "founder": { "@id": "https://www.bodyhackguide.co/about#person" }, "sameAs": [ "https://x.com/bodyhackguide", "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" } ] --- [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=%2Fcompound%2Fna-semax-amidate) 100K+ researchers trust BodyHackGuide. Join [r/BodyHackGuide](https://reddit.com/r/bodyhackguide) 1. [Home](/) 3. [Compounds](/compare) 5. NA-Semax Amidate [🛒 Where to buy NA-Semax Amidate](/buy/na-semax-amidate)[🏷️ NA-Semax Amidate coupon codes](/coupons/na-semax-amidate)[📋 NA-Semax Amidate protocol](/protocol/na-semax-amidate)[🔄 Alternatives to NA-Semax Amidate](/alternatives-to/na-semax-amidate)[⚠️ NA-Semax Amidate side effects](/side-effects/na-semax-amidate) 1. [Home](/) 3. [Compounds](/compare) 5. NA-Semax Amidate # NA-Semax Amidate Nootropic Peptide Preclinical Download PDF Also known as: NA-Semax Amide, N-Acetyl Semax Amide, NA-Semax-NH2, Acetyl-Semax-Amide NA-Semax Amidate is the C-terminally amidated NA-Semax — the carboxylic acid at the peptide's C-terminus is replaced with an amide group (-NH2), which is reported to further extend metabolic half-life by resisting carboxypeptidase cleavage in addition to the aminopeptidase resistance the N-acetyl group already provides. The practical effect is a peptide with dosing-frequency use: where standard Semax often requires 3-4 daily doses to maintain effect, NA-Semax Amidate is reported (in vendor monographs and community usage) to maintain subjective effects on a 1-2x daily schedule. Direct pharmacokinetic comparisons in peer-reviewed literature remain absent — this framing is honest about the evidence base.. Half-Life: ~30-45 minutes (estimated, longer than standard Semax) MW: ~855.0 g/mol (C39H54N10O10S; monoisotopic ~854.4) [2 PubMed Results](https://pubmed.ncbi.nlm.nih.gov/?term=NA-Semax%20Amidate) Last reviewed: Sep 12, 2026 [ 2 PubMed Results ](https://pubmed.ncbi.nlm.nih.gov/?term=NA-Semax%20Amidate)[ Nootropic Peptide Category ](/wiki#cat-nootropic-peptide) Preclinical Research Stage OverviewChemical InfoDosing & ProtocolsInteractionsResearchCompare PricesRelated ## Overview ### At A Glance Mechanism Mechanism (inherited from parent Semax - the N-acetyl / C-amidate analog itself has not been directly studied):… Half-Life ~30-45 minutes (estimated, longer than standard Semax) Safety Notes Common Mild nasal irritation ### Mechanism of Action **Mechanism (inherited from parent Semax - the N-acetyl / C-amidate analog itself has not been directly studied):** - BDNF upregulation in hippocampus + cortex - a single intranasal dose of Semax raises hippocampal BDNF protein and TrkB expression in rodents, alongside improved learning (\[Dolotov et al., 2006; PMID 16996037\]) - Dopaminergic + serotonergic modulation - Semax raises striatal serotonin turnover (5-HIAA) and potentiates amphetamine-evoked striatal dopamine release in rodents (\[Eremin et al., 2005; PMID 16362768\]) - NE turnover modulation - Anti-inflammatory (IL-6, TNF- suppression) **Pharmacokinetic improvements (theoretical, not measured for this analog):** - **N-acetyl group** - intended to block aminopeptidase cleavage at the N-terminus - **C-terminal amide** - intended to block carboxypeptidase cleavage at the C-terminus - **Net result** - reportedly 2-4x longer functional duration vs. unmodified Semax (vendor + community claim, not peer-reviewed) Note: every mechanism above is extrapolated from published research on Semax itself. NA-Semax Amidate has no pharmacology or human clinical data of its own - the acetyl and amide modifications have not been separately characterized. ### Overview NA-Semax Amidate is the **C-terminally amidated [NA-Semax](/compound/na-semax)** — the carboxylic acid at the peptide's C-terminus is replaced with an amide group (-NH2), which is reported to further extend metabolic half-life by resisting carboxypeptidase cleavage in addition to the aminopeptidase resistance the N-acetyl group already provides. The practical effect is a peptide with **dosing-frequency use**: where standard Semax often requires 3-4 daily doses to maintain effect, NA-Semax Amidate is reported (in vendor monographs and community usage) to maintain subjective effects on a 1-2x daily schedule. Direct pharmacokinetic comparisons in peer-reviewed literature remain absent — this framing is honest about the evidence base. ## Chemical Information IUPAC Name Not yet available CAS Number Not yet available Molecular Formula C40H57N13O10 Molecular Mass ~855.0 g/mol (C39H54N10O10S; monoisotopic ~854.4) Amino Acid Sequence Ac-Met-Glu-His-Phe-Pro-Gly-Pro-NH2 (Ac-MEHFPGP-NH2) ## Dosing & Protocols ### Dosing Summary Dose 200-1200 mcg/day Route Intranasal Frequency 1-2x daily Duration 14-30 day cycles ### Beginner Protocol ### Intermediate Protocol ### Advanced Protocol ### Stacking Notes [Full NA-Semax Amidate Dosing Guide](/guides/dosage/na-semax-amidate) [Open Reconstitution Calculator](/tools/reconstitution) ### Unlock Dosing Protocols Free account gets you: - View beginner, intermediate & advanced protocols - See weight-based dosing calculations - Access cycle length & frequency data [Create free account](/auth)[Sign in](/auth) 2,800+ researchers already in ## Research [2 PubMed Results](https://pubmed.ncbi.nlm.nih.gov/?term=NA-Semax%20Amidate) ### Safety & Side Effects **Research use only - not FDA approved.** NA-Semax Amidate is a chemically modified peptide sold strictly for laboratory research. It has no approved human indication and no published human safety data for this specific N-acetyl-amidate analog. The notes below are extrapolated from the parent peptide Semax and from anecdotal user reports - not from controlled studies of this compound. **Reported / anticipated effects (mostly anecdotal, intranasal route):** - Transient nasal or throat irritation and rhinorrhea (runny nose) after intranasal dosing - Mild headache - Mild fatigue, or conversely an initial alertness/stimulation spike - Lightheadedness in some users, more likely at higher doses **Important framing:** Semax has a decades-long history of clinical use in Russia with a generally mild reported safety profile, but that record does **not** automatically transfer to this modified analog. The N-acetyl and C-amide changes alter the molecule, and its safety, long-term effects, and true duration have not been formally studied. Absence of reported serious effects here reflects absence of study, not proof of safety. [Browse Studies on PubMed](https://pubmed.ncbi.nlm.nih.gov/?term=NA-Semax%20Amidate) ### Unlock Research Data Free account gets you: - Browse PubMed study summaries - See clinical trial phases & results - Access mechanism of action details [Create free account](/auth)[Sign in](/auth) 2,800+ researchers already in ## Interactions ### Contraindications **Do not use outside of a research setting.** NA-Semax Amidate is not a medicine and has not been evaluated for human use; the points below are conservative precautions, not trial-derived medical contraindications for this compound. - **Pregnancy and lactation** - avoid; there are no reproductive or developmental safety data for this analog. - **Known peptide or Semax hypersensitivity** - discontinue immediately if any allergic or hypersensitivity reaction occurs. - **Mania or bipolar-spectrum instability** - caution; nootropic, dopaminergic-modulating peptides may theoretically aggravate activation, though this is not established for this compound. - **Concurrent CNS-active medications or stimulants** - no interaction data exist for this analog; combining is untested. These precautions are extrapolated from the parent peptide Semax and from general peptide-research safety practice, not from any published study of NA-Semax Amidate itself. Research Disclaimer This interaction data is compiled from published research and community reports. It may not be exhaustive. Always consult a healthcare professional before combining compounds. [Sign in for alerts ](/auth) No listings found for NA-Semax Amidate. Get NA-Semax Amidate Price Drop Alerts Set a target price and we'll notify you when any vendor drops below it. [Sign in to set alerts](/auth) ### Sign in to leave a review Reviews on BodyHackGuide are tied to verified user accounts and moderated before publishing. Sign in (free, no spam) to share your experience with NA-Semax Amidate. [Sign in](/auth) ### Related Compounds [View All](/wiki) [ ### Adalank Nootropic Peptide Preclinical / Research compound Adalank is a hybrid research peptide combining structural elements of Adamax (the adamantyl-modified Semax analog) and Selank (the anxiolytic Pro-Gly-Pro tuftsin analog). t½ The commonly cited ~72-hour "functional duration" is an unverified community/vendor claim, not a measured value - no pharmacokinetic study of Adalank has ever been run. The figure is extrapolated from parent Adamax marketing claims. Actual serum half-life is unknown; there is no published PK data. 200-1200 mcg per dose (intranasal or subcutaneous), 1-2x daily Preclinical View Profile ](/compound/adalank)[ ### Adamax Nootropic Peptide Preclinical / Research compound Adamax is a synthetic nonapeptide (Ac-MEHFPGPAG-NH2) classified as a designer analog of Semax. t½ No pharmacokinetic data. Community reports describe a subjectively long duration of effect (~2-3 days), supporting every-other-day or 3x/week dosing; serum half-life not characterized. 500-2000 mcg subcutaneous (community research dosing) Preclinical View Profile ](/compound/adamax)[ ### Cerebrolysin Nootropic Peptide Clinical Cerebrolysin is a porcine brain-derived peptide complex developed by EVER Neuro Pharma (Austria) — a low-molecular-weight neurotrophic preparation containing a mixture of free amino acids and bioactive peptides extracted from purified pig brain proteins. t½ ~2-4 hours (multi-component peptide mix) 85 PubMed View Profile ](/compound/cerebrolysin)[ ### Cortexin Nootropic Peptide Marketed in Russia/CIS (Geropharm); human clinical use with limited-quality evidence (small, mostly Russian-language studies; no Western RCT; not FDA/EMA approved) Cortexin is a purified peptide preparation extracted from cattle and pig cerebral cortex tissue — a low-molecular-weight neuropeptide complex used clinically in Russia and Eastern Europe for cognitive impairment, post-stroke recovery, encephalopathy, attention disorders, and pediatric developmental conditions. Like Cerebrolysin, Cortexin is positioned as a broad-spectrum neurotrophic preparation supplying bioactive peptides that mimic endogenous neurotrophic factors. t½ ~2-3 hours (estimated from analog peptide preparations) 18 PubMed View Profile ](/compound/cortexin)[ ### NA-Semax Nootropic Peptide Preclinical NA-Semax is the N-acetyl-l-aspartyl variant of Semax — the original ACTH(4-7) Pro-Gly-Pro analog developed at the Russian Academy of Sciences in the 1990s. t½ ~20-30 minutes (intranasal, estimated from analog data) 3 PubMed View Profile ](/compound/na-semax)[ ### P-21 Nootropic Peptide Preclinical P-21 is a synthetic cyclic dipeptide — Cyclo(L-prolyl-glycine) — derived from the Selank/Semax C-terminal Pro-Gly-Pro motif. t½ Not formally characterized in published work. P021 has only been studied in rodents (oral/dietary and subcutaneous dosing); no human pharmacokinetic data exist. 4 PubMed View Profile ](/compound/p21) [ View Full Dosage Guide → Protocols, calculator & safety for NA-Semax Amidate ](/guides/dosage/na-semax-amidate) ### Related Articles [All Posts](/blog) [ #### The Best Peptide Nasal Sprays of 2026, Ranked by Evidence An evidence-tiered review of 10 peptide nasal sprays. S tier: Semax, Selank, oxytocin. A tier: PT-141, DSIP, Epithalon. B tier: Noopept, NAD+, 5-Amino-1MQ. C tier: Melanotan-II. It covers human-trial counts, PMID citations, safety, and pre-made vs DIY tradeoffs. 4/21/2026 ](/blog/best-peptide-nasal-sprays-2026) ### Research Score 60 2 PubMed results ### Quality Indicators Data Completeness 75% Description Mechanism of Action Chemical Data Dosing Protocols Safety Profile PubMed Results Interactions Vendor Listings Research Volume 2 PubMed results Limited research available ### Quick Facts Half-Life ~30-45 minutes (estimated, longer than standard Semax) Molecular Weight ~855.0 g/mol (C39H54N10O10S; monoisotopic ~854.4) Trial Phase Preclinical ### Safety Profile Low Risk Common Side Effects - • Mild nasal irritation Stop Use If - Pregnancy/lactation - Mania - Peptide allergy [Full Dosage Guide](/guides/dosage/na-semax-amidate)[Calculate Your Dose](/tools/reconstitution) Research Disclaimer This information is for educational and research purposes only. Not intended as medical advice. Consult a healthcare professional before use. ## Frequently Asked Questions What is NA-Semax Amidate used for in research? NA-Semax Amidate is the **C-terminally amidated [NA-Semax](/compound/na-semax)** — the carboxylic acid at the peptide's C-terminus is replaced with an amide group (-NH2), which is reported to further extend metabolic half-life by resisting carboxypeptidase cleavage in addition to the aminopeptidase resistance the N-acetyl group already provides. The practical effect is a peptide with **dosing-frequency use**: where standard Semax often requires 3-4 daily doses to maintain effect, NA-Semax Amidate is reported (in vendor monographs and community usage) to maintain subjective effects on a 1-2x daily schedule. Direct pharmacokinetic comparisons in peer-reviewed literature remain absent — this framing is honest about the evidence base. What forms does NA-Semax Amidate come in? NA-Semax Amidate is available in vials, capsules, and sprays forms. How much does NA-Semax Amidate cost? Pricing varies by vendor and form. How do I compare NA-Semax Amidate vendors? Compare prices, payment methods, shipping, and COA scores across 0 vendors. ## Research Tools [ ### Peptide Calculator Reconstitution & syringe units ](/tools/reconstitution)[ ### Reconstitution Guide How to mix, step by step ](/guides/how-to-reconstitute-peptides)[ ### Nasal Spray Calc mL per actuation ](/tools/intranasal)[ ### Half-Life Visualizer Decay curves ](/tools/halflife) ## Related Compounds [View All](/wiki) [ ### Adalank Nootropic Peptide Preclinical / Research compound Adalank is a hybrid research peptide combining structural elements of Adamax (the adamantyl-modified Semax analog) and Selank (the anxiolytic Pro-Gly-Pro tuftsin analog). t½ The commonly cited ~72-hour "functional duration" is an unverified community/vendor claim, not a measured value - no pharmacokinetic study of Adalank has ever been run. The figure is extrapolated from parent Adamax marketing claims. Actual serum half-life is unknown; there is no published PK data. 200-1200 mcg per dose (intranasal or subcutaneous), 1-2x daily Preclinical View Profile ](/compound/adalank)[ ### Adamax Nootropic Peptide Preclinical / Research compound Adamax is a synthetic nonapeptide (Ac-MEHFPGPAG-NH2) classified as a designer analog of Semax. t½ No pharmacokinetic data. Community reports describe a subjectively long duration of effect (~2-3 days), supporting every-other-day or 3x/week dosing; serum half-life not characterized. 500-2000 mcg subcutaneous (community research dosing) Preclinical View Profile ](/compound/adamax)[ ### Cerebrolysin Nootropic Peptide Clinical Cerebrolysin is a porcine brain-derived peptide complex developed by EVER Neuro Pharma (Austria) — a low-molecular-weight neurotrophic preparation containing a mixture of free amino acids and bioactive peptides extracted from purified pig brain proteins. t½ ~2-4 hours (multi-component peptide mix) 85 PubMed View Profile ](/compound/cerebrolysin)[ ### Cortexin Nootropic Peptide Marketed in Russia/CIS (Geropharm); human clinical use with limited-quality evidence (small, mostly Russian-language studies; no Western RCT; not FDA/EMA approved) Cortexin is a purified peptide preparation extracted from cattle and pig cerebral cortex tissue — a low-molecular-weight neuropeptide complex used clinically in Russia and Eastern Europe for cognitive impairment, post-stroke recovery, encephalopathy, attention disorders, and pediatric developmental conditions. Like Cerebrolysin, Cortexin is positioned as a broad-spectrum neurotrophic preparation supplying bioactive peptides that mimic endogenous neurotrophic factors. t½ ~2-3 hours (estimated from analog peptide preparations) 18 PubMed View Profile ](/compound/cortexin)[ ### NA-Semax Nootropic Peptide Preclinical NA-Semax is the N-acetyl-l-aspartyl variant of Semax — the original ACTH(4-7) Pro-Gly-Pro analog developed at the Russian Academy of Sciences in the 1990s. t½ ~20-30 minutes (intranasal, estimated from analog data) 3 PubMed View Profile ](/compound/na-semax)[ ### P-21 Nootropic Peptide Preclinical P-21 is a synthetic cyclic dipeptide — Cyclo(L-prolyl-glycine) — derived from the Selank/Semax C-terminal Pro-Gly-Pro motif. t½ Not formally characterized in published work. P021 has only been studied in rodents (oral/dietary and subcutaneous dosing); no human pharmacokinetic data exist. 4 PubMed View Profile ](/compound/p21) Free 2026 Peptide Cheat Sheet — 50 pages, PDF Reconstitution math, concentration charts, half-lives, and vendor trust tiers. The reference we wish we had on day one. [Download Free](/guides/peptide-cheat-sheet-download?utm_source=compound-na-semax-amidate) ### Need bloodwork before starting? Full hormone + metabolic panels from Anabolic Insights. Code CHONCH for first-order discount. [Order Bloodwork](https://anabolicinsights.ai/?ref=nwm2zjb) ![BodyHackGuide](/assets/bodyhackguide-logo-DOzZNUyh.webp) ### BodyHackGuide Your biohacking research hub — compound pricing, brain health protocols, dosing tools, and vendor reviews. 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