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Peptide (cosmetic ingredient)Limited humanNot a drug

Argireline

Acetyl hexapeptide-8 (also listed as acetyl hexapeptide-3)

Last reviewed October 27, 2026 · 20 sources · Written for general readers · Compare with another compound →

The bottom line

Argireline is a lab made peptide used in wrinkle creams. A few small studies found smoother skin around the eyes after one to two months, but the trials were short and tiny, and a third registered trial never posted results.[1][2][3][4] It is a cosmetic ingredient, not a drug, it was weaker than Botox in lab tests, very little of it gets through the skin, and injecting it has led to at least one serious skin infection.[5][1][6][7]

Where the evidence stands

What it is

Argireline is the trade name for a chain of six amino acids (a hexapeptide) with small chemical caps on each end. Its ingredient name is acetyl hexapeptide-8, and it is also listed as acetyl hexapeptide-3.[8]

Scientists designed it to copy part of a nerve protein that Botox also targets, hoping to soften wrinkles without the toxicity of botulinum toxin.[1]

It is sold as an ingredient in creams and serums. Cosmetics do not need FDA approval before sale, but a product that claims to change how the body works can legally count as a drug.[5]

In 2025 the Cosmetic Ingredient Review expert panel judged it safe at the low concentrations used in cosmetics today, but said there were not enough data to call higher amounts safe.[9] Some cosmetic clinics have injected it, a use no published trial has tested.[7]

Name
Argireline (Acetyl hexapeptide-8 (also listed as acetyl hexapeptide-3))
Other names
acetyl hexapeptide-3, acetyl hexapeptide-8, Ac-EEMQRR-NH2
Type
Peptide (cosmetic ingredient)
Sequence
Ac-Glu-Glu-Met-Gln-Arg-Arg-NH2
CAS number
616204-22-9
Formula
C34H60N14O12S
Molecular weight
About 889 g/mol

What it does in the body

Argireline does not occur in the body. It copies a short piece of SNAP-25, a nerve protein that helps nerve endings release the chemical signal that makes muscles contract, and it is meant to weaken that signal slightly in the small face muscles that crease the skin.[1][10]

This is the biology, area by area. A change measured in the body, like a higher blood level, does not always mean a person feels a benefit. The claims check below covers that.

Nerves and facial muscles

Lab finding

In lab tests, argireline competed with SNAP-25 for a place in the SNARE complex, the protein machinery that lets nerve cells release their signals, and it blocked that release, but less strongly than botulinum toxin.[1] A later lab study found it also reduced the release of stress chemicals such as adrenaline from cells.[10]

Getting through the skin

Lab finding

Very little crosses the skin. When a cream was applied to human donor skin for a day, only about 0.2% of the peptide stayed in the outer dead layer, about 0.01% reached the living outer layer, and none reached the deeper dermis.[6] How much gets in depends on the cream base: water rich emulsions delivered more into pig skin than oil rich ones.[11] A 2025 review concluded that poor penetration is a key weakness.[12]

Skin surface and wrinkles

Measured in people

In a 4 week placebo controlled study of 60 people, graders rated about half the argireline group as improved and none on placebo, and skin imprints showed less roughness.[2] In an 8 week trial of 21 women comparing argireline, Matrixyl and placebo creams, both peptides improved crow's feet in some women, with Matrixyl doing somewhat better.[3]

Eyelid muscles

Measured in people

In 24 people with blepharospasm, uncontrolled eyelid squeezing treated with Botox, a topical argireline product slightly lengthened the time before symptoms returned (3.7 versus 3.0 months), but this did not reach statistical significance.[13] This is the only human test of whether it affects a muscle.

Skin cells

Lab finding

In human skin cells and two other cell types grown in the lab, argireline slowed cell growth only at concentrations far higher than a standard cancer drug used for comparison.[14]

Development before birth

Seen in animals

In a 2026 study, argireline placed directly on developing chick embryos at higher strengths shrank part of the brain and showed signs of small eyes.[15] This does not mimic putting cream on skin, and it has not been tested in mammals.

How it works

The idea is to gently relax the small face muscles that crease the skin.

  • Muscles move when nerves release chemical signals. A group of proteins called the SNARE complex helps nerves release those signals.[1]
  • Argireline copies a short piece of one of those proteins, SNAP-25. It competes for a spot in the SNARE complex and makes the complex less stable.[10]
  • In lab tests it blocked the release of nerve signals, but its overall effect was weaker than botulinum toxin, the active part of Botox.[1]

Lab tests show very little peptide from a cream gets past the outer skin, so the theory is not proven in people.[6][12]

What the research shows

We keep animal and human evidence apart. A result in animals is a reason to study something in people, not proof that it works in people.

Animal and lab studies

Lab tests support the idea, with little animal work

  • The original paper found that argireline interfered with the step where tiny sacs inside nerve cells fuse and release their signals.[1]
  • A later lab study found it also reduced the release of catecholamines, stress chemicals such as adrenaline, from cells.[10]
  • In skin from hairless guinea pigs and human donors, less than 1% of the peptide in a cream stayed in the outer dead layer, about 0.01% reached the living outer layer, and none reached the dermis or passed through.[6]
  • In human skin cells and two other cell types grown in the lab, argireline slowed cell growth only at concentrations far higher than a standard cancer drug used for comparison.[14]
  • Safety tests reported in the original paper found no toxicity when swallowed at high amounts and no basic skin irritation.[1]
  • In a 2026 study, argireline placed directly on developing chick embryos at higher strengths shrank part of the brain and showed signs of small eyes. The authors called for larger studies.[15]

Limit: Lab results show a possible mechanism but cannot show that a cream smooths wrinkles, and the embryo finding has not been tested in mammals.

Human studies

A few small, short studies with modest results

  • In the first study, 10 healthy women used a cream with argireline around the eyes for 30 days. Wrinkle depth dropped by up to about 30%, measured from skin imprints. There was no placebo group.[1][10]
  • A 2013 study in China randomly assigned 60 people to an argireline or placebo cream on crow's feet for 4 weeks. Graders rated 48.9% of the argireline group as improved versus none on placebo, and skin imprints showed less roughness only with argireline. Its summary did not report side effects.[2]
  • A 2023 double blind trial in Indonesia randomly assigned 21 women aged 26 to 55 to an argireline cream, a Matrixyl cream or a placebo cream around the eyes for 8 weeks. Both peptides improved crow's feet in some women, Matrixyl appeared to work better, and the authors said the study was too small and short to be firm.[3]
  • A 70 person placebo controlled trial in Thailand tested an argireline gel for 3 months in 2009. It is listed as completed, but no results are posted on its registry page.[4]
  • In a placebo controlled pilot trial of 24 people with blepharospasm who were already getting Botox, a topical argireline product caused no significant side effects. Time until symptoms returned was 3.7 months versus 3.0 on placebo, a trend rather than a clear result.[13]
  • In a retrospective report, 26 patients used an argireline gel cream on scars, wrinkles and other skin marks. The authors described improved hydration, elasticity and oil levels and no allergic reactions, but gave no numbers.[18]
  • A 2024 report pooled the impressions of seven skin doctors and surgeons who paired a serum containing argireline, niacinamide and other actives with Botox. It reported no patient numbers or measured results.[17]
  • A 45 year old woman injected with argireline in the forehead and temples at a private cosmetic clinic developed red nodules and abscesses about a week later. Tests found Mycobacterium abscessus, and she needed five months of antibiotics, with lasting scars and dark marks.[7]

Limit: The studies are small and short, and many cosmetic peptide results are never published in journals or repeated by other teams.[10]

Claims check

The most common claims about this compound, and what studies actually found. Verdicts rate the evidence, not whether you should use it.

Reduces wrinkles and crow's feet

Mixed results

In a 4 week randomized, placebo controlled study of 60 people in China, graders rated 48.9% of the argireline group as improved versus none on placebo, and skin imprints showed less roughness only with argireline.[2] A first study of 10 women found wrinkle depth around the eyes fell by up to about 30% after 30 days, with no control group.[1] In an 8 week trial of 21 women, argireline helped some women but did less well than Matrixyl.[3] A 70 person trial in Thailand finished but never posted results.[4] A 2024 review of anti aging skin ingredients rated peptides as among the better supported types, mostly on the basis of small randomized studies.[16]

Works like Botox in a cream

Not tested

No human study has compared an argireline cream with Botox injections. In lab tests its effect on nerve signals was weaker than botulinum toxin.[1] In donor skin, none of the peptide from a cream reached the dermis, let alone the muscle below it.[6]

Makes Botox last longer or work better

Mixed results

In a small placebo controlled pilot trial, 24 people with blepharospasm used a topical argireline product alongside their Botox shots. Symptoms took a little longer to return with argireline (3.7 versus 3.0 months), but this was only a trend, though 4 of 12 people on argireline had a clearly longer benefit.[13] A 2024 report of doctors' experience with a serum containing argireline and several other actives after Botox gave no numbers and had no control group.[17]

Fades scars

Mixed results

In a retrospective report of 26 patients who used an argireline gel cream on scars and wrinkles, the authors described better hydration and elasticity and no allergic reactions, but gave no numbers and had no comparison group.[18] No controlled trial has tested scars.

Is safe because it is just a cosmetic

Mixed results

In the small trials of products put on the skin, no significant side effects were reported, and early safety tests found no skin irritation.[1][13] An expert cosmetic safety panel judged it safe only at the low concentrations now used.[9] But a woman injected with argireline at a private clinic developed a serious mycobacterial skin infection that needed five months of antibiotics and left scars.[7] A chick embryo lab study also raised a possible concern about effects on development at high exposures.[15]

Known risks and side effects

  • Infection from injections. A published case describes a serious mycobacterial infection after argireline was injected into the face, and the authors suspected a contaminated product, solvent or syringe. It needed months of antibiotics and left scars.[7]
  • Safety judged only at low strengths. An expert cosmetic safety panel found it safe at the low concentrations used in skin products today, but said the data were not enough to judge higher amounts, which rules out any safety assurance for injections or homemade mixes.[9]
  • Modest, short term evidence. The published wrinkle data cover about 90 people followed for two months or less, so lasting benefit is unknown.[1][2][3]
  • Not a Botox replacement. In lab tests its effect was weaker than botulinum toxin, and very little of a cream gets past the outer skin.[1][6]
  • Unregulated injected use. Argireline is not on FDA's compounding lists, and a product that claims to relax muscles may be an unapproved drug, so injectable vials sold online have had no FDA review.[19][5]

Regulatory status

Today: Argireline is sold as a cosmetic ingredient, and cosmetics do not need FDA approval before sale.[5] It does not appear on FDA's compounding category lists and is not named on WADA's 2027 Prohibited List.[19][20]

  1. The Cosmetic Ingredient Review expert panel published its safety assessment, finding the ingredient safe at current low cosmetic concentrations but with too little data for higher ones.[9]

Sources

  1. Blanes-Mira C, Clemente J, Jodas G, et al. A synthetic hexapeptide (Argireline) with antiwrinkle activity. Int J Cosmet Sci. 2002;24(5):303-310. PMID 18498523
  2. Wang Y, Wang M, Xiao S, Pan P, Li P, Huo J. The anti-wrinkle efficacy of argireline, a synthetic hexapeptide, in Chinese subjects: a randomized, placebo-controlled study. Am J Clin Dermatol. 2013;14(2):147-153. PMID 23417317
  3. Aruan RR, Hutabarat H, Widodo AA, Firdiyono MTCC, Wirawanty C, Fransiska L. Double-blind, Randomized Trial on the Effectiveness of Acetylhexapeptide-3 Cream and Palmitoyl Pentapeptide-4 Cream for Crow's Feet. J Clin Aesthet Dermatol. 2023;16(2):37-43. PMID 36909866
  4. Mahidol University. Efficacy and Safety of Topical Argireline in the Treatment of Periorbital Wrinkles. ClinicalTrials.gov NCT01381484. NCT01381484
  5. US Food and Drug Administration. Is It a Cosmetic, a Drug, or Both? (Or Is It Soap?). FDA
  6. Kraeling MEK, Zhou W, Wang P, Ogunsola OA. In vitro skin penetration of acetyl hexapeptide-8 from a cosmetic formulation. Cutan Ocul Toxicol. 2015;34(1):46-52. PMID 24754410
  7. Chen CF, Liu J, Wang SS, Yao YF, Yu B, Hu XP. Mycobacterium abscessus infection after facial injection of argireline: A case report. World J Clin Cases. 2021;9(8):1996-2000. DOI 10.12998/wjcc.v9.i8.1996
  8. FDA Global Substance Registration System. Acetyl hexapeptide-8 (argireline), UNII L4EL31FWIL. FDA GSRS
  9. Johnson W Jr, Bergfeld WF, Belsito DV, Cohen DE, Klaassen CD, Liebler DC, et al. Safety Assessment of Acetyl Hexapeptide-8 Amide as Used in Cosmetics. Int J Toxicol. 2025;44(2 suppl):54S-63S. PMID 40673537
  10. Schagen SK. Topical Peptide Treatments with Effective Anti-Aging Results. Cosmetics. 2017;4(2):16. DOI 10.3390/cosmetics4020016
  11. Hoppel M, Reznicek G, Kählig H, et al. Topical delivery of acetyl hexapeptide-8 from different emulsions: influence of emulsion composition and internal structure. Eur J Pharm Sci. 2015;68:27-35. PMID 25497319
  12. Zdrada-Nowak J, Surgiel-Gemza A, Szatkowska M. Acetyl Hexapeptide-8 in Cosmeceuticals-A Review of Skin Permeability and Efficacy. Int J Mol Sci. 2025;26(12):5722. PMID 40565185
  13. Lungu C, Considine E, Zahir S, Ponsati B, Arrastia S, Hallett M. Pilot study of topical acetyl hexapeptide-8 in the treatment for blepharospasm in patients receiving botulinum toxin therapy. Eur J Neurol. 2013;20(3):515-518. DOI 10.1111/ene.12009
  14. Grosicki M, Latacz G, Szopa A, Cukier A, Kieć-Kononowicz K. The study of cellular cytotoxicity of argireline - an anti-aging peptide. Acta Biochim Pol. 2014;61(1):29-32. PMID 24644551
  15. Nurhidayat L, Rumansara PS, Nuris SF, et al. Neurodevelopmental Responses to Argireline and Matrixyl in Chicken Embryo: An Indication of Teratogenic Potential. Jurnal Biota. 2026;12(2):228-244. DOI 10.19109/biota.v12i2.33882
  16. Chan LKW, Lee KWA, Lee CH. Cosmeceuticals in photoaging: A review. Skin Res Technol. 2024;30(9):e13730. PMID 39233460
  17. Lupin M, Bjerring P, Andriessen A, Chantrey J, Fabi SG, Liew S, et al. Real-World Clinical Experience With a Neuro-Peptide Serum in Combination With Botulinum Toxin Type-A Injections. J Drugs Dermatol. 2024;23(11):43661s3-43661s14. PMID 39496132
  18. Palmieri B, Noviello A, Corazzari V, Garelli A, Vadala M. Skin scars and wrinkles temporary camouflage in dermatology and oncoesthetics: focus on acetyl hexapeptide-8. Clin Ter. 2020;171(6):e539-e548. PMID 33151254
  19. US Food and Drug Administration. Bulk Drug Substances Nominated for Use in Compounding Under Section 503A of the FD&C Act (category lists). Updated May 14, 2026. FDA category list
  20. World Anti-Doping Agency. World Anti-Doping Code International Standard: Prohibited List 2027. In force January 1, 2027. WADA 2027 List
Medical disclaimer

This page is educational information only. It is not medical advice and does not replace care from a licensed medical provider. Do not use this page to decide whether to take any substance. Talk to a licensed medical provider first.

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