Eye-Area Peptides: Formulating with Eyeseryl, Dipeptide-2 and Copper Peptides
The eye contour asks for a different peptide brief than the rest of the face. How Eyeseryl (Acetyl Tetrapeptide-5), Dipeptide-2 and the copper peptides differ in the proposed mechanism each supports, how they pair in a periocular formula, and the extra formulation care a delicate application zone demands.
Published June 2, 2026 · 7 min read · By Pepoderma Regulatory Team
An eye serum is not a face serum in a smaller bottle. The eye contour is a thinner, more reactive application zone with its own claim vocabulary — under-eye puffiness, the appearance of dark circles, periocular smoothing — and the peptides that earn a place there are studied around mechanisms that map to those claims rather than to forehead lines or whole-face matrix support. This guide compares the three peptide families a formulator reaches for in an eye-area brief and shows how they pair, with the extra formulation care a sensitive zone demands.
Which peptides are used for the eye area?
The eye-area shortlist runs along the claim it supports. Eyeseryl (Acetyl Tetrapeptide-5) is studied around proposed anti-oedema and vascular-permeability mechanisms for the appearance of under-eye puffiness. Dipeptide-2 (Valyl-Tryptophan) is studied around ACE inhibition as a proposed route to supporting local microcirculation, for the look of puffiness and dark circles. Copper peptides — GHK-Cu (Copper Tripeptide-1) and its hair-scalp cousin AHK-Cu — bring the repair-and-renewal carrier story to periocular skin. The three are studied around different proposed mechanisms, so an eye SKU can carry more than one as complementary arms.
Identity reference
| Active | INCI name | CAS | Proposed eye-area angle |
|---|---|---|---|
| Eyeseryl | Acetyl Tetrapeptide-5 | 820959-17-9 | Anti-oedema / vascular permeability → puffiness appearance |
| Dipeptide-2 | Dipeptide-2 (Val-Trp) | 24587-37-9 | ACE inhibition → local microcirculation support |
| GHK-Cu | Copper Tripeptide-1 | 89030-95-5 | Copper carrier → repair / renewal |
| AHK-Cu | (complex; on batch COA) | — | Copper carrier (follicular cousin), used periocularly at low load |
All ship with INCI name, CAS where applicable, and an allergen and trace-impurity sheet for CPNP and equivalent notifications.
1. Eyeseryl (Acetyl Tetrapeptide-5) — the puffiness specialist
The sequence Ac-βAla-His-Ser-His is studied around two proposed mechanisms relevant to the eye contour: a reduction in vascular permeability (the idea being to limit fluid accumulation in the interstitial space under the eye) and an anti-glycation effect (proposed to help maintain the integrity of the surrounding matrix proteins). That mechanistic pairing is why the marketed positioning is specifically under-eye puffiness and periocular smoothing rather than dynamic forehead lines. For a brand it lets an eye SKU carry claim language that stays specifically about the eye area — and it should stay at the "studied / designed to support" level, since this is a cosmetic active for an eye-care product, not a treatment for oedema as a medical condition.
2. Dipeptide-2 (Val-Trp) — the microcirculation angle
Dipeptide-2 is a compact, water-soluble dipeptide (Valyl-Tryptophan) studied around angiotensin-converting-enzyme (ACE) inhibition as a proposed route to supporting local microcirculation. The cosmetic translation is the "morning eye" story — the appearance of under-eye puffiness and dark circles — which is a different proposed mechanism from Eyeseryl's anti-oedema angle. That makes the two natural partners: an eye SKU can carry both as complementary puffiness arms. As with Eyeseryl, the framing stays cosmetic — supporting the appearance of the eye contour, not treating a vascular condition.
3. Copper peptides around the eye
GHK-Cu brings the carrier-peptide repair narrative to the periocular zone, and the copper family is dosed lower here than on the rest of the face — the published cosmetic range for eye-area and sensitive-skin products sits at the low end, roughly 0.1–0.5% finished mass, where stability and sensory feel matter most. AHK-Cu, the follicular cousin, is sometimes repurposed periocularly at a similarly low load. The catch is the copper coordination: the eye-area carrier has to stay chelator-free (no EDTA, which would strip the copper off the peptide) and copper-clean, exactly as it does in a face serum. Our GHK-Cu field guide is the reference for the copper-coordination rules that carry over unchanged to an eye formula.
How they pair in one periocular formula
Because the three families are studied around different proposed mechanisms, an eye serum can carry a puffiness arm (Eyeseryl), a microcirculation arm (Dipeptide-2), and a carrier-repair arm (a copper peptide) without mechanism overlap. The combination is coherent rather than redundant — the same multi-arm logic behind a whole-face multi-peptide serum, scaled to the eye-area claim set. If the formula includes a copper peptide alongside the water-soluble actives, keep the copper phase chelator-free and the other peptides will sit happily in the same aqueous phase.
The extra care a sensitive zone demands
The eye contour raises the bar on everything around the active:
- Preservation has to hold the whole product safely for an eye-area application — and cosmetic peptides do not self-preserve, so the preservative system carries the load.
- Surfactant choice, fragrance load, and the overall sensory profile deserve the same scrutiny as the active itself; the zone is reactive.
- Lightweight bases suit it — eye gels, hydrogels, roll-on applicators, and gentle non-ionic emulsions rather than heavy occlusive creams.
- Add water-soluble actives cool and late on copper-clean process water at a near-neutral pH (5.5–7.0); the low-MW actives (Dipeptide-2) disperse without a co-solvent slurry.
- Eye-area-specific testing your destination market requires (ophthalmologist assessment, eye-contour tolerance) remains the brand owner's responsibility — verify use levels and the safety package against your own base.
Claim language that stays safe
For all three families, the defensible claims are about appearance: the look of under-eye puffiness, the appearance of dark circles, periocular smoothness. Keep every mechanism at the studied/proposed level, avoid efficacy percentages, and do not cross into the language of treating oedema, vascular conditions, or any medical state. These are cosmetic eye-care actives.
Talk to our regulatory team
Building an eye-area SKU?
Tell us the eye-contour claim and your base. Pepoderma will send INCI documentation, carrier and pH guidance, and samples for Eyeseryl, Dipeptide-2, and the copper peptides — plus the chelator-free notes that keep a copper-peptide eye formula stable.
Frequently asked questions
- What peptides are best for under-eye puffiness?
- Two are specified specifically for the puffiness story, by different proposed mechanisms. Eyeseryl (Acetyl Tetrapeptide-5, CAS 820959-17-9) is studied around proposed anti-oedema and vascular-permeability effects. Dipeptide-2 (Valyl-Tryptophan, CAS 24587-37-9) is studied around ACE inhibition as a proposed route to supporting local microcirculation, for the appearance of puffiness and dark circles. Because the proposed mechanisms differ, an eye SKU can carry both as complementary arms. The framing stays cosmetic — the appearance of the eye contour — not a treatment for oedema or a vascular condition.
- Can copper peptides be used in an eye cream?
- Yes. GHK-Cu (Copper Tripeptide-1) is used in eye-area products to carry the repair-and-renewal narrative, dosed lower than on the rest of the face — the published cosmetic range for eye-area and sensitive-skin products sits at roughly 0.1–0.5% finished mass. The copper-coordination rules carry over unchanged: the carrier must stay chelator-free (no EDTA) and copper-clean, or the copper comes off the peptide. AHK-Cu, the follicular cousin, is sometimes repurposed periocularly at a similarly low load.
- Can Eyeseryl and Dipeptide-2 be combined in one eye serum?
- Yes, and they make natural partners because they are studied around different proposed mechanisms for the same appearance claim — Eyeseryl around anti-oedema and vascular permeability, Dipeptide-2 around ACE inhibition and local microcirculation. Both are water-soluble peptides added cool and late to the water phase at a near-neutral pH (5.5–7.0); Dipeptide-2's low molecular weight means it disperses without a co-solvent slurry. Keep the preservation system robust, since neither peptide self-preserves.
- What extra formulation care does an eye-area peptide product need?
- The eye contour is a thin, reactive zone, so the whole formula around the active warrants scrutiny: the preservation system has to hold the product safely for eye-area use (cosmetic peptides do not self-preserve), and surfactant choice, fragrance load, and sensory profile all matter. Lightweight bases — eye gels, hydrogels, roll-ons, gentle non-ionic emulsions — suit it better than heavy occlusives. Any eye-area-specific tolerance testing your destination market requires remains the brand owner's responsibility.