Search a concern
Type what you want to change: fine lines, loss of firmness, a stressed barrier. Cosmos matches it to the peptide class that targets it.
Peptide skincare · every dose on the label
Peptides, by the percent.
Cosmos formulas are built around signal, carrier and neuropeptides, each listed at its exact dose, so you can find the peptide for firmness, lines or barrier repair by what it actually does.
Copper Tripeptide-11%
Palmitoyl Pentapeptide-45%
Acetyl Hexapeptide-810%
Palmitoyl Tripeptide-1 + Tetrapeptide-73%
Acetyl Octapeptide-35%
Palmitoyl Tripeptide-82%
Sodium Hyaluronate1%
How it works
From concern to routine in three steps.
Read the full formula
Every product names each peptide by INCI and lists its dose and the finished pH. Nothing is hidden behind "peptide complex".
Build your routine
We order your picks into AM and PM steps and keep copper peptides away from vitamin C and strong acids, which can cancel each other out.
The formulas
Six peptide formulas. No filler.
Filter by what you want to change. Each card names the key peptide, its dose and the finished pH.
6 formulas
No. 01
Carrier
1%GHK-Cu
Copper Peptide Serum
$54A weightless evening serum that delivers copper to skin for repair and firmness.
- Peptide
- Copper Tripeptide-1
- pH
- 6.5
- Size
- 30 ml
No. 02
Signal
5%Matrixyl
Matrixyl Firming Cream
$48A rich daily cream with the signal peptide that tells skin to build collagen.
- Peptide
- Pal. Pentapeptide-4
- pH
- 5.8
- Size
- 50 ml
No. 03
Neuropeptide
10%Argireline
Argireline Line Serum
$38A targeted serum for forehead and crow's-feet lines, used morning and night.
- Peptide
- Acetyl Hexapeptide-8
- pH
- 5.5
- Size
- 30 ml
No. 04
Signal + Neuro
8%Two peptides
Peptide Eye Gel
$36A cooling gel that pairs Matrixyl 3000 with SNAP-8 for the thin skin around the eyes.
- Peptides
- Matrixyl 3000 · SNAP-8
- pH
- 5.6
- Size
- 15 ml
No. 05
Soothing
2%Tripeptide-8
Barrier Peptide Cream
$42Ceramides and a calming peptide to settle redness and rebuild a stressed barrier.
- Peptide
- Pal. Tripeptide-8
- pH
- 5.5
- Size
- 50 ml
No. 06
Complex
6Peptides
Multi-Peptide Booster
$58Six peptides from every class in one booster. Mix two drops into any moisturizer.
- Peptides
- 6 · 4 classes
- pH
- 5.8
- Size
- 30 ml
No formulas match that concern yet.
Dose lab
Slide the vial. Meet the formula.
Each stop on the scale is a peptide at the exact dose we use. Drag the vial, or select it and use the arrow keys.
Peptide library
Which peptide, and how much.
Peptides are short chains of amino acids. Each class sends skin a different message, so we list them by class, INCI name and dose.
| Peptide (INCI) | Class | What it does | Found in | Dose |
|---|---|---|---|---|
| Copper Tripeptide-1GHK-Cu | Carrier | Delivers copper to support repair and firmness | Copper Peptide Serum | 1% |
| Palmitoyl Pentapeptide-4Matrixyl | Signal | Signals skin to build collagen | Matrixyl Firming Cream | 5% |
| Palmitoyl Tripeptide-1 + Tetrapeptide-7Matrixyl 3000 | Signal | Firms and smooths thin skin | Peptide Eye Gel | 3% |
| Acetyl Hexapeptide-8Argireline | Neuropeptide | Softens the look of expression lines | Argireline Line Serum | 10% |
| Acetyl Octapeptide-3SNAP-8 | Neuropeptide | Works alongside Argireline on lines | Peptide Eye Gel | 5% |
| Palmitoyl Tripeptide-8 | Soothing | Calms redness and reactive skin | Barrier Peptide Cream | 2% |
Doses are the percentage of the supplied peptide solution in the finished formula.
The Peptide Routine
Four peptide formulas, already in order.
Neuropeptides by day, repair peptides by night, packed in a linen pouch. Copper peptides go on in the evening so they never meet a morning vitamin C.
Morning
- Argireline Line Serum
- Peptide Eye Gel
- Barrier Peptide Cream
Evening
- Copper Peptide Serum
- Peptide Eye Gel
- Barrier Peptide Cream
$148$170