Welcome to Koppā.
Thank you for choosing the GHK-Cu Capsule Cream. Everything you need to get it right is on this page — about two minutes to read, once.
One peptide. Dosed properly. Nothing else in the way.
Koppā started with one question: if the research on GHK-Cu has been settled for fifty years, why is it still dosed like a marketing claim?
So we made one thing properly. One peptide, formulated at the concentration the studies actually used, with nothing added to get in its way. No fragrance. No dyes. No filler actives. Nothing in the bottle that is not doing work.
Which means the formula holds up its end. The other half is repetition. Skin does not respond to intensity — it responds to being asked the same thing every day, until it answers. Three minutes, morning and night. That is the whole ask.
How to use the GHK-Cu Capsule Cream.
Use it as the last step of your routine — after the balm stick and serum, before SPF in the morning.
Take a pea-sized amount. The jar looks generous; the dose is not meant to be.
Massage for around 30 seconds. The microbeads break down under the warmth and pressure of your fingers and release GHK-Cu evenly across every contour.
Keep going until the beads have disappeared completely. That is your signal the peptide has been distributed.
Morning: SPF on top. Night: this is where you stop.
The beads are jojoba, not plastic. They are the delivery system rather than a texture gimmick — if you can still feel them, keep massaging.
Skin feels more hydrated and looks calmer. That is real, but it is surface-level — the structural work has barely started.
Texture begins to even out. Most people notice this before they notice anything about lines.
The change that matters. Fine line depth softens and firmness returns. In our 12-week study, this is the window where measurable results appeared.
Results compound. GHK-Cu sustains a repair-signalling environment for as long as you keep using it — and it fades when you stop.
If nothing has shifted by week six, the reason is almost always inconsistent use or applying to fully dry skin — not the formula. Damp skin, every day, no gaps.
Three steps. Each one does something the other two cannot.
The cream is the step that makes the first two hold. It distributes peptide across every contour and seals the routine in overnight, when repair is most active. Target the deepest lines, signal across the whole face, then seal it in. That sequence is the protocol — and it is the same whether you own one step or all three.
A waterless balm that puts nine peptides at full concentration on the zones that show age first. A serum spreads its dose across everything; the stick concentrates it where lines are deepest, and stays put for hours.
Read more →2% GHK-Cu carried across the full face and neck — the clinical dose, stabilised with trehalose so it arrives intact. This is the broad signal that tells fibroblasts to rebuild collagen and elastin.
Read more →Jojoba microbeads break down under your fingers and release GHK-Cu evenly across every contour, then hold the whole routine against the skin overnight — when repair is most active. The step that makes the first two hold.
Once the daily routine is established — usually two or three weeks in — The Flood sits on top of it as a weekly 20-minute intensive. It is an addition to the protocol, not a replacement for any step in it.
The five things people ask in the first week.
Can I use vitamin C? +
Yes — just not in the same moment. Pure ascorbic acid can interact with copper peptides and deactivate them before either ingredient does its job.
The fix is timing, not sacrifice: vitamin C in the morning, GHK-Cu at night. That single separation is all you need. Vitamin C derivatives such as sodium ascorbyl phosphate are gentler on the pairing, but the same split is still the simplest rule to follow.
Can I use retinol? +
Yes, on alternate nights. Retinol and GHK-Cu are not dangerous together — stacking them in one session simply adds irritation without adding benefit, and irritated skin repairs more slowly.
Alternate evenings, or run GHK-Cu in the morning and retinol at night. The same principle applies to AHAs and BHAs: separate sessions, or apply the acid first and wait 20 minutes before the peptide.
How long until I notice results? +
Texture and hydration usually shift in the first 10 to 14 days. That is real, but it is the preview.
The structural changes — fine line depth, density, firmness — typically appear between day 28 and day 42 with daily use. Our independent 12-week study (96 participants) recorded a 73% reduction in fine line depth and a 2.1× increase in measured skin density.
Consistency is the variable that matters more than anything else. Two weeks on and one week off does not average out — it resets.
How should I store it? +
Cool, dry, out of direct sunlight, cap closed. GHK-Cu is sensitive to heat and light, so the three places to avoid are the bathroom windowsill, the shelf inside the shower, and the glovebox of a hot car.
It does not need refrigeration. A drawer or a closed cabinet is ideal. If the blue deepens slightly over the life of the bottle, that is the copper complex behaving normally — not a fault.
What about SPF? +
Always compatible, and always last. Apply your Koppā steps first, give them a minute to absorb, then SPF as the final morning layer.
They are a pair rather than a choice: GHK-Cu repairs accumulated photodamage, SPF stops you adding more to the pile. Using one without the other is doing half the work.
Can I use the Capsule Cream on its own? +
Yes — it works perfectly well as a standalone GHK-Cu moisturiser, and plenty of people start there. It is the gentlest entry point into the protocol, which is why we recommend it as week one for anyone with reactive or compromised skin. You will get more from it once the serum sits underneath it, but it was never designed to be useless alone.
Anything else is answered on the full FAQ, or email hello@koppabeauty.com — we reply within one business day.
If you want the mechanism, not just the method.
GHK-Cu is a tripeptide your own body makes. Plasma levels sit around 200 ng/mL at twenty and fall to roughly 80 ng/mL by sixty — and the decline tracks almost exactly with the loss of skin's ability to repair itself. Applied topically at clinical concentration, it restores that signalling environment rather than imitating its effects.
Human genes whose expression GHK-Cu influences, per a landmark 2012 analysis
GHK-Cu in the Koppā serum — 20,000 ppm, the clinical maximum
Reduction in fine line depth over 12 weeks, 96 participants
That is the short version. The studies, the dosing rationale and the full clinical results are published in one place — no gate, no email required.
Around day 28, you will have enough of a view to say something useful about the cream. Not before — an honest review needs a result to describe, and the result takes four weeks. We will send a reminder when you get there.
If something is not working, tell us that instead. It is more useful to us than a good review, and we would rather fix it than be praised.
Where to go from here.
Never run out.
The only way this stops working is if you stop. A subscription removes the one failure point we can actually design around — the gap between finishing a bottle and remembering to reorder.
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Questions we have not answered here: FAQ · Contact · hello@koppabeauty.com