yes i take peptides · shopping companion

GHK-Cu

Copper Tripeptide-1

Category · For SkinStatus · OTCCitations · 60

The verdict

Yes for topical use as a small additive — no for injectable use.

By source — cost, legality, risk

Topical cosmetic (The Ordinary, NIOD CAIS3, Skinceuticals)
$15–$80 per bottle
OTC cosmetic
Lowest. Cosmetic-grade; the bulk of GHK-Cu evidence is for topical use. Concentrations often undisclosed and frequently under 1%.
Compounded 503A injectable
$100–$350/mo
Rx · widely available through hormone clinics (status contested pending formal FDA Cat 1 update)
Lowest of the injectable lanes. Pharmacy-grade; reconstituted product should turn blue-green.
RUO injectable
$40–$120/mo
Sold 'for research only'
Vendors frequently sell GHK (no copper) labeled as GHK-Cu at the same price; the blue-green color is the check.
Gray-market raw
$2–$6/mo
Unregulated overseas import
Cheapest molecule on the gray-market list. Same upstream as RUO; the per-mg cost is roughly 1/10 of US RUO retail.

Stop signals · abort if

visible contact dermatitis
persistent blue-green skin tint that doesn't wash off (over-application)
allergic reaction. For injectable use: stop for any injection-site reaction that doesn't resolve in 48 hours, any systemic symptoms

Sources · top 5 of 60

01Dou Y, et al. The potential of GHK as an anti-aging peptide. Aging pathobiology and therapeutics. 2020;2(1):58-61. PMID: 35083444.
02Pickart L, et al. Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data. International journal of molecular sciences. 2018;19(7). PMID: 29986520.
03Mortazavi SM, et al. Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective. BioImpacts : BI. 2024;15:30071. PMID: 39963574.
04Rahman OF, et al. Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions. Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews. 2026;10(1). PMID: 41490200.
05Mayfield CK, et al. Injectable Peptide Therapy: A Primer for Orthopaedic and Sports Medicine Physicians. The American journal of sports medicine. 2026;54(1):223-229. PMID: 41476424.