Peptide library / Brain & sleep / Cortexin
Cortexin
A polypeptide extract from calf brain cortex used in Russia after brain injury and in children with delays.
Effects studied or claimed
What it is used or promoted for, and where each effect has actually been seen
- Recovery after traumatic brain injurySmall human studies
- Neurodevelopmental delay in childrenSmall human studies
How it is thought to work
Cortexin is a mixture of small peptides said to have neuroprotective and antioxidant effects, though its active components are not defined.
What the evidence shows
Evidence is largely from Russian open-label studies.
Safety and unknowns
Allergic reactions are possible because it is derived from animal tissue.
Regulatory status
Registered in Russia. Not approved elsewhere.
Regulatory status changes quickly. This entry was last reviewed on 27 October 2026. Confirm current status with the FDA before relying on it.
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General information, not medical advice. Do not buy or inject unregulated peptides.