What does Copper Peptides do?#
Copper peptides (GHK-Cu) are a naturally occurring compound used in advanced skincare. This serum contributes to a firmer, more refined-looking complexion and supports the appearance of smoother, more resilient skin over time.
- Helps support a firmer, more youthful-looking complexion
- Contributes to a more refreshed, revitalized-looking complexion
- Supports the appearance of smoother, more resilient skin
How it works
Copper peptides are valued for their ability to help skin look firmer and more resilient with consistent use. The GHK-Cu complex is a copper-carrying form of the peptide, and with regular use it contributes to a smoother, more refined-looking complexion over time.
How to use Copper Peptides#
- Morning or evening — copper peptides suit either, and nothing about them prefers the night.
- After cleansing, before your moisturizer or anything richer.
- Give it a moment to sink in before the next layer goes on. It is a very water-loving molecule and it takes its time getting anywhere.
- Across the whole face, and products made for the eye area use it too.
- There is no settling-in phase to get through. It does not sting, dry or send skin through a rough patch first, so follow the pace on the pack.
- Give it time — the change is gradual rather than overnight.
Discontinue use if unexpected discomfort occurs.
The form you will see it in
Copper peptide serum
- Where it goes
- Before moisturizer
Using Copper Peptides with other ingredients
What not to use with Copper Peptides
Exfoliants
Never the same eveningExfoliating enzymes and copper peptides are more comfortable in separate sessions than layered together.
Kojic acid
Different timesBetter used on alternate evenings rather than layered together.
Who should avoid Copper Peptides?#
Six situations change whether Copper Peptides suits your skin right now. Each one is either a reason to skip it, a reason to go slowly, or nothing to watch for.
- Maternity & Nursing
- Go slowly
- Recent Facial or Laser
- Go slowly
- Fragile or Sensitive
- No caution
- Prone to Redness
- No caution
- Dry or Itchy Patches
- No caution
- Recent Shave or Wax
- No caution
Maternity & Nursing — If you are pregnant or nursing, you may prefer to check with your healthcare provider before use.
Recent Facial or Laser — Wait until your skin feels settled before reintroducing — typically 7 to 14 days after a facial or laser appointment.
Cosmetic strength limits for Copper Peptides where you live#
| Region | Maximum strength |
|---|---|
| United States | No explicit cap |
| Canada | No explicit cap |
| European Union | No explicit cap |
| Great Britain | No explicit cap |
No cosmetic regulator in these four markets sets a maximum strength for copper peptides. That is a limit on the rules, not a signal to use more: how much goes into a product is the formulator's decision.
Products with Copper Peptides#
We may earn a small commission when you buy through these links.
Copper peptide serum · 5
Common questions about Copper Peptides#
When should you apply Copper Peptides?
- Morning or evening — copper peptides suit either, and nothing about them prefers the night.
How often can you use Copper Peptides?
- Daily.
Where do you apply Copper Peptides?
- All over the face. Keep it away from your eyes and lips.
Does Copper Peptides make skin more sensitive to the sun?
- No. Copper Peptides is not flagged as increasing sun sensitivity.
What should you not use with Copper Peptides?
- Not on the same evening as Exfoliants. Space it apart from Kojic acid.
Who should avoid Copper Peptides?
- Go slowly with Maternity & Nursing and Recent Facial or Laser.
Is there a cosmetic limit for Copper Peptides?
- No. No cosmetic regulator in the United States, Canada, the European Union or Great Britain sets a maximum strength for it. That is a limit on the rules, not a signal to use more.
Related ingredients#
How we check this#
Everything on this page traces to the sources listed below — regulators' own publications and published studies. Where the evidence does not answer a question, it is left unanswered.
Our review is AI-assisted and is not a named expert's opinion. Last reviewed August 7, 2026.
Think something here is out of date or wrong? Email us at wiki@skinintelligence.ai with your reasoning and where you read it. We read what people send, and we update the page when the sources support it.
Regulators and official bodies · 7
- S9Cosmetic Ingredient Review Expert Panel. Safety Assessment of Tripeptide-1, Hexapeptide-12, their Metal Salts and Fatty Acyl Derivatives, and Palmitoyl Tetrapeptide-7 as Used in Cosmetics. Final Report, release date 30 June 2014; panel meeting 9–10 June 2014. Report prepared by Wilbur Johnson Jr. and Bart Heldreth.
- S10Regulation (EC) No 1223/2009 of the European Parliament and of the Council on cosmetic products, consolidated text of 01/05/2026 (CELEX 02009R1223-20260501) — Annex II entry 1726, Annex III, Annex IV entry 132.
- S11Health Canada. Cosmetic Ingredient Hotlist: List of Ingredients that are Prohibited for Use in Cosmetic Products / List of Ingredients that are Restricted for Use in Cosmetic Products, 2025 edition.
- S1221 CFR Part 700 — Cosmetics: General (eCFR, current).
- S13Regulation (EC) No 1223/2009 as assimilated into UK law, Annexes II and III (legislation.gov.uk).
- S19Tretinoin Gel USP / Tretinoin Cream USP — FDA prescribing information (DailyMed SPL set id 4889c7f8-37d0-4f1a-9829-bca107806586, Padagis US LLC).
- S20Isotretinoin Capsules — FDA prescribing information and Medication Guide (DailyMed SPL set id c2917c3d-3499-48a0-ba53-120cb979195d, Amneal Pharmaceuticals LLC).
Studies and references · 17
- S1Hostynek JJ, Dreher F, Maibach HI. Human skin penetration of a copper tripeptide in vitro as a function of skin layer. Inflamm Res. 2011;60(1):79–86. PMID 20721598; PMC3016279; doi 10.1007/s00011-010-0238-9.
- S2Badenhorst T, Svirskis D, Wu Z. Physicochemical characterization of native glycyl-l-histidyl-l-lysine tripeptide for wound healing and anti-aging: a preformulation study for dermal delivery. Pharm Dev Technol. 2016;21(2):152–60. PMID 25384620; doi 10.3109/10837450.2014.979944.
- S3Ufnalska I, Drew SC, Zhukov I, Szutkowski K, Wawrzyniak UE, Wróblewski W, Frączyk T, Bal W. Intermediate Cu(II)-Thiolate Species in the Reduction of Cu(II)GHK by Glutathione: A Handy Chelate for Biological Cu(II) Reduction. Inorg Chem. 2021. PMID 34781677; PMC8653159.
- S4Pickart L, Vasquez-Soltero JM, Margolina A. GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. Biomed Res Int. 2015. PMID 26236730; PMC4508379. COI: Skin Biology.
- S5Pickart L, Margolina A. Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data. Int J Mol Sci. 2018;19(7):1987. PMID 29986520; PMC6073405. COI: Skin Biology.
- S6Pickart L, Vasquez-Soltero JM, Margolina A. The human tripeptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging: implications for cognitive health. Oxid Med Cell Longev. 2012. PMID 22666519; PMC3359723. COI: Skin Biology.
- S7Mortazavi SM, Mohammadi Vadoud SA, Moghimi HR. Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective. Bioimpacts. 2025. PMID 39963574; PMC11830136.
- S8Li H, Toh PZ, Tan JY, Zin MT, Lee CY, Li B, Leolukman M, Bao H, Kang L. Selected Biomarkers Revealed Potential Skin Toxicity Caused by Certain Copper Compounds. Sci Rep. 2016;6:37664. PMID 27892491; doi 10.1038/srep37664.
- S14Ogórek K, Nowak K, Wadych E, Ruzik L, Timerbaev AR, Matczuk M. Are We Ready to Measure Skin Permeation of Modern Antiaging GHK-Cu Tripeptide Encapsulated in Liposomes? Molecules. 2025. PMID 39795193.
- S15Hong M, Gui Y, Xu J, Zhao X, Jiang C, Zhao J, Xin X, Liu D, Tang X, Tang R, An F. Palmitoyl copper peptide and acetyl tyrosine complex enhances melanin production in both A375 and B16 cell lines. Biochem Biophys Res Commun. 2025. PMID 39632290.
- S16Friedmann DP, Mehta E, Verma KK, Harris R. Granulomatous Reactions From Microneedling: A Systematic Review of the Literature. Dermatol Surg. 2025. PMID 39584690.
- S17Jeon S, Maeng J, Lee J, Kim YM, Nam G. A Torilis japonica Extract-GHK-Cu Complex Attenuates Th2 Cytokines and Promotes Keratinocyte Recovery: A Potential Antioxidant Strategy for Atopic Dermatitis. Antioxidants (Basel). 2026. PMID 42510549.
- S18Mazurowska L, Mojski M. Biological activities of selected peptides: skin penetration ability of copper complexes with peptides. J Cosmet Sci. 2008;59(1):59–69. PMID 18350235.
- S21Patel MN, Patel N, Merja A, Patnaik S. An Assessment of the Safety, Efficacy, and Tolerability of a Novel Scalp Treatment Regimen Combining a Hydroxy Acid-Based Scrub and Copper Tripeptide Serum in the Management of Seborrheic Dermatitis in Adults. Cureus. 2024. PMID 39449909; PMC11501000. Open-label, single-arm, n=32, 15 days, scalp, multi-ingredient serum — weak design, used only as a co-use datapoint.
- S22Abdulghani AA, Sherr A, Shirin S, et al. Effects of topical creams containing vitamin C, a copper-binding peptide cream and melatonin compared with tretinoin on the ultrastructure of normal skin — a pilot clinical, histologic, and ultrastructural study. Dis Manage Clin Outcomes. 1998;1(4):136–41. doi 10.1016/s1088-3371(98)00011-4. No PubMed record; the author string is taken from the reference lists of [4] and [7] and could not be confirmed against a primary PMID/DOI record, so the list is given as first-three-plus-et-al.
- S23Lima T, Pedriali Moraes C. Bioactive Peptides: Applications and Relevance for Cosmeceuticals. Cosmetics. 2018;5(1):21. doi 10.3390/cosmetics5010021. Cited only to record its mis-attribution of the PII = 0.3 rabbit study.
- S24Schagen S. Topical Peptide Treatments with Effective Anti-Aging Results. Cosmetics. 2017;4(2):16. doi 10.3390/cosmetics4020016.
