Cortagen

Cortagen is a Khavinson tetrapeptide studied for neuroprotection, neural regeneration, and gene-expression modulation in nervous-system tissue.

Profile · 01

Overview

Cortagen (Ala-Glu-Asp-Pro) is a synthetic tetrapeptide derived from amino-acid analysis of the natural cortex preparation Cortexin and is discussed within the Khavinson bioregulator framework. It is not FDA-approved for any indication.

Preclinical literature describes neuroprotective, regenerative, and epigenetic or gene-expression-modulating effects, but large human controlled trials are not available. This page presents the supplied once-daily subcutaneous protocol as educational content.

At a Glance

Goal
Support neural regeneration, neuroprotection, and cognitive recovery
Categories
NeuroprotectionCognitive SupportCellular RepairBioregulator
Synergistic
Cortexin · Pinealon · Epitalon · Semax
Profile · 02

Protocol

Suggested once-daily protocol with a two-week ramp to the full dose.

Reconstitute
Add 3.0 mL bacteriostatic water to a 20 mg vial for about 6.67 mg/mL concentration
Typical daily range
1-2 mg once daily
Start
1 mg daily for Weeks 1-2
Target
2 mg daily for Weeks 3-4
Frequency
Once per day (subcutaneous)
Cycle Length
4 weeks standard; optional extension to 8 weeks
Timing
Morning administration is commonly preferred
Route
Subcutaneous
Cycle
4 weeks on, 4 weeks off

Inject once daily subcutaneously using the 3.0 mL dilution to keep measurements practical on an insulin syringe. The evidence base is primarily preclinical and observational, with nerve-regeneration and neuroprotective outcomes discussed more strongly than broad human efficacy claims.

Dose progression

Weeks 1-2
1 mg · 15 units (0.15 mL)
Weeks 3-4
2 mg · 30 units (0.30 mL)

Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.

Science · 01

How Cortagen works.

Cortagen is described as a gene-expression-modulating and epigenetic bioregulator peptide derived from cortex tissue analysis. The literature highlights neurotrophic-factor support, oxidative-stress reduction, and accelerated peripheral nerve regeneration in preclinical models.

Animal work in ischemia and nerve-injury models is the main support base. Human evidence is more limited and does not match the depth of the mechanistic discussion.

Science · 02

Effects

Observations from clinical or preclinical literature.

Preclinical models support peripheral nerve regeneration and improved conduction markers
May support neuroprotection by reducing oxidative-stress signaling
May support cognitive recovery and neuronal resilience through neurotrophic mechanisms
Generally described as well tolerated in early research settings
Mild injection-site reactions such as redness or itching may occur
Long-term human safety and efficacy remain uncertain
Science · 03

Caution

Use caution in active cancer or major cancer history because gene-expression modulation is part of the mechanism discussion
Not recommended during pregnancy or breastfeeding because safety data is insufficient
Use caution with medications that strongly affect the central nervous system
Consult a qualified healthcare provider before use if you have chronic neurologic or other medical conditions

Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.

Lifestyle · 01

CoFactors

Omega-3 fatty acids
Support neuronal membrane integrity and anti-inflammatory signaling.
B vitamins
Support methylation, nerve function, and broader cognitive health.
Magnesium
Supports synaptic signaling and neuronal function.
Vitamin D
Relevant to broader neuroprotective and immune-modulating pathways.
Lifestyle · 02

Life Factors

Complementary strategies for best outcomes.

Maintain a nutrient-rich diet with adequate protein and neuro-supportive micronutrients
Use regular physical activity and cognitive exercise to reinforce neuroplasticity goals
Prioritize quality sleep and stress management to support neural repair
Use clinician-guided rehab strategies where a neurologic condition is part of the context
Lifestyle · 03

Metrics

Day-to-day metrics worth tracking through the protocol.

  1. Cognitive performance - track memory, focus, and processing speed trends
  2. Sleep quality and duration - useful for neurorecovery tracking
  3. Mood and stress resilience - monitor subjective changes over the cycle
  4. Injection-site reactions - note redness, swelling, or discomfort
Lifestyle · 04

Labs

Baseline and periodic bloodwork to monitor systemic health during the protocol.

CRP (C-Reactive Protein)
General inflammatory marker that may provide broader context.
CBC (Complete Blood Count)
General monitoring and baseline screening.
CMP (Comprehensive Metabolic Panel)
Assesses liver and kidney function during peptide use.
Vitamin D, B12, and folate
Useful cofactor status markers for neurologic support.
Calculators · 01

Supplies Calculator

Estimates assume the schedule defined for this peptide.

Length
Vial size
Bac. water
Syringe
Vials
0 × 20 mg each…
Syringes
0
Bac. water
0 mL
Swabs
02 per syringe
Calculators · 02

Dose Calculator

Dose Calculator

Vial
Bac. water
Syringe
Dose
Concentration
0mg/mL
Volume per dose
0mL
…
Practice · 01

Preparation

Careful technique preserves potency. Solution should be clear — do not shake.

  1. Allow vial to reach room temperature for 15–20 minutes before reconstitution.
  2. Draw the chosen bacteriostatic water volume with a sterile syringe.
  3. Inject slowly down vial wall; avoid foaming.
  4. Gently swirl/roll until dissolved (do not shake).
  5. Label with reconstitution date and refrigerate at 2–8 °C (35.6–46.4 °F), protected from light.
  6. Use within 30 days; discard any unused solution after 30 days.
Practice · 02

Technique

General subcutaneous guidance from clinical best-practice resources.

Clean the vial stopper and injection site with alcohol and allow them to dry
Pinch a skinfold and insert the needle at 45-90 degrees into subcutaneous tissue
Do not aspirate for subcutaneous injections; inject slowly and steadily
Rotate sites systematically across the abdomen, thighs, and upper arms
Discard used syringes immediately in a sharps container

Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.

Practice · 03

Storage

Lyophilized
Store at room temp in dry, dark conditions; minimize moisture exposure.
Reconstituted
Refrigerate at 2–8 °C (35.6–46.4 °F); avoid freeze–thaw cycles. Discard reconstituted vials after 30 days.

Notes

Allow vials to reach room temperature before opening to reduce condensation uptake.
Reference · 01

Notes

Use a new sterile insulin syringe for each injection and dispose of it safely
Morning administration is commonly favored in the supplied protocol
Document dose, timing, and cognitive or neurologic response trends for consistency
Human evidence is preliminary compared with the preclinical literature
PepTribe is an educational platform. This information is for research and learning purposes only and is not medical advice.
Reference · 02

References

  1. PubMed
    Sciatic-nerve regeneration literature involving Cortagen.
    https://pubmed.ncbi.nlm.nih.gov/11276314/
  2. PubMed
    Cortexin and Cortagen work in chronic cerebral ischemia.
    https://pubmed.ncbi.nlm.nih.gov/21476278/
  3. Neuroendocrinology Letters / PubMed
    Gene-expression work involving Cortagen in tissue models.
    https://pubmed.ncbi.nlm.nih.gov/15159690/
  4. Molecules (MDPI)
    Systematic review context for peptide regulation of gene expression.
    https://www.mdpi.com/1420-3049/26/22/7053
  5. CDC
    Subcutaneous injection route guidance.
    https://www.cdc.gov/vaccines/hcp/admin/downloads/YCTS-VaxAdmin-Subcut-injection.pdf
  6. WHO (NCBI Bookshelf)
    Injection-safety guidance for subcutaneous administration.
    https://www.ncbi.nlm.nih.gov/books/NBK390474/
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