Argireline Before and After: What Trials Show at 4, 8 and 12 Weeks

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Direct answer: Argireline before and after results in controlled trials are modest and appear at about 4 weeks. The 48.9% figure from a 2013 trial of 60 adults is the share of users rated as improved, not a 48.9% cut in wrinkle depth. Online photos can't separate the peptide from hydration, lighting and expression. Evidence: limited.

Key takeaways

• The only placebo-controlled cosmetic trial with published results ran for 4 weeks. The longest study of an Argireline product ran 12 weeks, and that serum had 5 active ingredients.
• In the only head-to-head trial, an Argireline cream did worse than a Matrixyl cream over 8 weeks.
• No study has followed people past 12 weeks, and none has tracked what happens after they stop.
• Reports of lines looking worse after starting Argireline are real reader experiences, but no study explains them.
• A fair home test needs the same light, the same expressions and 8–12 weeks, with only 1 new product at a time.

If you want the mechanism first, start with our guide to what Argireline does and how it's meant to work. This article sticks to one question: what can you realistically expect to see, and when?

Argireline is the trade name for acetyl hexapeptide-8, a short synthetic peptide. Older papers and labels call it acetyl hexapeptide-3. The EU's official cosmetic ingredient database, CosIng, lists its functions as humectant (a substance that draws in water) and skin conditioning. It lists no anti-wrinkle or muscle-relaxing function (European Commission CosIng). That humectant listing matters for anyone judging before-and-after photos, as we explain below.

How long does Argireline take to work? A before and after timeline from the trials

Here is every human time point we could verify, from shortest to longest.

Evidence for a 2–4 week timeline: limited. Evidence beyond 12 weeks: no data.

Weeks 1 to 4

The Wang trial was the cleanest test. It enrolled 60 Chinese adults who applied product around the eyes twice daily for 4 weeks. Silicone replicas, which are skin-surface molds read by a machine, showed lower roughness with Argireline and no change with placebo (Wang et al., 2013). The same trial also appeared in a second paper. That second paper is not a separate trial. The abstract doesn't report the concentration used.

Weeks 4 to 8

The 8-week Aruan trial is the only one that compared Argireline directly with another peptide. In 21 Indonesian women aged 26–55, a palmitoyl pentapeptide-4 (Matrixyl) cream outperformed both the Argireline cream and placebo on crow's feet (Aruan et al., 2023). The authors called it an "initial study" that needs more participants and a longer run. We break it down in Argireline vs Matrixyl.

60 days to 12 weeks

The 60-day Raikou trial split 24 people into 4 arms. Each arm had about 6 people, which is too few to say much about wrinkles. Its clearest Argireline finding was lower transepidermal water loss (TEWL, the rate water escapes through skin), which is a hydration effect (Raikou et al., 2017).

The 12-week L'Oréal studies reported the largest numbers, and the earliest changes, within the first week. But the serum also contained a second peptide, gluconolactone, niacinamide and laminaria extract, and the abstract describes no placebo (Zhu et al., 2026). Those results can't be credited to Argireline alone.

Is 48.9% a real wrinkle reduction?

No. The figure is a subjective "total anti-wrinkle efficacy" rating. It counts how many people were judged to have improved. In the Wang trial, 48.9% of the Argireline group met that bar and 0% of the placebo group did (Wang et al., 2013).

Put simply, about half of users improved by some amount, and the other half didn't reach the threshold. The 48.9% says nothing about how much the lines changed. Product pages that turn it into "reduces wrinkles by 48.9%" are misreading the study.

The "up to 30%" figure is a different kind of number. It is a depth measurement, and "up to" means 30% was the best result, not the typical one. It comes from the research program that developed the commercial ingredient. The abstract doesn't report how many women took part (Blanes-Mira et al., 2002). Supplier marketing also circulates other percentages that we couldn't trace to any peer-reviewed paper. Treat those as unverified.

Can you trust Argireline before and after photos online?

Not on their own. Photos can't separate the peptide from hydration, lighting, angle and expression, and no study shows Argireline reaching the muscle it is meant to relax.

The "Botox in a bottle" idea assumes Argireline reaches the muscle. The evidence for that is thin. In an in vitro test by US FDA scientists, most of a 10% Argireline emulsion stayed on the skin surface. In human cadaver skin, 0.22% of the applied dose reached the outer skin layer, 0.01% reached the epidermis, and none was detected in the dermis (Kraeling et al., 2015). A 2025 review concluded that whether it reaches the neuromuscular junction "remains uncertain" (Zdrada-Nowak et al., 2025).

What it clearly can do, as a listed humectant in a water-based serum, is change how hydrated the skin surface looks. Plumper, better-hydrated skin softens fine lines on camera within hours, whatever the active ingredient. For more on that effect, see our guide to hydration and the skin barrier.

How to judge an Argireline before-and-after photo

• Lighting: Overhead or side light deepens lines. Flat, front-facing light hides them. The light source should match in both shots.
• Angle and distance: A slight head tilt or a closer lens changes how lines look.
• Expression: Are both photos relaxed, or both raised? A half-smile in one shot invalidates the comparison.
• Hydration: Was the "after" taken right after applying a serum or moisturizer? Fresh product plumps skin for a while.
• Time of day: Skin often looks puffier in the morning and more lined late in the day.
• Makeup and filters: Primer, foundation, beauty modes and compression all blur texture.
• Same-day comparisons: A "before" and "after" taken hours apart mostly shows hydration, not the peptide.

A useful example: one r/30PlusSkinCare user shared a 2.5-week forehead comparison and credited much of the change to swings in hydration and water retention, not the peptide. That kind of honesty is rare, and it's the right instinct.

Why do lines look worse after starting Argireline?

Reports of lines looking worse after starting Argireline come up again and again. In an r/SkincareAddiction thread asking whether an Argireline solution can make wrinkles worse, several users described forehead lines, "11s" or under-eye lines looking deeper within days to about 2 weeks of starting. One described lines going back to baseline after stopping, then looking worse again after restarting, while still using Matrixyl.

We found no study that explains this. None of the trials above reported worsening wrinkles as an outcome. A pattern on a forum is a signal worth taking seriously, but it isn't evidence of cause.

Several confounders could play a part, and none has been tested:

• Hydration changes, including shifts in how the skin holds water.
• A water-based serum drying down, which can make the surface feel tight and look more creased for a while after it's applied.
• Lighting and expression differences between the "before" and the photo that prompted the worry.

If lines look worse to you, the simplest check is to stop the product and compare under the same conditions. If you see irritation, swelling or anything that worries you, talk to a dermatologist.

Do lines come back worse after stopping?

We don't know. No published trial followed people after they stopped Argireline, so nobody has data on rebound, "dependence" or lines returning deeper. These worries come up often in r/TheOrdinarySkincare. The honest answer is that no study has tested them.

The longest data stop at 12 weeks (Zhu et al., 2026). A 70-person periorbital trial at Mahidol University was completed in September 2009, but no results have been posted (NCT01381484). That's a gap in the record, not proof of anything.

If a topical peptide works mainly by hydrating the skin surface, its visible effect would be expected to fade when you stop. That's a reasonable expectation, but no study has tested it.

How do you run a fair Argireline before and after test at home?

You can't run a placebo-controlled trial on your own face. You can, however, remove the biggest confounders.

1. Change 1 thing. Add Argireline to an otherwise stable routine. Don't start retinoids, acids or another peptide in the same window. Our peptide ingredients guide explains how the main types differ if you're choosing between them.
2. Fix the setup. Use the same room, the same window or lamp, the same time of day and the same distance from the camera. Mark where you stand.
3. Shoot clean skin. Take photos before applying anything, or at least 1 hour after skincare, with no makeup and no filters.
4. Take 2 expressions. Take one neutral face and one animated face (raised brows, frown, squint) each time. Static and dynamic lines behaved differently in the L'Oréal data (35–69% vs 10–13%) (Zhu et al., 2026).
5. Run 8–12 weeks. That covers the span the trials measured. Judge at the end, not every morning.
6. Compare side by side. Put the week-0 and week-12 photos next to each other at the same zoom.

If you're also getting neurotoxin injections, the effect of the injection will swamp anything a serum does, which makes a fair test close to impossible.

Where the evidence stops

• Duration: No human data run past 12 weeks, and the only 12-week data come from a multi-ingredient serum.
• Stopping: No study has followed what happens after people stop.
• Worsening: No study has examined reports of lines looking deeper after starting.
• Concentration: The developer study used 10%. The abstracts for the Wang and Aruan trials don't report what they used.
• Replication: The only placebo-controlled cosmetic trial with published results is a single 4-week study. The only head-to-head trial had 21 participants and favored Matrixyl.
• Unpublished work: At least 1 completed 70-person trial has never posted results (NCT01381484).

FAQ

Why do my lines look worse after starting Argireline? Many users report this within days to about 2 weeks, but no study has documented or explained it. Possible confounders include hydration changes, a water-based serum drying down, and differences in lighting or expression between photos. If it persists or comes with irritation, stop the product and see a dermatologist.

How long until I see results? Trials measured changes at 4 weeks (Wang et al., 2013) and 30 days (Blanes-Mira et al., 2002). A multi-ingredient serum showed changes within the first week (Zhu et al., 2026). Allow 8–12 weeks for a fair judgment. Evidence: limited.

Do lines come back worse if I stop? No study has tested this, so we don't know. No published trial followed participants after they stopped, and no data support or rule out a rebound.

Is 48.9% a real wrinkle reduction? No. In the Wang trial, 48.9% is the share of Argireline users rated as improved, compared with 0% on placebo (Wang et al., 2013). It doesn't tell you how much shallower anyone's wrinkles became.

Can a before-and-after photo prove Argireline works? A single photo pair can't. Lighting, angle, expression, hydration, time of day, makeup and filters can all change how lines look as much as or more than a topical peptide. Controlled photos over 8–12 weeks are more useful, but they still aren't a trial.

References

Bracketed text describes each paper. Full titles are on the linked PubMed records.

1. Blanes-Mira C, et al. [Rational design of Ac-EEMQRR-NH2 (Argireline); 30-day wrinkle-depth study and in vitro work]. Int J Cosmet Sci. 2002. Human study in healthy women (n not reported in the abstract) plus in vitro data; developer study. https://pubmed.ncbi.nlm.nih.gov/18498523/
2. Wang Y, et al. [Argireline for periorbital wrinkles in Chinese subjects]. Am J Clin Dermatol. 2013. Placebo-controlled RCT, n=60 (3:1), 4 weeks; funding not stated. https://pubmed.ncbi.nlm.nih.gov/23417317/
3. Wang Y, et al. [Second report of the same 60-subject trial, plus an aged-mouse arm]. J Cosmet Laser Ther. 2013. Same trial as reference 2, not an independent study. https://pubmed.ncbi.nlm.nih.gov/23607739/
4. Aruan RR, et al. [Acetyl hexapeptide-3 cream vs palmitoyl pentapeptide-4 cream vs placebo for crow's feet]. J Clin Aesthet Dermatol. 2023. Double-blind RCT, n=21, 3 arms, 8 weeks; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/36909866/
5. Raikou V, et al. [Acetyl hexapeptide-3 and tripeptide-10 citrulline, alone and combined]. J Cosmet Dermatol. 2017. RCT, n=24, 4 arms, 60 days. https://pubmed.ncbi.nlm.nih.gov/28150423/
6. Zhu M, et al. [Multi-ingredient serum containing acetyl hexapeptide-8; ex vivo and clinical studies]. Int J Cosmet Sci. 2026. 2 clinical studies (n=50, n=42), 12 weeks, no placebo described; L'Oréal R&I authors. https://pubmed.ncbi.nlm.nih.gov/41668671/
7. Kraeling ME, et al. [In vitro skin penetration of acetyl hexapeptide-8 from an emulsion]. Cutan Ocul Toxicol. 2015. In vitro diffusion cells, human cadaver and hairless guinea pig skin, 24 h; US FDA authors. https://pubmed.ncbi.nlm.nih.gov/24754410/
8. Zdrada-Nowak J, et al. [Review of acetyl hexapeptide-8]. Int J Mol Sci. 2025. Narrative review. https://pubmed.ncbi.nlm.nih.gov/40565185/
9. European Commission. CosIng database entry: Acetyl Hexapeptide-8 (functions: humectant, skin conditioning). Accessed October 10, 2026. https://ec.europa.eu/growth/tools-databases/cosing/
10. ClinicalTrials.gov. NCT01381484: Argireline in Treatment of Periorbital Wrinkles. Mahidol University; completed September 2009; enrollment 70; no results posted. https://clinicaltrials.gov/study/NCT01381484

Disclosure: This article is for general information only and isn't medical advice. It summarizes published research and doesn't replace a consultation with a dermatologist or other qualified clinician. This article contains no affiliate links. Community experiences are paraphrased from public forums and are not evidence of effect.

For educational purposes only; not medical advice. See our disclaimer and research method.