Copper Tripeptide-1
A peptide the body already makes — three amino acids carrying a single copper ion — chosen to help the scalp look conditioned and revitalized. The copper is what turns it blue.
Copper Tripeptide-1 (GHK-Cu) is a copper-bound peptide — three amino acids carrying a copper ion — used in scalp care to help the scalp look conditioned and revitalized.
It is the only Juje active that spans two steps — the No. 1 Clarifier and the No. 3 Elixir — and its copper is what makes it blue.
A peptide the body already makes
It wasn’t invented so much as found — hiding in our own blood, carrying copper.
In 1973, the biochemist Loren Pickart was studying why plasma from younger donors seemed to revitalize aged liver tissue. He traced the effect to a tiny molecule in human blood: a three-amino-acid peptide — glycine, histidine, lysine — bound to a single copper ion. He named the peptide GHK, and its copper complex GHK-Cu.
It circulates naturally in our plasma, and its level falls as we age — roughly 200 nanograms per millilitre in our twenties, down to about 80 by sixty. That decline is much of why researchers have spent five decades studying what happens when it is given back.
So this is not a foreign molecule imposed on skin. It is one the body already recognises, now made pure and precise for skincare — and used by Juje for one honest, cosmetic reason: the look of a conditioned, revitalized scalp.
The molecular portrait
Three amino acids and one metal ion — small, precise, and unmistakably blue.
Copper is essential to skin yet reactive on its own. Bound to the GHK peptide, it is presented in a stable, deliberate form — carried, not scattered.
Four quiet mechanisms
Framed the only way we frame them — toward how the scalp looks and feels.
A peptide skin recognises
GHK-Cu occurs naturally in human plasma — it isn’t foreign to skin, which is part of why it has drawn such long research interest.
Copper, carefully carried
Copper is an essential trace mineral. The peptide holds it in a stable complex rather than leaving it loose and reactive on the scalp.
A conditioned, revitalized look
In Juje it is chosen for one cosmetic purpose — to help the scalp look conditioned, revitalized and cared for.
The signature blue
The copper-peptide bond is what colours it. The blue you see isn’t a dye — it is the chemistry of the molecule itself.
What the research shows
One of cosmetic science’s most-studied peptides — which is exactly why we describe it carefully.
Since its identification in 1973, GHK-Cu has been examined across hundreds of publications in skin and cell-biology research, and is known for binding copper(II) with notably high affinity — the property that defines it.
Much of that literature explores tissue and cellular processes well beyond what a cosmetic may claim. That gap is precisely why Juje speaks only to the look and feel of a conditioned, revitalized scalp — nothing more.
As a trace mineral, copper takes part in many of skin’s normal processes. GHK-Cu is simply a way to present copper in a stable, peptide-bound form rather than as a loose salt.
This is ingredient-level background, attributed to the wider literature — not a claim about results from a Juje product. Juje products are cosmetics that improve how the scalp and hair look and feel.
A blue peptide powder
Its colour is not added — it comes straight from the copper. And the copper is exactly what a formula must protect.
What it is. Copper Tripeptide-1 is supplied as a fine peptide powder whose deep blue comes directly from the copper complex. A little carries a long way — copper peptides are typically used at very low levels, from parts per million to low percentages.
The care it needs. The copper-peptide bond is the whole point, and it can be undone: strong chelators such as EDTA, and certain harsh actives, can pull the copper away or destabilise the complex. Juje formulates around that — mindful of what sits beside it, and where in the process it is added — so the copper stays bound, and blue.
Two homes. Unusually among Juje’s actives, it appears in two steps: the No. 1 Clarifier and the No. 3 Elixir.
first identified
it lives in
that makes it blue
Where it lives in the ritual
The one active that threads through two steps — a rinse-off and a leave-on.
Precise, low-dose, water-phase — handled so the copper stays bound from batch to batch.
No. 1 & No. 3
Copper Tripeptide-1 appears in both the No. 1 Scalp Clarifier (Exfoliate) and the No. 3 Scalp Elixir (Renew) — helping the scalp look conditioned and revitalized across a rinse-off and a leave-on.
A division of labour. Where aloe carries comfort and squalane carries lipid moisture, copper tripeptide carries the conditioned, revitalized look — the sense of a scalp that seems refreshed and cared for.
Placement is everything. Because the copper bond is delicate, where and when it goes into each formula is chosen deliberately — kept away from the things that would loosen its copper.
Two steps, on purpose. Appearing in both the Clarifier and the Elixir lets the same conditioned-looking result carry through the ritual, from first cleanse to final treatment.
The language we stand behind
For retail, stylists and press. GHK-Cu’s research reaches into biology; Juje’s claims stay on the surface — the look and feel of a conditioned scalp.
- Helps the scalp look conditioned and revitalized
- Supports a refreshed, cared-for, healthy-looking scalp
- A copper-bound peptide (GHK-Cu)
- Carries copper, an essential trace mineral, in a stable form
- The signature blue of copper peptides
- Heals, repairs or remodels skin
- Stimulates collagen, elastin or GAGs
- Reduces wrinkles · reverses aging · “anti-aging”
- Regrows hair or blocks DHT
- Treats any wound or condition
GHK-Cu’s research runs deep into biology; on a Juje page we hold to the look and feel of a conditioned scalp — the cosmetic truth, and only that.
Made cleanly, used sparingly
The copper peptide used in cosmetics is produced by controlled peptide synthesis to a high purity — not drawn from animals — and Juje’s is vegan. Copper itself is an essential trace mineral, and a copper peptide is remarkably efficient, doing its cosmetic work at very low levels. Our commitment is a consistently specified, true-blue material, handled so its copper stays bound from the first batch to the last.
Asked & answered
What is Copper Tripeptide-1?+
It’s GHK-Cu — a tripeptide (glycine, histidine, lysine) bound to a copper ion, a molecule found naturally in the body and widely used in skincare. In Juje it helps the scalp look conditioned and revitalized.
Why is it blue?+
The blue comes from the copper bound to the peptide — it’s the colour of the copper complex itself, the same chemistry that makes copper-peptide serums blue. Nothing is added to tint it.
Which products contain it?+
Both the No. 1 Scalp Clarifier and the No. 3 Scalp Elixir. It’s the only Juje active that appears in two steps.
Is it vegan or animal-derived?+
The copper peptide used in cosmetics is made by peptide synthesis, not sourced from animals. Juje’s is vegan.
References
- Pickart L. (1973 onward). Isolation of glycyl-L-histidyl-L-lysine (GHK) from human plasma; foundational copper-peptide research.
- Copper peptide GHK-Cu — encyclopaedic and review overviews: natural occurrence in plasma, copper(II) binding, the blue complex, age-related decline (~200→80 ng/mL).
- Pickart L., reviews in the International Journal of Cosmetic Science and related literature on GHK-Cu in skin models.
- Copper-coordination chemistry of GHK-Cu (peptide–copper(II) complex, ~404 g/mol, 1:1 stoichiometry).
- Note: much GHK-Cu research addresses skin, wound and cell-biology models beyond cosmetic claims.
The Juje Library is educational. It describes ingredients and the research interest in them — not results from any Juje product. Copper Tripeptide-1 (GHK-Cu) has been studied largely in skin, wound and cell-biology research that Juje does not adopt as product claims. Juje products are cosmetics, intended to improve the look and feel of the scalp and hair, and are not intended to diagnose, treat, cure or prevent any condition.