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What Is Blue Peptide? GHK-Cu and Copper Peptides Explained
INGREDIENT
Copper peptide, GHK-Cu, Copper Tripeptide-1 and Blue Peptide are closely related terms, but they do not mean exactly the same thing.
01 — COPPER PEPTIDE
Start with the broader term.
A copper peptide is a peptide bound to a copper ion. One of the best-known copper-peptide complexes used in skincare is GHK-Cu.
“Copper peptide” describes the broader category, while GHK-Cu refers to a specific copper-peptide complex.
COPPER PEPTIDE
A broad term for peptides that are complexed with copper. Product ingredient lists should be checked to identify the specific ingredient used.
02 — GHK-Cu
What is GHK-Cu?
GHK is a tripeptide made from three amino acids: glycine, histidine and lysine.
When GHK binds with copper, the resulting complex is known as GHK-Cu. In cosmetic ingredient lists, this type of ingredient is commonly identified as Copper Tripeptide-1.
If you are looking for a copper-peptide skincare product, checking the ingredient list for Copper Tripeptide-1 is one of the clearest ways to identify this type of ingredient.
03 — BLUE PEPTIDE
So what does TOUN28 mean by Blue Peptide?
TOUN28 uses the name Blue Peptide for its skincare line built around Copper Tripeptide-1 together with seven additional peptides.
The name is inspired by the blue appearance associated with the copper-peptide ingredient. “Blue Peptide” is therefore the name of TOUN28’s skincare line, rather than a separate scientific ingredient name.
04 — THE ROUTINE
Three products. Three different roles.
The Blue Peptide Cica line is designed as a three-step routine: prep and refine, hydrate, then lock in moisture.
3,000 ppm
GHK-Cu · Skin Booster
5,000 ppm
GHK-Cu · Cica Serum
10,000 ppm
GHK-Cu · Cica Cream
05 — HOW TO CHOOSE
Which Blue Peptide product should I choose?
Choose the Skin Booster if you want a lightweight first step. Choose the Cica Serum if you want the dedicated serum step. Choose the Cica Cream if you want the final moisturizing step.
If you want to use the complete routine together, choose the Blue Peptide Cica 3-Step Set.
FAQ
Still wondering?
Are copper peptide and GHK-Cu the same?
GHK-Cu is a specific copper-peptide complex. “Copper peptide” is the broader category term.
What is Copper Tripeptide-1?
Copper Tripeptide-1 is the cosmetic ingredient name commonly used for this type of copper-peptide ingredient in skincare formulas.
Is TOUN28 Blue Peptide a copper-peptide line?
Yes. The TOUN28 Blue Peptide Cica line is built around Copper Tripeptide-1 together with seven additional peptides.
What order should I use the Blue Peptide products?
Skin Booster → Cica Serum → Cica Cream.
