A deep research guide to GHK-Cu, the copper-binding tripeptide Gly-His-Lys. Coordination chemistry, extracellular-matrix and gene-expression mechanisms, and an honest in-vitro to limited-human evidence map. Research use only.
Afamelanotide (Scenesse) is a genuine EMA- and FDA-approved medicine for a rare photodermatosis. That regulatory pedigree is real, narrow, and routinely misrepresented by the tanning-peptide trade. Here is the clean version.
Two copper-carrying tripeptides sit side by side in the catalogue—one with a half-century of multi-group science behind it, the other with a thinner, mostly cosmetic-industry record. This is the honest head-to-head the marketing rarely offers.
AHK-Cu is a blue copper-tripeptide complex studied mostly in the long shadow of GHK-Cu, with a particular fascination for the hair follicle. The chemistry is elegant; the human evidence is almost entirely absent.
A three-amino-acid copper complex, first isolated from human plasma in 1977, has become one of the most-studied small peptides in skin and matrix biology. Here is what the research actually shows — and where it goes quiet.
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