Cortexin vs Noopept

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

Cortexin

Cortexin is a polypeptide complex derived from pig brain cortex, used clinically in Russia and Eastern Europe for neurological conditions including stroke recovery, traumatic brain injury, and cognitive decline.

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Noopept

Noopept (N-phenylacetyl-L-prolylglycine ethyl ester) is a peptide-derived nootropic developed in Russia. While technically a dipeptide prodrug rather than a true peptide, it's often discussed alongside peptide nootropics.

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Side-by-Side Comparison

Aspect	Cortexin	Noopept
Dose Range	10 mg–20 mg	10 mg–30 mg
Frequency	1x daily	2x daily
Cycle Length	1–2 weeks	4–6 weeks
Route	intramuscular	oral
Mechanism	Contains a mixture of neuropeptides and amino acids that support neuronal metabolism, provide neuroprotection, and enhance synaptic transmission. Specific mechanisms not fully characterized.	Metabolized to cycloprolylglycine which modulates AMPA and NMDA receptors, increases NGF and BDNF expression, and provides neuroprotective effects through antioxidant mechanisms.
Typical Dosage	Clinical protocols: 10mg intramuscularly once daily for 10-20 days. May be repeated after 3-6 month interval.	Oral: 10-30mg daily, typically divided into 2-3 doses. Sublingual use may enhance absorption. Some users go higher but effects may plateau.
Administration	Intramuscular injection. Comes as lyophilized powder requiring reconstitution. Treatment given in courses rather than continuously.	Oral or sublingual administration. Unlike most peptides, it's orally bioavailable. Can be taken with or without food.
Side Effects	Generally well-tolerated. May cause injection site reactions or mild allergic responses in sensitive individuals.	Headache (often from choline depletion), irritability, insomnia if taken late, and occasional brain fog during initial use.
Best For	Recovery & Healing Cognitive Performance	Cognitive Performance