Cortexin vs GHK-Cu (Copper Peptide)

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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GHK-Cu (Copper Peptide)

GHK-Cu is a naturally occurring copper peptide found in human plasma, saliva, and urine. It plays important roles in wound healing, tissue repair, and has shown anti-aging properties in research.

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Side-by-Side Comparison

Aspect	Cortexin	GHK-Cu (Copper Peptide)
Dose Range	10 mg–20 mg	1 mg–2 mg
Frequency	1x daily	1x daily
Cycle Length	1–2 weeks	4–8 weeks
Route	intramuscular	subcutaneous
Mechanism	Contains a mixture of neuropeptides and amino acids that support neuronal metabolism, provide neuroprotection, and enhance synaptic transmission. Specific mechanisms not fully characterized.	Attracts immune cells and fibroblasts to wound sites, stimulates collagen and glycosaminoglycan synthesis, promotes angiogenesis, and has antioxidant effects. Modulates gene expression related to tissue repair.
Typical Dosage	Clinical protocols: 10mg intramuscularly once daily for 10-20 days. May be repeated after 3-6 month interval.	Topical: Applied as serum or cream 1-2 times daily. Injectable: 1-2mg daily for research purposes. Microneedling protocols often use 0.5-1%.
Administration	Intramuscular injection. Comes as lyophilized powder requiring reconstitution. Treatment given in courses rather than continuously.	Most commonly used topically for skin applications. Can be injected subcutaneously for systemic effects. Often combined with microneedling for enhanced skin penetration.
Side Effects	Generally well-tolerated. May cause injection site reactions or mild allergic responses in sensitive individuals.	Topical use is generally well-tolerated. May cause temporary skin irritation or redness in sensitive individuals. Injectable use may cause injection site reactions.
Best For	Recovery & Healing Cognitive Performance	Recovery & Healing