The Science
GHK-Cu — copper tripeptide-1 — is the most clinically-studied skin signal peptide in the world. We built INVIRA around it because the science is settled.
0+years
of published research
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peer-reviewed studies
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ingredient doing most of the work
The Details
The molecule
A tripeptide — glycyl-L-histidyl-L-lysine — bound to a copper ion. Naturally produced by the body, but levels drop sharply after age 30. Topical supplementation restores it where it matters.
The evidence
Clinical studies show GHK-Cu signals collagen and elastin production, improves skin barrier function, supports healing, and reduces the appearance of fine lines.
Our position
Every other ingredient is either an established active or a delivery vehicle. We don't dilute GHK-Cu with marketing chemistry — we build around it.
What's not in here
No synthetic fragrance. No sulfates. No phthalates. No parabens. No dye. No ethanol-heavy carriers. No undisclosed actives. If it's in the bottle, it's on the label.
Exact dosing
Every product, measured in milligrams. No proprietary-blend hiding.
The honest comparison
Retinol and vitamin C are great actives. The difference is what you give up to use them.
| What matters | GHK-Cu | Retinol | Vitamin C | Other peptides |
|---|---|---|---|---|
| Collagen renewal signal | ||||
| Gentleness on skin | ||||
| Barrier support | ||||
| Pairs with other actives | ||||
| Depth of published research |
Qualitative summary of published cosmetic-ingredient research. Retinol and vitamin C are excellent actives — GHK-Cu simply delivers the renewal signal without the irritation trade-off.
The pairing
Every INVIRA product carries both — dosed in exact milligrams.
The renewal signal
Copper Tripeptide-1
The hero. A naturally occurring copper peptide that signals skin to produce more collagen, elastin, and the molecules that keep it plump — the renewal instruction your skin sends less of every year.
The smoothing partner
Acetyl Octapeptide-3
The supporting act. An eight-amino-acid peptide that helps soften the look of expression lines — the creases formed by repeated facial movement — while GHK-Cu works on renewal underneath.
Set real expectations
Signal peptides work on your skin's schedule, not overnight. Here's the honest curve.
Days 1–7
Most users report skin feels softer and better hydrated within the first week of daily use.
Weeks 4–6
Improvements in fine lines and overall radiance typically appear with consistent daily use.
Week 8+
Smoother skin texture and stronger barrier function as the renewal signal compounds.
Month 6
Consistency beats perfection. Six months of daily ritual is what changes skin — not any single application.
Why it matters
GHK-Cu is something your body produces — until it doesn't.
Natural GHK-Cu activity falls to roughly a third of its peak by your 60s. Topical INVIRA helps restore the signal your skin stops making.
The bottom line
We don't make wild claims. We don't hide ingredients. We put GHK-Cu in every product because the published research backs it — and we tell you exactly what else is in the bottle.
