GHK-Cu (Copper Peptide) vs MGF (Mechano Growth Factor)
A detailed comparison to help you understand the differences and choose the right peptide for your research goals.
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.
Full details →MGF (Mechano Growth Factor)
MGF (Mechano Growth Factor) is a splice variant of IGF-1 that is produced locally in muscle tissue in response to mechanical stress. The non-PEGylated form has a very short half-life.
Full details →Side-by-Side Comparison
| Aspect | GHK-Cu (Copper Peptide) | MGF (Mechano Growth Factor) |
|---|---|---|
| Dose Range | 1 mg–2 mg | 400 mcg–1.2 mg |
| Frequency | 1x daily | Less than daily |
| Cycle Length | 4–8 weeks | 4–6 weeks |
| Route | subcutaneous | intramuscular |
| Mechanism | 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. | Activates muscle satellite cells (stem cells) and promotes their proliferation without differentiation, priming them for fusion with existing muscle fibers during repair and growth. |
| Typical Dosage | Topical: Applied as serum or cream 1-2 times daily. Injectable: 1-2mg daily for research purposes. Microneedling protocols often use 0.5-1%. | Due to extremely short half-life (minutes), typical protocols use 100-200mcg injected directly into target muscles immediately post-workout. |
| Administration | Most commonly used topically for skin applications. Can be injected subcutaneously for systemic effects. Often combined with microneedling for enhanced skin penetration. | Intramuscular injection into trained muscles within minutes of workout completion. Must be used immediately after reconstitution due to instability. |
| Side Effects | Topical use is generally well-tolerated. May cause temporary skin irritation or redness in sensitive individuals. Injectable use may cause injection site reactions. | Injection site soreness, potential hypoglycemia, localized swelling. Short half-life limits systemic effects. |
| Best For |
What They Have in Common
GHK-Cu (Copper Peptide), MGF (Mechano Growth Factor) are both commonly used for:
Key Differences
Unique to MGF (Mechano Growth Factor):
Which Has Stronger Evidence?
- Recovery & Healing: GHK-Cu (Copper Peptide) has stronger research support.
| Goal | GHK-Cu (Copper Peptide) | MGF (Mechano Growth Factor) |
|---|---|---|
| Recovery & Healing | high | medium |
Key Studies
GHK-Cu (Copper Peptide)
- Middle-aged mice treated with GHK-Cu peptide administered intraperitoneally or intranasally show behavioral rescue but divergent hippocampal aging programs.
Research square, 2026
- Glycyl-L-histidyl-L-lysine-Cu2(+) (GHK-Cu) Attenuates CuSO(4) or LPS induced-inflammation in Zebrafish larvae model.
European journal of pharmacology, 2026
- The Regenerative Potential of GHK-Cu in Aesthetic Medicine.
Aesthetic surgery journal, 2026
MGF (Mechano Growth Factor)
- The role of mechano growth factor in chondrocytes and cartilage defects: a concise review.
Acta biochimica et biophysica Sinica, 2023
- Pretreatment with mechano growth factor E peptide attenuates osteoarthritis through improving cell proliferation and extracellular matrix synthesis in chondrocytes under severe hypoxia.
International immunopharmacology, 2021
- Mechano growth factor interacts with nucleolin to protect against cisplatin-induced neurotoxicity.
Experimental neurology, 2020
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