Best peptide serums for expression lines (2026)

Key takeaways

• Visible expression lines are the lines that form where the face moves most: across the forehead, between the brows, and around the mouth. A 2025 paper on Acetyl Hexapeptide-8 names muscle fibers that “pull the skin inward” among the main reasons these lines form.

• For the look of expression lines, check the INCI for Acetyl Hexapeptide-8 (often sold as Argireline) or a related Peptide, ideally alongside Signal Peptides and Humectants.

• We rank The SMOOTH Dynamic Wrinkle Defense Serum from U Beauty first. It lists four peptides, including Acetyl Hexapeptide-8 and Copper Tripeptide-1, plus two Retinol Esters, with no fragrance ingredient on its INCI.

• For $12, Good Molecules combines two movement-line Peptides with copper tripeptides in one serum.

Not every visible line on the face forms the same way. Some come mostly from dryness, some from sun exposure over years, and some from movement: raising your brows, frowning, smiling. This guide is about the third kind. Below, we explain which peptides brands use for the look of movement lines and how to read them on a label, then compare eight serums by their peptide roll call and the part of the face each suits.

Where visible expression lines form

They tend to show up in three places:

• The forehead: visible horizontal lines from raising the brows.

• Between the brows: visible vertical lines from frowning or concentrating.

• Around the mouth: visible lines from smiling and talking.

Visible lines at the outer corners of the eyes are expression lines too, but the eye area has its own products, so our peptide eye creams roundup covers them. Every serum below is for the face (and, in several cases, the neck), applied around the eye area rather than on it.

How peptides are grouped on a label

A 2025 review of cosmetic peptides in Biomolecules groups them by what they’re meant to do: signal peptides, carrier peptides (copper peptides among them), neurotransmitter-inhibiting peptides, and enzyme-inhibiting peptides. For the look of lines from movement, three of those matter most:

• Neurotransmitter-inhibiting peptides: Acetyl Hexapeptide-8, often sold as Argireline, is one example; a 2025 paper on Acetyl Hexapeptide-8 says it “has received considerable attention for its potential to dynamically reduce wrinkles.” Acetyl Octapeptide-3 and Pentapeptide-18 are related names you’ll see on INCIs.

• Signal peptides: Palmitoyl Pentapeptide-4, Palmitoyl Tripeptide-1, and Palmitoyl Tripeptide-5 are common examples. The Biomolecules review describes signal peptides as used “to stimulate fibroblast cells to increase collagen production.”

• Copper peptides: Copper Tripeptide-1 is a peptide bound to copper, and it often appears next to the other two groups.

On a label, what helps most is seeing each peptide named by its INCI rather than only under a trademark.

Label checklist for the look of movement lines

• Acetyl Hexapeptide-8 or a related Peptide: named on the INCI.

• A signal peptide or copper peptide alongside it, for the look of smoothness and firmness more broadly.

• Humectants, since visible lines can look deeper when skin is dry.

• A texture you’ll use twice a day: consistency matters more than any one ingredient.

• No fragrance: worth prioritizing if your skin is reactive.

At a glance

1. U Beauty The SMOOTH Dynamic Wrinkle Defense Serum: our overall pick for the look of expression lines

2. Good Molecules Super Peptide Serum: the $12 Argireline pick

3. Peach & Lily Copper Peptide Pro Firming Serum: 12 peptides, copper included

4. Naturium Multi-Peptide Advanced Serum: Argireline with a copper peptide for $25

5. HydroPeptide Power Serum: a professional-brand peptide formula

6. Olay Collagen Peptide Visibly Firming Serum: a drugstore signal peptide

7. Olay Regenerist Micro-Sculpting Serum: for lines that look worse on dry days

8. Herbivore Moon Fruit 1% Bakuchiol + Peptides: the plant-based option

How we compared these products

We did not test these on skin. Our October 2026 comparison is a read of each brand’s page and ingredient list, on five points:

• Peptides on the INCI, by name and group, and whether an Argireline-type peptide is listed.

• Supporting ingredients: humectants, a Retinoid, or Niacinamide.

• Directions: morning, night, or both, and whether the neck is included.

• Fragrance status, by label or INCI.

• Published figures and price, with study size and length where the brand gives them.

Peptide serums for the look of expression lines compared

1. U Beauty The SMOOTH Dynamic Wrinkle Defense Serum: our overall pick for the look of expression lines

Made for visible fine lines and wrinkles on the face and neck, The SMOOTH Dynamic Wrinkle Defense Serum has a peptide list that includes Acetyl Hexapeptide-8, the movement-line peptide described above. Glycerin is second on its INCI and Squalane fourth, with Centella Asiatica Leaf Extract eighth. Copper Tripeptide-1 is 11th; three more peptides follow, with Acetyl Hexapeptide-8 the last of them. Retinyl Linoleate and Retinyl Palmitate, both Retinol Esters, sit between them. SIREN Capsule Technology™, U Beauty’s proprietary ingredient delivery system, powers the formula.

That covers three of the peptide types above in one serum, and the Retinol Esters add a gentle, effective Retinoid, for visibly smoother, tighter-feeling skin.

Key features:

• Four peptides, including Acetyl Hexapeptide-8 and Copper Tripeptide-1: movement-line, signal, and copper peptides in one formula.

• U Beauty’s figures: wrinkle depth improved by 20%, measured 15 minutes after the first application in an instrumental clinical study (30 volunteers); and after seven days of consistent daily use, 93% of a 30-volunteer consumer perception panel agreed skin looked tighter.

• No fragrance ingredient: none on the INCI.

• Face and neck, morning and night: 1 to 2 pumps in upward motions, after the Resurfacing Compound and before The SUPER Hydrator.

Best for: visible movement lines across the forehead, the frown area, and the mouth, plus the neck.

Tradeoff: it’s made for the face and neck, not the eye area; for the look of crow’s feet, The RETURN Eye Concentrate from U Beauty is the eye-area product. It’s also the highest-priced serum here.

Price: $248 for 30 ml; $148 for 15 ml.

2. Good Molecules Super Peptide Serum: the $12 Argireline pick

Good Molecules points this serum at visible lines caused by repeated facial expressions. Its three named peptide families are Acetyl Hexapeptide-8, Acetyl Octapeptide-3, and copper tripeptides.

Key features:

• Two movement-line peptides: both named on the page.

• Copper tripeptides: a third named peptide family.

• Fragrance-free: per Good Molecules.

• Morning and evening: before oils and creams.

Best for: trying an Argireline serum for the first time without spending much.

Tradeoff: Good Molecules’ page didn’t render the full INCI when we checked, so we couldn’t confirm ingredient positions.

Price: $12 for 30 ml.

3. Peach & Lily Copper Peptide Pro Firming Serum: 12 peptides, copper included

With 12 peptides by the brand’s count, 0.2% of them copper peptide, this is the most crowded peptide list here. Right after Betaine come Copper Tripeptide-1 and then Acetyl Hexapeptide-8, followed by Palmitoyl Tripeptide-1, Tetrapeptide-21, Palmitoyl Tripeptide-38, Palmitoyl Pentapeptide-4, and others, with several forms of Hyaluronic Acid later.

Key features:

• All three peptide groups: signal, copper, and movement-line.

• Acetyl Hexapeptide-8 seventh: high on the list for a peptide.

• Fragrance: nothing listed on the INCI.

Best for: visible expression lines plus a general wish for firmer-looking skin.

Tradeoff: with 12 peptides on one list, it’s hard to tell which does what.

Price: $49 for 30 ml.

4. Naturium Multi-Peptide Advanced Serum: Argireline with a copper peptide for $25

Naturium’s INCI places Squalane sixth. Acetyl Hexapeptide-8 arrives 17th, directly followed by a copper heptapeptide and a third, longer-named peptide.

Key features:

• Acetyl Hexapeptide-8 plus a copper peptide: two of the groups that matter for the look of movement lines.

• Squalane in the base: a light lipid.

• No fragrance entry: none on the INCI.

Best for: combination skin that wants a light Argireline serum under moisturizer.

Tradeoff: it has no Retinoid or Niacinamide, so it’s a peptide step only.

Price: $25 (1.0 fl oz).

5. HydroPeptide Power Serum: a professional-brand peptide formula

HydroPeptide says Power Serum combines six peptide complexes with Hyaluronic Acid. Glycerin is second on its INCI and Lactococcus Ferment Lysate third, with Hexapeptide-11 19th, then Palmitoyl Hexapeptide-19, Acetyl Dipeptide-1 Cetyl Ester, and Sodium Hyaluronate.

Key features:

• Several named peptides: Hexapeptide-11, Palmitoyl Hexapeptide-19, and Acetyl Dipeptide-1 Cetyl Ester.

• Humectants: Glycerin and Sodium Hyaluronate.

• Face and neck: a full pump before moisturizer.

Best for: readers who want a professional-brand peptide serum for the look of lines and texture.

Tradeoff: it doesn’t list Acetyl Hexapeptide-8, and lemon and orange peel extracts, among other citrus extracts, are on the INCI.

Price: $160 for 1 fl oz.

6. Olay Collagen Peptide Visibly Firming Serum: a drugstore signal peptide

Olay’s serum lists Niacinamide third, with Glycerin, Panthenol, and Palmitoyl Pentapeptide-4, a signal peptide. Olay says to use it morning and night on the face and neck before moisturizer.

Key features:

• Palmitoyl Pentapeptide-4: a well-known signal peptide.

• Niacinamide near the top: third on the INCI.

• Fragrance-free: per Olay.

Best for: a low-cost serum for fine expression lines that look worse when skin is dry.

Tradeoff: it doesn’t carry an Argireline-type peptide, so it’s a signal-peptide pick rather than a movement-line one.

Price: $39.99 (1.3 oz).

7. Olay Regenerist Micro-Sculpting Serum: for lines that look worse on dry days

The Micro-Sculpting Serum lists Glycerin third and Niacinamide fourth, with Panthenol and Palmitoyl Pentapeptide-4 further down, in a silky serum Olay suggests for the face and neck, morning and night.

Key features:

• Glycerin and Niacinamide high on the list: for visibly dry skin.

• A signal peptide: Palmitoyl Pentapeptide-4.

• Two versions: original and fragrance-free.

Best for: visibly dry skin where lines look deeper.

Tradeoff: the original formula contains fragrance, so choose the fragrance-free version if that matters to you.

Price: $36.65 for 1.7 oz.

8. Herbivore Moon Fruit 1% Bakuchiol + Peptides: the plant-based option

Herbivore pairs 1% Bakuchiol, 10th on its INCI, with what it calls plant peptides. Glycerin is eighth.

Key features:

• 1% Bakuchiol: a plant ingredient Herbivore positions as an alternative to Retinol.

• Plant peptides: per Herbivore.

• Glycerin eighth: a humectant in the base.

Best for: sensitive-feeling skin that prefers plant-derived ingredients.

Tradeoff: Herbivore doesn’t name its peptides by INCI on the list we read, and orange peel, rose, and vanilla extracts are on it.

Price: $68 for 30 ml.

How to use a peptide serum for the look of expression lines

• Twice a day, on clean skin: Most serums here have morning and evening directions.

• Focus where you move: Press the serum across the forehead, between the brows, and around the mouth, then spread the rest over the face and neck.

• Seal it in: A moisturizer over the top can help keep lines from looking deeper as skin dries through the day.

• Pair with a Retinoid at night, if you like: The SMOOTH already carries Retinol Esters. If you use a separate Retinoid, our guide to Retinol for beginners covers how to start.

• Wear sunscreen every day: A broad-spectrum sunscreen is especially important when a routine includes a Retinoid.

For a wider look at peptide formulas, see our peptide serums roundup.

When to see a dermatologist

Redness or stinging that lingers after a new serum is a reason to stop it and book a board-certified dermatologist.

Frequently asked questions

What is the best peptide serum for expression lines?

Our top pick is The SMOOTH Dynamic Wrinkle Defense Serum from U Beauty, listing Acetyl Hexapeptide-8, Copper Tripeptide-1, and two more peptides alongside two Retinol Esters, with no fragrance ingredient. For $12, Good Molecules’ serum names two movement-line peptides plus copper tripeptides.

How do visible expression lines differ from visible lines caused by dryness?

Visible expression lines form where the face moves, such as the forehead and around the mouth. Visible lines from dryness can appear anywhere and can look softer once skin is hydrated. Some people have both, and most picks here pair peptides with humectants.

What is Argireline on an ingredient list?

Argireline is a trade name. On an INCI it appears as Acetyl Hexapeptide-8.

How long before a peptide serum makes a visible difference?

Brands measure different things at different points: The SMOOTH reports results from 15 minutes to seven days. Give any serum several weeks of consistent use before judging it.

Can I use a peptide serum around my eyes?

Use an eye product there instead. The serums here are made for the face and, in several cases, the neck.

Related reading

• Best serums for wrinkles

• Best products for loose, sagging face skin

• Best hydrating serums