GHK-Cu is unusual in this catalogue: it's one of the few peptides with a genuinely substantial body of human research behind it — because the cosmetics industry funded it.
What it is
GHK-Cu is a tripeptide — three amino acids, glycine-histidine-lysine — bound to a copper ion. That copper is not decoration; it's central to how the molecule behaves, and it's why the solution is blue.
Where it comes from
GHK occurs naturally in human plasma. Levels are highest in youth and decline substantially with age — an observation that launched decades of research interest.
Why copper matters
Copper is a required cofactor for enzymes involved in building and cross-linking collagen and elastin — the proteins that give skin structure and spring. GHK acts as a carrier, delivering copper where it can be used.
What research covers
- Collagen production — the most studied area
- Wound repair — much of the original literature
- Skin firmness and fine lines — the cosmetic application
- Hair follicles — a smaller but active area
Why the evidence is stronger here
This is the honest distinction. Cosmetic research is commercially fundable at scale, so GHK-Cu has been studied in humans far more than most research peptides. It appears in commercially available skincare, which means real formulation and tolerability data exists.
That doesn't make every claim about it true — but the evidence floor is meaningfully higher than for compounds studied only in rodents.
A practical note
Copper peptides are known to be sensitive to formulation. Combining them with certain other actives can affect stability — a well-documented consideration in cosmetic chemistry, and part of why formulation work is a discipline of its own.
Related
AHK-Cu is a closely related copper peptide studied more specifically around hair. Both are listed in our Peptide Directory.
Dissolv supplies GHK-Cu for laboratory research only. It is not for human or veterinary consumption as supplied, and nothing here is medical or cosmetic advice.
