Morren Skin Science
Ingredient guide
Acetyl Octapeptide-3, explained clearly.
Acetyl Octapeptide-3 is an eight-amino-acid cosmetic peptide. Morren lists it on every relevant product page and INCI panel, and gives it the formula name Acetyl Octapeptide-3 in its own documentation. This guide covers what it is, which serums carry it, and how much is in each one.
What is Acetyl Octapeptide-3?
Acetyl Octapeptide-3 is a short chain of eight amino acids used as a cosmetic ingredient. It is an octapeptide — the name describes the chain length — and it appears on ingredient labels under exactly that INCI name. It is the peptide Morren calls Acetyl Octapeptide-3.
A note on naming: INCI names are the standardised labelling terms assigned by the International Cosmetic Ingredient Nomenclature Committee. They exist so that any brand, anywhere, declares the same ingredient the same way. Morren publishes both the INCI name and its own formula name so you can match the label to the ingredient list.
Why Morren uses it
Acetyl Octapeptide-3 is included in Morren's multi-signal formulas — the ones built around more than one peptide. It is selected for expression-prone areas and helps soften the visible look of expression lines, supporting a smoother-looking complexion alongside the copper peptide.
It is a cosmetic ingredient. Morren makes no treatment claim for it and no promise of a specific result.
Which Morren serums contain Acetyl Octapeptide-3?
Two of the four face serums carry it, at two different strength levels:
- Morren Blue Eight — Copper Tripeptide-1 with Acetyl Octapeptide-3.
- Renew Complex Daily — Copper Tripeptide-1, Sodium DNA and Acetyl Octapeptide-3.
- Renew Complex Intensive — the richer version, pairing Copper Tripeptide-1 and Sodium DNA with a higher level of Acetyl Octapeptide-3.
Morren Blue Eight → · Renew Complex Daily → · Renew Complex Intensive →
How it appears on the label
Morren names Acetyl Octapeptide-3 on the INCI panel rather than folding it into a blend total. Trace actives like this one are present in very small amounts, so a label that hides the detail behind a proprietary complex tells you almost nothing. Morren names each active, and the INCI panel lists the ingredient itself.
How it appears on the INCI list
On a full ingredient panel it is written as Acetyl Octapeptide-3, listed alongside Copper Tripeptide-1, Sodium DNA and Sodium Hyaluronate. If you are comparing two formulas, the INCI panel is the part you can trust — it is the same vocabulary on every product, from every brand.
Using a serum with Acetyl Octapeptide-3
Apply to clean, dry skin and let it absorb before heavier layers. Morning or evening both work. Judge appearance and feel over weeks of consistent use rather than day to day, and give a formula long enough to become part of a routine you actually keep.
Keep reading
Morren's face serums pair this peptide with Copper Tripeptide-1, a copper-binding tripeptide, and in the Renew Complex formulas with a second peptide complex.
Face copper peptide guide → · Palmitoyl Tripeptide-1 and Palmitoyl Tetrapeptide-7 → · Copper peptide serum guide → · All face serums →