Anti-aging & longevity
GHK-Cu
Also written: Copper Peptide · Copper Tripeptide-1 · GHK-Copper
A copper-bound tripeptide that turns up in skincare and in vials, which are not the same product. What the difference is, and what to ask.
GHK-Cu is a tripeptide — three amino acids — bound to a copper ion. The copper is not incidental; it is part of the molecule's name and structure, which is why it is described as a copper peptide. It appears in two very different worlds: as a cosmetic ingredient in creams and serums, and as a lyophilized material in a vial. Those are different products with different regulatory positions, and conflating them is a common error.
What the format changes
The cosmetic and the vial are not interchangeable and should not be discussed as if they were. A topical product is regulated as a cosmetic; a vial of reconstitutable material is not a cosmetic, and the questions that apply to it are the supply-chain questions this library keeps returning to rather than the ones on the back of a jar.
What to ask before ordering
Because the copper is structural, purity and characterisation matter in a specific way: what is the material, how was the copper content verified, and what does the certificate for this lot show. A supplier who treats GHK-Cu as interchangeable with its cosmetic form has not thought carefully about which product they are actually selling.
What we are not claiming
That it does anything for skin, hair, tissue, or anything else. The mechanism is Dr. Schuster's subject and is linked above. What is ours to say is what the material is and what to document about it.
Questions we get about GHK-Cu
- Is the GHK-Cu in skincare the same as the vial?
- No. A topical cosmetic and a lyophilized vial are different products with different regulatory positions. They should not be discussed as interchangeable.
- Why does the copper matter?
- It is part of the molecule's structure, not an additive. That makes verifying the copper content and overall characterisation a specific and worthwhile question for any lot.
- Is GHK-Cu FDA approved for injection?
- No. It is not an approved drug product. What a supplier can provide is documentation of what the material is and what testing the lot passed.
Read next from the library
- What a peptide actually isNot a drug class, not a supplement, not a hormone. A length. Once that lands, most of the confusion in this category goes away.
- "Is it FDA approved?" is usually the wrong questionNot because the answer is uncomfortable, but because approval, registration, clearance and certification are four different things — and only one of them is usually on offer.
- How to read a certificate of analysisThe document that separates a supply chain you can defend from one you are trusting. Six fields, and one question that matters more than the rest.