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Cortagen
Last reviewed: July 13, 2026 by The Peptide Catalog Team
A Khavinson cerebral-cortex tetrapeptide (Ala-Glu-Asp-Pro / AEDP) studied in small animal models for nerve regeneration and CNS support; preclinical only. Cortagen is a cerebral-cortex peptide bioregulator from the Russian cytomedin class, studied for neuroprotection and CNS support.
Overview
Core Benefits
Key AdvantagesThese are educational summaries of commonly discussed effects in wellness/regenerative contexts, not guarantees.
Cortagen Results Timeline
ProgressionTimeline is illustrative and non-guaranteed. Outcomes vary and are commonly discussed alongside training, nutrition, sleep, and cycling practices.
How It WorksShort-Peptide Bioregulator — Cortex / Neuro (Preclinical Evidence Only)
Target → Signal → Effect → Outcomes
Neural Tissue / Gene Promoters (proposed)
Cortagen is the tetrapeptide Ala-Glu-Asp-Pro (AEDP), the synthetic analog of the cerebral-cortex extract Cortexin, from the Khavinson bioregulator program. The shared hypothesis is that this short peptide enters cells and modulates tissue-specific gene expression — modeled in the group's in-vitro work, not confirmed in humans.
Nerve/Cortex Tissue Responses (animal/in-vitro)
In rat studies, Cortagen was associated with improved sciatic-nerve regeneration; in explant culture it stimulated cortex-tissue growth. These are the originating group's animal and cell findings, framed as a proposed tissue-specific signal, not a validated human pathway.
Neuroprotection (Animal Models)
The whole-organism data is rodent nerve-regeneration and older cortex studies. There is no human systemic-outcome data, and human clinical data (where it exists) belongs to the Cortexin extract, not this synthetic peptide.
Unknown in Humans
There is no human evidence to predict a subjective effect. Reported effects were animal and cellular. "No perceptible change" is consistent with the absence of human efficacy data.
What Makes This Peptide Different
Cortagen is a research tetrapeptide (AEDP) from the Khavinson framework, the synthetic short analog of the Cortexin brain extract. Its interest is the proposed tissue-specific gene-expression mechanism — backed by small single-group animal/in-vitro work, with no human trials, FDA evaluation, or established dose.
Cortagen Vendors
Dosing ProtocolNeuroprotection / Nerve Support (Research / No Human Data)
Educational reference only. Individual responses vary. Consult healthcare provider before use.
Why This Dosing Protocol
Why short courses? Mirrors the short-pulse administration of Khavinson bioregulators in preclinical work — convention by analogy, not a tested Cortagen protocol.
Reconstitution Calculator
Dilution math and unit conversions. Prefilled using a common vial size for this peptide.
Open calculatorStorage & Handling
Storage at a glance
Proper storage temperatures, shelf life, reconstitution best practices, and travel tips for lyophilized and reconstituted peptides.
Handling specifics
Educational overview on storage, labeling, and traceability considerations for lab environments. Consult primary literature and vendor documentation for specifics.
- Freezer (-20°C): 1+ year
- Refrigerator (2-8°C): 1-3 months
- Room temperature: 2-3 weeks (emergency only)
- MUST refrigerate at 2-8°C
- 4-week maximum shelf life
- NEVER freeze after reconstitution
- Use bacteriostatic water for multi-dose
FAQ
What is Cortagen?
Cortagen is a synthetic cerebral-cortex tetrapeptide — Ala-Glu-Asp-Pro, or AEDP — from the Russian Khavinson "peptide bioregulator" program, the synthetic analog of the Cortexin tissue extract. It is marketed for nerve and brain support. Small older animal studies reported effects on sciatic-nerve regeneration and cortex-tissue growth. There are no human clinical trials and no FDA evaluation.
How strong is the evidence behind Cortagen?
Weak. The published work is a small set of older single-laboratory animal and cell-culture studies from the Khavinson group; there are no Western randomized trials and no independent replication. The proposed gene-expression mechanism is a hypothesis. It is sold as a research chemical, not for human consumption.
Is Cortagen the same as Cortexin?
No. Cortexin is the natural brain-cortex peptide extract; Cortagen is the synthetic short tetrapeptide (AEDP) developed to reproduce part of that activity. The human clinical data that exists belongs to the extract, not to the synthetic research-chemical form.
How long does reconstituted peptide last?
Once mixed with bacteriostatic water, peptides remain stable for up to 4 weeks when refrigerated at 2-8°C (36-46°F). Unopened powder can last 1+ year in the freezer. Get our complete Storage & Travel Guide.
Is this peptide legal to purchase?
Peptides sold "for research purposes only" are legal to purchase in the US, but are not FDA-approved for human use outside of specific medical applications. Always consult a healthcare provider before use.
New to peptides?
Take our Peptide Match tool to find the best peptide for your goals. You can also read our Complete Guide to Peptides to learn the basics.
Cortagen Research Articles
Cortagen Dosage Chart: 10-20 Day Course Protocol
A synthetic cortex tetrapeptide with no validated human dose. What research-chem sources report for short courses, plus the extract-vs-synthetic caveat.
side-effectsCortagen Side Effects: What the Evidence Shows
Its originators claim near-zero side effects, but independent safety data barely exists. What the research shows — and the risks it leaves out.
resultsCortagen Results: Week-by-Week Timeline
Cortagen has no human efficacy trials — so what drives the reported timelines? Preclinical nerve data and labeled community reports, week by week.
reconstitutionCortagen Reconstitution: 20mg Vial Mixing Chart
Cortagen has no validated human concentration. See how community resources describe mixing the 20mg vial, plus syringe-unit math and storage limits.
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