GHK-Cu
Also known as: Copper peptide, Copper tripeptide-1
A copper-binding peptide with a genuine cosmetic-skincare history, but the injectable systemic 'healing' and anti-ageing claims are far less well supported.
Regulatory status: No approved medical drug use; GHK-Cu is an established cosmetic ingredient used topically in skincare products.
What it is
GHK-Cu is a small peptide that occurs naturally in the body and binds copper. It is best known as a copper peptide used topically in skincare, where it is associated with skin-firmness and appearance claims.
Composition
GHK is a three-amino-acid peptide; combined with copper it forms GHK-Cu. It is a well-established cosmetic ingredient, and also sold as an injectable research chemical.
Proposed mechanism
In laboratory and animal work it has been linked to wound-healing, tissue-remodelling and skin-supporting pathways, which underpins both the cosmetic use and the broader "healing" marketing.
Claimed benefits
Firmer, better-looking skin (topical) and, more speculatively, systemic tissue healing and anti-ageing (injected).
What the evidence shows
Silver· mixed evidence. There is laboratory and some topical-skin evidence behind its appearance-related use. The broader systemic "healing" and anti-ageing claims, especially for injected use, rest on cell and animal data rather than good human trials, and should be treated as speculative.
Legal & regulatory status
There is no approved medical drug use; GHK-Cu is an established cosmetic ingredient used topically. It is not specifically named as a prohibited growth factor, but any non-approved substance used by injection can fall into a prohibited category, so athletes should check current WADA guidance rather than assume it is cleared.
Known risks & unknowns
As a topical cosmetic it has a long history of use. Injecting research-chemical versions is a completely different proposition, without safety data or regulatory oversight, and carries purity and contamination risks.
Sources
Frequently asked questions
- What is GHK-Cu?
- GHK is a small peptide that occurs naturally in the body and binds copper, forming GHK-Cu. It is best known as a copper peptide used topically in skincare, where it is associated with skin-firmness and appearance claims.
- Does GHK-Cu heal tissue or reverse ageing?
- There is laboratory and some topical-skin evidence behind its appearance-related use, but the broader systemic 'healing' and anti-ageing claims, especially for injected use, rest on cell and animal data rather than good human trials. Treat the injectable claims as speculative.
- Is GHK-Cu safe?
- As a topical cosmetic ingredient it has a long history of use. Injecting research-chemical versions is a completely different proposition, without safety data or regulatory oversight, and carries purity and contamination risks.
- Is GHK-Cu banned in sport?
- It is not specifically named on the WADA Prohibited List as a growth factor in the way some peptides are. Any non-approved substance used by injection can still fall into a prohibited category, so athletes should check current WADA guidance rather than assume it is cleared.
Related compounds
- BPC-157 (Bronze)
An evidence-tiered explainer on BPC-157: marketed for tendon and gut healing on almost entirely animal evidence, with no controlled human trials.
- TB-500 / Thymosin Beta-4 (Bronze)
An evidence-tiered explainer on TB-500 / thymosin beta-4: marketed for recovery and repair on preclinical evidence, with no controlled human fitness trials.