Discovered 1973 · Rediscovered by You

The molecule
you were born with.

Lost with age.
Restored by BLU°

GHK-Cu — Copper Tripeptide-1. At age 20, your skin carries 200 ng/mL in plasma. By 60, that falls to 80. BLU° delivers the molecule back — at 0.1% concentration, in a premium Lyocell sheet mask.

Shop the Mask The Science
GHK-Cu Copper Tripeptide-10.1% Active ConcentrationParaben Free · Silicone FreePremium Lyocell SheetCeramide NP · Centella Asiatica99%+ Purity · 16-Point COABarrier Repair · Collagen Support · Skin RenewalBiodegradable · Sensitive Skin Approved
The Collection

Choose your ritual.

All products
Best Seller
4-Mask
Collection
GHK-Cu Copper Peptide Repair Mask
$24.99
$6.25 / mask
  • 4 × premium Lyocell sheet masks
  • 25ml serum per mask
  • 0.1% Copper Tripeptide-1 active
  • Paraben & silicone free
Add to Cart — $24.99
Best Value
8-Mask
Collection
GHK-Cu Copper Peptide Repair Mask
$35.99
$4.50 / mask
  • 8 × premium Lyocell sheet masks
  • 25ml serum per mask
  • 28% savings vs. 4-pack
  • Paraben & silicone free
Add to Cart — $35.99

A quiet ritual.
Twenty minutes of stillness.

The sheet is engineered to hold contact with skin for the full diffusion window. Fifteen to twenty minutes is not a suggestion — it is the time the copper tripeptide needs to cross the stratum corneum and begin its work in the layers beneath.

Model resting with the BLU° mask
01 The Ritual
Kinetics of Contact

The molecule works from the inside.

GHK-Cu does not sit on the surface. Worn against the skin for at least 15–20 minutes, the Lyocell sheet forms an occlusive seal — hydrating the upper layers, softening the barrier, and letting the copper peptide travel past it.

0 min 5 10 15–20
0–5min
Conformance
Sheet settles against skin. Surface hydration begins; pores relax under occlusion.
Surface
5–12min
Diffusion
Copper tripeptide carried through the stratum corneum. Tight junctions soften with trapped moisture.
Barrier
12–20min
Activation
GHK-Cu reaches the living epidermis and upper dermis. Collagen and elastin synthesis signalled from within.
Dermal
The Molecule

The molecule that started in 1973. The science that never stopped.

1973
Year of Discovery
Isolated from human plasma by Dr. Loren Pickart. GHK-Cu levels drop by more than half between age 20 and 60 — taking your skin's repair signal with them.
0.1 %
Clinically Meaningful Dose
The concentration used in peer-reviewed studies on barrier repair, collagen synthesis, and skin renewal. Not a trace. Not a marketing number. The real dose.
99 %+
Purity Verified by COA
Every batch of GHK-Cu in BLU° is tested to 99%+ purity via a 16-point Certificate of Analysis. Traceable to source.
50 +
Peer-Reviewed Studies
GHK-Cu is one of the most studied tripeptides in regenerative dermatology. The science isn't new — it's been building since 1973.