Real GHK-Cu results.
Real skin.
GHK-Cu is one of the most studied peptides in skin science. Here's what happens when you actually use it — week by week, documented by customers and backed by independent clinical research.
Your GHK-Cu results timeline.
Based on clinical trials and customer-reported outcomes. GHK-Cu works cumulatively — give it the full protocol.
Most customers notice something by week 2. The Trio gives you all three formats — target, signal, renew — in one box.
GHK-Cu clinical results,
in plain numbers.
These figures come from peer-reviewed studies on GHK-Cu — conducted independently by dermatologists and research institutions, not by Koppā.
This is what GHK-Cu does. Koppā delivers it at clinical concentration — in three formats designed to work together.
GHK-Cu reviews: what customers say.
"My aesthetician asked what I changed."
"Six weeks in and my aesthetician asked what I changed. The GHK-Cu 2% Serum is the real deal — she could visibly see the difference in my skin density. That says everything."
"Lines above my lip, gone after 3 months."
"The lines above my lip that I've had since my 30s are visibly softer. I did not expect that from a cream. I've tried everything. Nothing worked like this."
"Completely transformed my skin in 8 weeks."
"Three products, three minutes. My skin has completely transformed on the GHK-Cu Trio — tighter, more even, way less dull. I keep thinking it'll plateau but it keeps improving."
"First peptide that actually did something."
"I've tried a lot of peptide products over the years. Koppā is the first one where I actually noticed a difference in texture and firmness within a few weeks. The GHK-Cu Balm Stick is genius."
"My skin looks lifted again."
"I'm 54 and I'd accepted the look of loose skin as my reality. 12 weeks later my jawline looks more lifted and my cheeks look fuller. My skin looks firmer and more even. I cried."
"Worth every single penny."
"I was skeptical at $64 for a serum. But I was spending that on serums that did nothing. Two months in — fine lines around my eyes are noticeably reduced. My skin looks younger. Done."
Join 1,400+ verified customers who made the switch.
Not a mask. Not a filler.
A copper peptide.
GHK-Cu is a copper peptide your body already makes, studied for its role in the look of skin — it supports the skin's healthy-looking appearance. Your skin makes less of it with age. Koppā delivers it back in three formats designed to work together.
Target problem areas
Apply the GHK-Cu Balm Stick directly to fine lines, texture, or areas that need focused attention. The solid format delivers concentrated GHK-Cu exactly where you want it — no dripping, no waste.
Shop the Balm Stick →
Broadcast to the whole face
The GHK-Cu 2% Serum carries GHK-Cu across your full face and neck in a lightweight, fast-absorbing formula. Daily full-face collagen signaling — the foundation of the protocol.
Shop the GHK-Cu Serum →
Lock it in overnight
The GHK-Cu Capsule Cream seals GHK-Cu against your skin while you sleep. Microbeads spread the peptide across every contour. The signal works all night. You wake up with skin that's been repairing for 8 hours.
Shop the Capsule Cream →All three products. One box. Used together they compound — better results than any single product alone.
Get the Full Protocol — Save 15% →50 years of independent research. Zero of it funded by us.
GHK-Cu was discovered in 1973 by biochemist Loren Pickart. Since then, universities and research institutions across the world have studied it independently — and the evidence is clear. We built Koppā around it because we didn't need to manufacture proof. The proof already existed.
The science is real.
The results are yours to find out.
Because we're confident in what this molecule does — and we think you should be too.