Argireline (Acetyl Hexapeptide-8)
Also known as Argireline, Acetyl Hexapeptide-3, Argireline Peptide
INCI name · Acetyl Hexapeptide-8
A cult-favorite peptide for expression areas — used to help soften the look of fine lines around the forehead and eyes. For external cosmetic use only.
Argireline is the peptide people mean when they talk about a topical for expression lines. Its INCI name is Acetyl Hexapeptide-8 — a six-amino-acid peptide with an acetyl cap — and it built a devoted following as a gentle, leave-on option for the areas where the face moves most.
The register here is strictly cosmetic: this is about the look of the skin's surface, not about muscles, injections, or any medical outcome. Everything below stays on that honest line.
What Acetyl Hexapeptide-8 is
Structurally it's a hexapeptide — six amino acids — with an acetyl group capping one end (that's the 'Acetyl' in the name). It's water-soluble and made for leave-on serums, which is why it slots so easily into a daily routine.
You'll sometimes see it listed as Acetyl Hexapeptide-3 on older labels; it's the same well-known Argireline ingredient.
The expression-area angle
Foreheads crease, eyes crinkle — those are simply the busiest zones of the face. Argireline is the peptide formulators reach for when the goal is to help those areas look smoother and more relaxed in appearance. It's used cosmetically to soften the look of fine expression lines, not to change how the face functions.
It's popular precisely because it's undramatic: a comfortable serum you can wear morning and night while the appearance benefit builds with consistency.
Argireline and SNAP-8
Argireline is frequently mentioned in the same breath as SNAP-8 (Acetyl Octapeptide-3). SNAP-8 is an extended-sequence relative — an octapeptide rather than a hexapeptide — in the same expression-area family. Many people choose one or the other; some layer them. Both live in our Fine Lines collection.
How to use it
External use only. Pat a few drops over expression areas — forehead, around the eyes — morning and evening before moisturizer, avoiding the immediate lash line. Patch-test on the inner arm before first use and discontinue if irritation occurs. Store cool and out of direct sun.
Common questions
It appears as Acetyl Hexapeptide-8 (older listings may read Acetyl Hexapeptide-3) — an acetyl-capped six-amino-acid peptide.
No. It's a topical cosmetic peptide used to help expression areas look smoother and more relaxed in appearance. It isn't an injectable and makes no medical claim.
They're relatives in the same expression-area family (a hexapeptide vs. an octapeptide). It's down to preference; some people even layer the two.
This is a cosmetic ingredient profile. It describes the active and the appearance of skin — the look and feel — not a treatment, a claim of any effect, or a recommendation for a medical use. These products are cosmetics and are not intended to diagnose, treat, cure, or prevent any disease. For external cosmetic use only.