Cortexin vs GHK-Cu
Overview
Cortexin is primarily a sleep & recovery peptide, while GHK-Cu is used for pain management.
This page compares Cortexin and GHK-Cu across their primary use, typical dosing, reported benefits and side effects, and U.S. regulatory status. For the full monograph on either compound — mechanism of action, clinical research, and references — follow the article links.
Side-by-side comparison
| Cortexin | GHK-Cu | |
|---|---|---|
| Category | Sleep & Recovery | Pain Management |
| Regulatory status (US) | Research use only | Compounding (Rx) — Apr 2026 |
| Typical dosage | 10 mg | 1-3 mg |
| Frequency | evening | daily |
| Reported benefits | Enhanced sleep quality, neural recovery, stress reduction | Pain reduction through healing, anti-inflammatory, tissue regeneration |
| Reported side effects | Generally well-tolerated | Minimal side effects |
Key differences
Primary use. Cortexin is categorised under Sleep & Recovery, while GHK-Cu falls under Pain Management. Their differing categories mean they are usually chosen for different goals rather than as direct substitutes.
Regulatory status. Cortexin: not FDA-approved; treated as a research compound. GHK-Cu: not FDA-approved; compounding permitted with a prescription as of April 2026.
Dosing. Cortexin is typically dosed at 10 mg (evening). GHK-Cu is typically dosed at 1-3 mg (daily).
Can you stack them?
Some protocols combine peptides, but stacking Cortexin and GHK-Cu has not been validated for safety or efficacy in controlled trials. Combining compounds can change their effects and risks. Nothing here is medical advice — consult a qualified healthcare provider before starting or combining any protocol.
Frequently asked questions
- What is the difference between Cortexin and GHK-Cu?
- Cortexin is primarily a sleep & recovery peptide, while GHK-Cu is used for pain management. Cortexin is not FDA-approved; generally classified as a research compound, whereas GHK-Cu is not FDA-approved; compounding permitted with a prescription (as of April 2026).
- What is Cortexin used for?
- Neuropeptide for rest.
- What is GHK-Cu used for?
- Anti-inflammatory tissue repair.
- Can you take Cortexin and GHK-Cu together?
- Some users combine peptides within a single protocol, but stacking Cortexin and GHK-Cu has not been established as safe or effective in controlled trials. Neither this comparison nor PeptideSciences101 is medical advice — consult a qualified healthcare provider before combining any compounds.
- Is Cortexin or GHK-Cu FDA-approved?
- Cortexin is not FDA-approved; generally classified as a research compound. GHK-Cu is not FDA-approved; compounding permitted with a prescription (as of April 2026).