Cortexin
Brain Peptide Complex · Neuropeptide Preparation · Кортексин
Cortexin is a CIS pharmaceutical cortical polypeptide extract used in neurology wards. It is adjacent to the 41, not padded into it. Cerluten is the Cytomax complex; Cortagen is AEDP.
Use-case scores
0–10 against the evidence we have, not a gym ranking. Hidden domains do not apply here.
- Cognition3/10
Extract, not a sequence. Russian clinical literature. Not Cerebrolysin (that is a different extract leaf). Not a US stroke drug.
Compound card
- Class
- Porcine brain polypeptide extract (Russian clinic product class)
- Formula
- Bovine cortex polypeptide mixture (<10 kDa)
- Status
- Not FDA-approved · research use
How it works
Cortexin is a polypeptide preparation derived from the cerebral cortex of cattle (analogous to Cerebrolysin but bovine-cortex source). It contains a complex mixture of low-molecular-weight neuropeptides and amino acids that provide neurotrophic factor signaling (BDNF, NGF, CNTF analogs) and neuroprotection.
Cortexin promotes neurogenesis, synaptogenesis, and recovery from ischemic neurological injury. It is approved in Russia and several Eastern European countries for stroke recovery, TBI, cognitive decline, and childhood neuro-developmental disorders. Its primary therapeutic difference from Cerebrolysin is the bovine cortex source (vs. porcine brain for Cerebrolysin) and its availability in Russia.
Source: PMID: 17436040
Khavinson map
Adjacent (not padded into the 41)Used in bioregulator stacks
Manufacturer-style organ combinations - not FDA protocols. Every name is a live leaf.
The Khavinson school
Vladimir Khatskelevich Khavinson (1946–2024) spent five decades at what became the St. Petersburg Institute of Bioregulation and Gerontology arguing a simple, stubborn idea: aging is, in part, a failure of tissue-specific peptide signals, and those signals can be restored. The first products were not “peptides” in the Instagram sense. They were Cytamins - polypeptide fractions isolated from a named organ of young animals. Later commercial refinements of those fractions are sold as Cytomaxes (Cytomed / NPCRIZ): still mixtures, still oral capsules, still defined by the source organ rather than a single sequence. When the group identified short active motifs inside those mixtures, they synthesized them as Cytogens - di-, tri-, and tetrapeptides with a one-letter code (KE, AEDG, KED, EDR, KEDP, and so on).
That three-layer stack is the whole map. Cytamin / pharmaceutical extracts (Thymalin, Epithalamin, Cortexin, Retinalamin, Prostatilen) are the clinic-era injectables registered in the former Soviet pharmacopeia. Cytomaxes are the capsule complexes Cytomed still lists as a 21-SKU organ line. Cytogens are the defined synthetics. English-language educators, including Brenden Henry’s public writing at Peptide Science Institute, add a further commercial distinction - later analog SKUs (N-acetyl, amidate, “V2” complexes) sold as more stable or more diverse than the original Cytomed lots. That last layer is a product taxonomy, not a Khavinson paper. We describe it so readers are not gaslit by three bottles with the same organ name. We do not reproduce paid Peptide Mastery protocols, Precision Cell Method language, or anyone else’s course IP.
Full Cytamin → Cytomax → Cytogen map, literature limits, and how we counted 41
The mechanism Khavinson published is epigenetic, not receptor-agonist in the GLP-1 sense. Short peptides are claimed to enter nuclei, interact with DNA/histones, and reopen tissue-specific transcription that condensed with age (heterochromatin → euchromatin). Reviews in the Bulletin of Experimental Biology and Medicine and Neuroendocrinology Letters (PMID 14523363, 15677927, 23888677) are the citable core. Complementary GI pharmacology is not mystical: di- and tripeptides are PEPT1/LAT substrates, which is why oral capsules are even a conversation. What is not established in Western Phase 3 programs is organ-by-organ disease treatment, telomere reversal as a clinical endpoint, or the manufacturer claim that Cytomax is “a third stronger” than Cytogen. Those are NPCRIZ marketing sentences.
Khavinson’s group published hundreds of papers, many in Russian, many in the same journal family. That is a real literature. It is also a literature with limited independent Western replication, small n, and a habit of using one review PMID as a stamp on every organ. On this site a leaf earns its organ story, its Cytomax↔Cytogen pair, its sequence if it has one, and an honest sentence about what has not been shown. Reconstitution math belongs on cytogens sold as vials. Cytomax capsules do not get a fake 5 mg vial.
The 41 we treat as canonical are the 21 Cytomaxes on the public e-peptide/Cytomed list, the 12 Cytogens on that same commercial line (including Vesilut, which Western catalogs often drop), plus eight historically load-bearing molecules that sit beside the capsule SKUs: Epitalon, Vilon, Thymogen, Livagen, Cortagen, Prostamax, Thymalin, and Epithalamin. Honluten, Cortexin, Retinalamin, Prostatilen, Thymulin, N-acetyl-epitalon-amidate, Pinalex, and the GPL Man / GPL Femme kits are covered as adjacent - same school or same storefront, not padded into a fake 41.
Public English-language teaching (including Brenden Henry at peptidescienceinstitute.com) is cited as context, not copied. Paid Peptide Mastery / Peptide Salvation text stays theirs.
History of this molecule
Hospital ampoules, pediatric and stroke-adjacent CIS use, a real product name doctors in that system know. That is a different object than a US research-chem AEDP vial. We cover it so the map has the extract layer for brain, same as Thymalin for thymus and Retinalamin for retina.
Caveats
Extract. Not FDA. Acute stroke is still emergency care.
Full 41-map: Khavinson bioregulators index · Bioregulator stacks
Research Use Cases
- ✓Stroke rehabilitation (acute and chronic phase)
- ✓Traumatic brain injury recovery
- ✓Age-related cognitive impairment
- ✓Pediatric neurodevelopmental support
- ✓Epilepsy adjunct therapy
Dosing
| Phase | Dose | Frequency | Notes |
|---|---|---|---|
| Standard Protocol | 10 mg | Daily IM for 10 days, repeat 1-2x per year | Khavinson-adjacent cytamine protocol. Intramuscular injection only. Widely used in Russia for neurological indications. |
Administration
Cortexin: CIS IM extract vs Not Cerluten / not AEDP
- Hospital ampoule doctors in that system actually know. Adjacent to the 41, not padded into it.
- Extract layer for brain, same job Thymalin does for thymus.
- Food does not change an IM shot.
- Not FDA. Acute stroke is still emergency care.
- Do not paste Cortagen PMID 19503960 onto this extract, or Cerebrolysin trials onto this brand.
- US research cakes labeled Cortexin are identity-unknown until proven.
- Cerluten exists for people who bought brain Cytomax capsules.
- Keeps extract vs AEDP vs complex from collapsing.
- Not a sublingual tablet. Nobody manufactures this SKU that way.
- Name collision with Cortagen is the buyer trap.
- Not a nootropic gummy and not Semax.
- Pediatric CIS use does not authorize a US capsule protocol.
Timeline
Who it is for
Cognitive Enhancement / Neuroprotection
LowApproved in Russia for cognitive decline and neurology. Limited RCT data vs. Cerebrolysin.
Stroke / TBI Recovery
LowApproved in Russia for neurological rehabilitation. Fewer clinical trials than Cerebrolysin.
Reconstitution
| Vial | Water | Concentration | Example dose |
|---|---|---|---|
| 10 mg lyophilized | 2 mL BAC | 5 mg/mL | Clinic extract kits differ from research cakes. Match the ampoule label. |
Change vial size or water volume? Open the reconstitution calculator.
Safety & Considerations
Approved in Russia. Intramuscular only. Generally well-tolerated. Manufacture must meet veterinary-derived peptide standards. Limited data outside Russia.
Regulatory & Legal Status
Not currently on the WADA 2026 Prohibited List. Policies may change - verify before competition.
Research Chemical
US Compounding: Not eligible / not available
⚠️ This information is for educational purposes only and may not reflect the most current regulatory updates. Always verify with official FDA, WADA, and jurisdiction-specific sources before use.
Limits of current evidence
- Do not paste Cerebrolysin trials onto Cortexin.
- This site will not treat stroke or TBI from this page.
Verdict
Cortexin is a branded porcine cortical extract. Not a synthetic nootropic peptide. Not FDA-approved. Sequence claims on research-chem sites are usually wrong.
Interactions & Contraindications
Animal-derived preparation - potential allergenic risk. IM injection route only. No significant drug interactions documented in Russian clinical data. Can be combined with standard neurological medications.
Synergies & Common Stacks
Cortexin provides broad neuroprotection and membrane stabilization while P21 specifically drives hippocampal neurogenesis - complementary neuroprotective approaches for cognitive decline.
Cortexin (complex neuropeptide preparation, IM injection) + Semax (targeted ACTH fragment, intranasal) provide multi-pathway CNS support through different mechanisms and routes.
Frequently Asked Questions
In the 41?▼
Vs Cortagen?▼
Vs Semax?▼
US hospital drug?▼
IM or capsule?▼
What is the difference between Cortexin and Cerebrolysin?▼
References
- CIS neurology groups / related “Cortexin in clinical neurology (CIS literature).” Neuroscience and Behavioral Physiology / related (2007). PMID: 17436040
- Khavinson VKh et al. “Short peptides stimulate gene expression in aging cerebral cortex.” Bulletin of Experimental Biology and Medicine (2009). PMID: 19503960
- Khachanova NV et al. “"Cortexin in neurological practice: a systematic review".” Zhurnal Nevrologii i Psikhiatrii (2021). PMID: 33580928
Get Cortexin from Vita-Stream - a distributor for Khavinson-line oral capsules. No reconstitution math on a Cytomax bottle.
Affiliate link · Full review