Cortexin (Cortexin (Polypeptide Brain Extract))
A mixture of low-molecular-weight neuropeptides derived from cattle/pig cerebral cortex, used in some countries for neuroprotection, recovery after stroke or brain injury, and cognitive support.
How it works
Provides a blend of neuropeptides and neurotrophic factors thought to support neuronal metabolism, reduce oxidative stress, balance excitatory/inhibitory neurotransmission, and promote neuroprotection and repair.
Key facts
- Molecular weight: Mixture (peptides <10 kDa)
- Half-life: Varies by component
- Bioavailability: Intramuscular injection
- Storage: Lyophilized: refrigerate. Reconstituted: use promptly per label.
Dosing overview
- Typical dose: ~10 mg per day (course-based)
- Frequency: Once daily
- Duration: 10-day courses, repeatable
- Route: Intramuscular injection
Protocol notes
- Typically administered as a ~10-day course of once-daily intramuscular injections.
- Courses may be repeated a few times per year.
- Used in some regions for recovery after brain injury or for cognitive support.
Reported benefits
- Neuroprotection
- Cognitive and memory support
- Used in stroke/TBI recovery (regional clinical use)
- Antioxidant effects
Possible side effects
- Injection site reactions
- Allergic reaction (animal-derived)
- Limited Western clinical data
Research
- Cortexin in cognitive recovery (2017): Reported improvements in cognitive recovery after ischemic stroke in regional clinical studies.
Community reviews of Cortexin
- bloodwork_brett rated it 4/5 - Worth adding to the protocol: Cortexin has been a worthwhile addition. I am data-driven and tracked relevant markers before, during, and after. The improvement is measurable and correlates with the intervention timeline. What sets this apart from some compounds I have tried is the consistency. Benefits did not fluctuate wildly or disappear. They built up and maintained. That gives me confidence in the mechanism. Tolerance has been excellent. Nothing in my bloodwork or subjective experience raised any flags. This is the kind of compound that does its job quietly without causing problems. Exactly what you want.
- titrate_tina rated it 5/5 - Genuinely effective after 6 months: Been using Cortexin for about 6 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- vial_vault_vicky rated it 4/5 - Noticed clear benefits within weeks: Added Cortexin to my protocol about 1 month ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
- steady_state_stan rated it 4/5 - Solid compound with real results: Been using Cortexin for about 2 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
Compare Cortexin
Community discussions about Cortexin
- My first Cortexin course for post‑stroke memory support - 4 comments
- Ask the community about Cortexin
Research and educational reference only. Not medical advice.