Cortexin vs Sermorelin
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.
Full details →Sermorelin
Sermorelin is a synthetic analog of GHRH consisting of the first 29 amino acids of the natural hormone. It was previously FDA-approved for GH deficiency diagnosis and treatment in children.
Full details →Side-by-Side Comparison
| Aspect | Cortexin | Sermorelin |
|---|---|---|
| Dose Range | 10 mg–20 mg | 100 mcg–300 mcg |
| Frequency | 1x daily | 1x daily |
| Cycle Length | 1–2 weeks | 8–12 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. | Binds to GHRH receptors in the pituitary gland to stimulate natural GH production and release. Maintains the body's natural feedback mechanisms for GH regulation. |
| Typical Dosage | Clinical protocols: 10mg intramuscularly once daily for 10-20 days. May be repeated after 3-6 month interval. | Typical dosing: 200-500mcg administered once daily, usually before bed. Some protocols use twice daily dosing. |
| Administration | Intramuscular injection. Comes as lyophilized powder requiring reconstitution. Treatment given in courses rather than continuously. | Subcutaneous injection, preferably at bedtime to work with natural GH release patterns. Can be combined with GHRPs for synergistic effects. |
| Side Effects | Generally well-tolerated. May cause injection site reactions or mild allergic responses in sensitive individuals. | Generally well-tolerated. May cause injection site reactions, headache, flushing, or dizziness. Less side effects than direct GH administration. |
| Best For |
What They Have in Common
Cortexin, Sermorelin are both commonly used for:
Key Differences
Unique to Cortexin:
Unique to Sermorelin:
Which Has Stronger Evidence?
| Goal | Cortexin | Sermorelin |
|---|---|---|
| Recovery & Healing | medium | medium |
Key Studies
Cortexin
- [Cortexin in the comprehensive therapy of alcoholic encephalopathy].
Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova, 2026
- Cortexin modulates OPG/RANK/RANKL and TRPC1 expression in cerebral ischemia-reperfusion injury.
Neurological research, 2026
- Neurotropic Effects of Cortexin on Models of Mental and Physical Developmental Delay.
Biomedicines, 2025
Sermorelin
- A potentially effective drug for patients with recurrent glioma: sermorelin.
Annals of translational medicine, 2021
- Sermorelin: a better approach to management of adult-onset growth hormone insufficiency?
Clinical interventions in aging, 2006
- Sermorelin: a review of its use in the diagnosis and treatment of children with idiopathic growth hormone deficiency.
BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy, 1999
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