Skin & aging Carrier/copper peptide
Copper tripeptide-1
Regulatory status
Status at a glance
503A compounding status
Not nominated
We found no pending nomination for the 503A bulks list. Unless the substance has another legal pathway (for example, a USP monograph or use in an FDA-approved drug), 503A pharmacies generally may not compound with it.
- Also known as
- GHK-Cu
- FDA approval
- Not FDA-approved for any use
- 503B outsourcing
- Not determined
- Anti-doping (WADA)
- Not on the WADA Prohibited List
- DEA schedule
- Not a controlled substance
About peptide status
Most peptides discussed here are not FDA-approved for any use, and products labeled “research use only” are not for human use. Removal from Category 2 does not authorize compounding. PCAC votes are non-binding recommendations; FDA and HHS make the final decisions.
This is not medical or legal advice, and we do not publish dosing, sourcing or reconstitution information. Talk with a licensed clinician before using any peptide.
If you think you are having a medical emergency, call 911.
Key takeaway
Copper tripeptide-1, often called GHK-Cu, is a three-amino acid peptide (glycine-histidine-lysine) bound to a copper ion and used in skincare for its proposed role in skin renewal. Laboratory and animal studies show it can signal cells to make collagen and other matrix components. Independent human evidence is thin. In a randomized trial of 13 patients after CO2 laser resurfacing, GHK-Cu skincare showed no significant difference in redness or skin quality in blinded evaluations, though patients rated their overall skin quality higher (p = 0.04). As of 2026 it is a cosmetic ingredient, not an FDA-approved drug.
At a glance
- What it is
- Cosmetic ingredient (GHK-Cu), a copper-bound peptide used in "anti-aging" and repair products
- FDA status
- Cosmetic ingredient rather than a drug, so does not require FDA approval
- Research
- Deep laboratory and wound-healing support; independent human appearance evidence is mixed
- Main uses
- Products targeting the look of firmness, fine lines, and post-procedure skin recovery
- Evidence strength
- Moderate research
Summary
GHK-Cu is a copper-bound tripeptide used in skincare. See how it works in lab studies and why human evidence for cosmetic benefit is still limited.
What is copper tripeptide-1?
Copper tripeptide-1 is a peptide made of three amino acids, glycine, histidine, and lysine, joined to a copper ion. The peptide part, known as GHK, occurs naturally in the body and declines with age. In its copper-bound form, GHK-Cu, it is one of the longest-studied "copper peptides" in skincare and is used in products marketed for skin renewal and repair. It is a cosmetic ingredient, not a drug.
How does it work?
Laboratory studies suggest copper tripeptide-1 acts as a signal that tells skin cells to rebuild the supporting matrix. In cell and animal studies, GHK-Cu:
- Stimulates fibroblasts to produce collagen, elastin, and glycosaminoglycans, the molecules that give skin its structure and cushioning
- Helps regulate the enzymes that break that matrix down
- Delivers copper, a mineral involved in tissue repair
- Has been shown to act as an antioxidant and to support wound healing in animal models
Reviews of laboratory work describe further activity, mostly studied in cells and animals rather than in skin products. In gene-expression analyses, the GHK peptide shows anti-inflammatory activity, increased blood-vessel formation, and changes in many genes tied to repair. These are systemic, preclinical findings, separate from the topical cosmetic use this page covers.
Because of this activity, it is used in cosmetics with the aim of improving the appearance of firm, smooth, and evenly textured skin. These are laboratory and animal findings describing how the peptide behaves; in finished products the benefit is described in appearance terms rather than as a medical repair claim.
Is it FDA-approved?
Safety note
Status: Cosmetic ingredient rather than a drug, so does not require FDA approval
Category: Cosmetic and topical · Primary body area: Skin & aging
No, and it does not need to be. The FDA does not pre-approve cosmetic ingredients. Cosmetics may describe effects on the look and feel of skin, while claims to change the body's structure or function would place a product in the drug category. Copper tripeptide-1 is used as a cosmetic ingredient, for the appearance of the skin.
What is it used for?
Copper tripeptide-1 is used in "anti-aging" serums, creams, and post-procedure products, and also in some hair and scalp products. The appearance goals are the look of firmer, denser skin, a reduction in the appearance of fine lines, and smoother texture, as well as a soothed look after cosmetic procedures.
What does the research show?
Editor’s note
Evidence strength: Moderate research (0 human · 2 animal/cell studies)
It has a large body of laboratory and animal data plus manufacturer-associated human studies pointing to appearance benefits, but the one independent controlled human trial found no clear objective effect, so the human evidence remains limited.
The research is deep on mechanism but thinner on independent human appearance outcomes. According to PubMed, review articles summarize extensive laboratory and animal evidence that GHK-Cu promotes matrix synthesis and wound healing, though many of those studies are associated with the ingredient's commercial developers.
An independent randomized trial of 13 patients used GHK-Cu skincare after CO2 laser resurfacing. Blinded evaluators found no statistically significant difference in redness or skin quality, although patients rated their overall skin quality higher (p = 0.04). In short, the mechanism is well characterized, but strong independent proof of a cosmetic appearance benefit is still limited.
Separately, a small set of animal studies tested GHK-Cu given by injection, and these findings are systemic and preclinical:
| Model | Finding |
|---|---|
| Rats after knee ligament reconstruction | Weekly joint injections for 4 weeks led to a smaller knee laxity difference than saline at 6 weeks (p = 0.009), but the difference was not significant at 12 weeks |
| Mice with lipopolysaccharide-induced acute lung injury | GHK-Cu lowered TNF-alpha and IL-6 through NF-κB p65 and p38 MAPK suppression |
Because both studies are in animals, they do not show an effect of systemic use in people.
What are the side effects?
Copper tripeptide-1 is generally well tolerated on the skin. Potential concerns are mostly practical: very high copper concentrations could be irritating, and the ingredient can be destabilized when layered with strong acids such as high-strength vitamin C or certain exfoliants, which is a formulation consideration rather than a safety hazard. Sensitive skin may react to any new product, so a patch test is reasonable.
Sources: review articles on GHK-Cu biology (Pickart and Margolina, BioMed Research International, 2015, DOI: 10.1155/2015/648108; Pickart, Journal of Biomaterials Science, 2008, DOI: 10.1163/156856208784909435); and an independent randomized post-laser trial (Miller et al., Archives of Facial Plastic Surgery, 2006, DOI: 10.1001/archfaci.8.4.252), all indexed on PubMed. This document is educational and does not constitute medical advice.
Registered human trials
0 registered human trials on ClinicalTrials.gov that we reviewed
Sources
- [1]
- [2]
- [3]
- [4]
- [5]
- [6]
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