Honest about what we test, and what to expect.
How Koppā formulas are tested, the timelines the research actually supports, and the claims we won't make. When something on this page changes, we change this page.
Page updated 27 September 2026How our products are tested.
Testing happens at two levels: the raw ingredient before it goes into a formula, and the finished formula itself.
Independent third-party testing
Finished Koppā formulas are tested by an independent laboratory we don't own or operate. Ask us for the current documentation and we'll share what we hold.
Raw-material certificate
We hold a certificate of analysis from our GHK-Cu supplier covering the identity and purity of the raw peptide supplied to us.
Published ingredient lists
Every formula's full ingredient list is published on its product page, with the GHK-Cu concentration stated plainly: 2% in the serum, 0.5% in the capsule cream and balm stick.
A raw-material certificate and a finished-formula test are different documents, and we treat them differently. When we cite one, we say which it is.
What to realistically expect.
No copper peptide product changes your skin overnight. Ours included.
Weeks, not days
Skin renews on a cycle of roughly 28 days, and that cycle slows with age. Published GHK-Cu studies measure changes over 4 to 12 weeks of consistent use, so that is the honest timeframe to judge us on.
Results vary
Skin type, age, routine and consistency all shape what you'll see. Two people using the same product rarely get identical results, and no honest brand promises otherwise.
Cosmetic, not medical
Koppā products are cosmetics. They support how skin looks and feels: firmness, smoothness, hydration. They don't treat medical conditions, and we won't suggest they do.
If a skincare product promises overnight transformation, be skeptical. That standard applies to us too.
Why we only make four products.
A serum, a capsule cream, a balm stick and the protocol that combines them. That is the whole range, on purpose.
One well-studied molecule, formulated carefully, is worth more to us than a shelf of launches. A small range means every formula gets the attention that testing, sourcing and reformulation demand, and nothing ships just to fill a gap.
Claims we won't make.
A short list of things you won't read on a Koppā label or page.
No borrowed evidence
When we cite research, it is research on GHK-Cu the ingredient, and when a study wasn't run on our finished formula, we say so rather than let you assume it was.
No medical claims
Nothing we sell diagnoses, treats or cures a skin condition. If you're managing one, the right person to ask is a dermatologist, and our pages say exactly that.
No manufactured proof
No doctored before-and-after photos, and no ratings or reviews that don't come from real customers.
No timelines we can't back
If we say weeks, we mean weeks. Where we can't support a claim with evidence we can show you, we don't make the claim.
Want to look a little closer?
Ask about an ingredient, a concentration or the current testing documentation. We'll explain exactly what we can share, and what its scope is.
Ask a questionFor the published research behind GHK-Cu, visit Science.
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