GHK-Cu: Benefits, Dosage & FDA Status
Copper Peptide GHK-Cu
A naturally occurring copper-binding tripeptide that modulates 4,000+ human genes. The most studied peptide for skin rejuvenation with both preclinical and clinical topical evidence.
FDA Status
Not FDA-approved — available as cosmetic ingredient and research compound
Typical Dose
1–2 mg daily SC or topical (5 days on / 2 off)
Evidence Grade
B+Multiple clinical studies + widespread clinical use
Half-Life
~2 hours (systemic)
Routes of Administration
topical, subcutaneous
First Synthesized
1973
Clinics Indexed
145 providers have offered GHK-Cu in our tracked directory.
Mechanism of Action
Tripeptide–copper complex that resets gene expression toward youthful patterns; stimulates collagen, decorin, and antioxidant defenses; modulates hair-follicle stem cells.
Key Reported Benefits
- ✓Collagen synthesis
- ✓Wrinkle reduction
- ✓Hair growth
- ✓Wound healing
Benefits listed reflect commonly reported effects from clinical trials and practitioner use. Individual response varies. Evidence-grade B+ indicates multiple clinical studies + widespread clinical use.
Reported Side Effects
- •Localized redness (topical)
- •Copper accumulation at very high doses
- •Headache (rare)
Contraindications
- ⚠Wilson's disease
- ⚠Copper sensitivity
Commonly Stacked With
Regulatory & Safety Context
FDA status: Not FDA-approved — available as cosmetic ingredient and research compound
This page is for educational purposes only and does not constitute medical advice. Peptide use outside of an FDA-approved indication should be discussed with a licensed medical professional. Source quality, cold-chain storage, and injection hygiene all materially affect safety outcomes.
See state-by-state legality: US peptide legality by state →
References
Selected primary literature on GHK-Cu. Full PubMed records linked. Additional citations are available on request.
Last reviewed: 2026-04-30
Related Peptides
CJC-1295 (no DAC)
BA growth hormone releasing hormone (GHRH) analog most commonly stacked with Ipamorelin to stimulate natural GH pulsatile release without disrupting the hypothalamic axis.
Ipamorelin
BA selective growth hormone secretagogue that triggers GH release from the pituitary without significantly raising cortisol or prolactin. The safest GH peptide with the fewest side effects.
Sermorelin
B+The original synthetic GHRH(1–29) and the most accessible GH-stimulating peptide for age-related hormone decline. Stimulates the body's own pulsatile GH release rather than replacing it.
MK-677
B+An orally active ghrelin-receptor agonist that drives 24-hour increases in GH and IGF-1. Technically a non-peptide small molecule but always grouped with GH peptides.
GHRP-2
BA potent synthetic ghrelin-mimetic GH secretagogue. Drives strong GH spikes but raises cortisol and prolactin more than newer alternatives like Ipamorelin.
Epitalon
C+A synthetic tetrapeptide that reportedly upregulates telomerase activity. Russian longevity studies suggest mortality reductions but Western RCTs are absent.