Acetyl Octapeptide-3, explained clearly.

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 OCTA-SIGNAL 8™.

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 concentrations:

• Morren Blue Eight — 0.50% GHK-Cu with 0.01% Acetyl Octapeptide-3 (100 ppm).
• Renew Complex Daily — 0.20% GHK-Cu, 0.20% PDRN and 0.01% Acetyl Octapeptide-3 (100 ppm).
• Renew Complex Intensive — the concentrated version, at roughly 0.033% Acetyl Octapeptide-3 (about 330 ppm, 10 mg per 30 mL).

Morren Blue Eight → · Renew Complex Daily → · Renew Complex Intensive →

What the percentage means

Morren states the real percentage of Acetyl Octapeptide-3 rather than folding it into a blend total. Trace actives like this one are measured in very small amounts — 0.01% is 100 parts per million — so a label that hides the number behind a proprietary complex tells you almost nothing. On a Morren product page the number is written out, 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, in descending order of concentration 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 GHK-Cu, a copper-binding tripeptide, and in the Renew Complex formulas with a second peptide complex.

GHK-Cu guide → · Palmitoyl Tripeptide-1 and Palmitoyl Tetrapeptide-7 → · Copper peptide serum guide → · All face serums →