Collagen production and GHK-Cu levels change dramatically with age.
Select the one that appeared first.
Select all that apply.
Be honest — this shapes your recommendation.
Your skin isn't aging because it lacks hyaluronic acid or retinol. It's aging because the signaling peptides that tell your skin to rebuild are declining every year.
GHK-Cu is a naturally occurring copper peptide in your blood. Research from the Broad Institute shows it can influence ~32% of the human genome, shifting gene expression toward a younger state.
At age 20, you have ~200 ng/mL. By 60, that drops below 80 ng/mL. Replenishing it topically is one of the most direct interventions available.
Pickart et al. 2014, Broad Institute CMAP analysis
Pathway 1 — GHK-Cu: Stimulates collagen I & III, repairs skin barrier, reduces inflammation, signals tissue remodeling.
Pathway 2 — Cycloastragenol: A promising compound studied for its role in telomerase activation — targeting cellular aging at its root.
Honesty note: Cycloastragenol has strong in-vitro evidence but limited large-scale human trials. We position it as a promising complementary mechanism — not a miracle.
| Feature | CU Serum | Retinol | Peptide serums |
|---|---|---|---|
| Collagen stimulation | ✓ Direct | ✓ Indirect | Varies |
| Zero irritation | ✓ | ✗ | ✓ |
| Barrier repair | ✓ | Damages | Some |
| Gene expression reset | ✓ ~4,000 genes | ✗ | ✗ |
| Sun sensitivity | None | Increases | None |
| Cellular aging target | ✓ Cycloastragenol | ✗ | ✗ |
Based on published research: Leyden, Finkley 2005, Pickart 2012-2014
This helps us recommend the right approach for you.
With consistent daily use, most users report visible improvement by this point.
Dual-Active Peptide Serum • 30ml
Lasts 10-12 weeks with daily use
Pair with CU Tallow for the full protocol — the serum rebuilds, the tallow cream locks it in with a bio-compatible barrier.
Get the Duo Set • €69 - €75