Understanding GHK-Cu: the copper peptide at the heart of Senn Blue

A naturally occurring copper tripeptide, GHK-Cu has become one of the most studied molecules in modern skin science. Here's why we built The Essentials around it.

GHK-Cu is a small complex of three amino acids bound to a copper ion, naturally present in the body and understood to decline with age. In the literature it is associated with supporting the skin's renewal processes and the appearance of firmness and elasticity.

We dose it at a meaningful, efficacious concentration — 2% in Renewing Serum, 1% in Restorative Cream — rather than a token amount, then support and stabilise it within a considered formula.