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.
Benefits
- 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#
Best time
They suit either, and nothing about them prefers the night.
How often
Follow the pace on the pack.
Where it goes
After cleansing, before your moisturizer or anything richer.
Where to apply
Across the whole face, and products made for the eye area use it too.
How to apply
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.
What to expect
Most people have no settling-in phase to work through, and few report stinging, dryness or a rough patch at the start. 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 | Most a cosmetic may contain | |
|---|---|---|
 United States | No explicit cap | |
The FDA restricts a short list of ingredients and sets no general strength ceiling on the rest. A figure marked "guidance, not law" is the Cosmetic Ingredient Review panel's recommendation. 21 CFR part 700, subpart B — Requirements for Specific Cosmetic Products (FDA) | ||
 Canada | No explicit cap | |
One list does the work — Health Canada's Hotlist of prohibited and restricted cosmetic ingredients. | ||
 European Union | No explicit cap | |
The Cosmetics Regulation's annexes, consolidated to 1 May 2026. A figure marked "guidance, not law" comes from the EU's cosmetic safety committee rather than from the annexes. | ||
 Great Britain | No explicit cap | |
Great Britain kept the annexes as its own law and updates them only when it chooses; Northern Ireland follows the live EU Regulation, which is why some rows read differently for each. Regulation (EC) No 1223/2009 as it applies in Great Britain · Regulation (EC) No 1223/2009, Annexes II–VI | ||
 India | No explicit cap | |
India writes its own standard, aligned to the European rules as they stood in 2012. Mandatory since 9 February 2026. IS 4707 (Part 2):2025 — restricted and prohibited cosmetic ingredients · IS 4707 (Part 3):2025 — preservatives · Cosmetics Rules, 2020, Ninth Schedule | ||
 Brazil | No explicit cap | |
ANVISA rewrote its restricted list in June 2026, and a companion act amended the prohibited list at the same time. RDC 1.029/2026 — restricted ingredients · RDC 529/2021 — prohibited ingredients, as amended by RDC 1.030/2026 · RDC 528/2021 — preservatives | ||
 Japan | No explicit cap | |
Japan's cosmetics standard keeps drug ingredients out of cosmetics, so most of its figures sit in the ministry's list of the ones a cosmetic may still contain. Cosmetics Standards (化粧品基準), Ministry of Health, Labour and Welfare · Cosmetics Standards — the ministry's own English translation · Drug ingredients permitted in cosmetics — 2007 notification | ||
 South Korea | No explicit cap | |
One MFDS regulation carries both the prohibited list and the restricted list, in force 18 March 2026. Sunscreens and a few other categories are cleared product by product instead. Regulation on Safety Standards for Cosmetics (MFDS Notification 2026-19) · Regulation on the Review of Functional Cosmetics (MFDS Notification 2025-88) | ||
 Kenya | No explicit cap | |
Kenya's standard applies the EU annexes as they stand rather than copying them, so its ingredient limits are the EU's — including the 2024 additions. A figure marked "guidance, not law" sits outside the annexes and does not carry over. KS EAS 377-1, -2 and -3:2022 — cosmetics safety requirements, published by KEBS · Regulation (EC) No 1223/2009, Annexes II–VI | ||
 Namibia | No explicit cap | |
Namibia sets no ingredient limits at all. Its cosmetic rule is a single line requiring a product to be free of any harmful ingredient. Foodstuffs, Cosmetics and Disinfectants Ordinance 18 of 1979, and the regulations under it | ||
 Ukraine | No explicit cap | |
Ukraine's own transposition of the EU annexes, as they stood before the 2024 additions, fully in force since 3 August 2026. A further revision is due on 1 February 2027. Technical Regulation on cosmetic products — Cabinet Resolution No. 65 of 20 January 2021 | ||
 Georgia | No explicit cap | |
Georgia has no cosmetics rulebook — its register of technical regulations carries no cosmetics entry — so only the general product-safety duty applies. | ||
 Australia | 5% (as copper compounds) | |
Australia writes no cosmetic ingredient list. A figure here is the point at which a substance becomes a medicine or a scheduled substance carrying Caution labeling, so its numbers sit well above other markets'. Poisons Standard — June 2026 · Therapeutic Goods (Excluded Goods) Determination 2018 | ||
 United Arab Emirates | No explicit cap | |
The Gulf standard points at the EU annexes as amended, so its ingredient limits are the EU's. A figure marked "guidance, not law" sits outside the annexes and does not carry over. GSO 1943:2024 — Cosmetic products: safety requirements (Gulf technical regulation) · Regulation (EC) No 1223/2009, Annexes II–VI | ||
 Kuwait | No explicit cap | |
The Gulf standard points at the EU annexes as amended, so its ingredient limits are the EU's. A figure marked "guidance, not law" sits outside the annexes and does not carry over. GSO 1943:2024 — Cosmetic products: safety requirements (Gulf technical regulation) · Regulation (EC) No 1223/2009, Annexes II–VI | ||
 Hong Kong | No explicit cap | |
Hong Kong writes no cosmetics rulebook. Its Poisons List (Cap. 138A, Schedule 10) decides which substances may be sold only as medicines, and general safety is judged case by case against whichever overseas standard the enforcer considers reasonable. Pharmacy and Poisons Regulations (Cap. 138A), Schedule 10 — the poisons list · Pharmacy and Poisons Board — Guidance Notes on classifying pharmaceutical products, April 2026 | ||
 Singapore | No explicit cap | |
Singapore writes the ASEAN annexes into its own schedule, and its regulator tells companies to check the current ASEAN release as well — which is why a figure here can read "guidance, not law". Health Products (Cosmetic Products — ASEAN Cosmetic Directive) Regulations 2007, Third Schedule · ASEAN Cosmetic Directive annexes — release 2026-1, 22 June 2026 | ||
 Brunei | No explicit cap | |
Brunei carries the 2007 ASEAN annexes in its own schedule and has not updated them since, so it reads differently from Singapore on several ingredients. Medicines (Cosmetic Products) Regulations (Cap. 285 Rg 1), Schedule 1 — revised edition 2024 | ||
 Jordan | No explicit cap | |
Jordan's cosmetic rules defer to "the approved references" and name none of them, so there is no Jordanian figure to read. The only number in the instrument governs the ingredient list on the pack. JFDA instructions on cosmetics and pharmaceutical cosmetics, 2026 | ||
 Trinidad & Tobago | No explicit cap | |
Trinidad and Tobago has had the power to set cosmetic standards since 1960 and has never used it. The regulations made under the Act cover food and drugs, with no cosmetics part; what binds is the Act's general rule against selling a cosmetic that may injure the user. Food and Drugs Act, Chap. 30:01 · Food and Drugs Regulations | ||
Where a figure appears, that is the maximum strength allowed or advised for copper peptides in that market — some are set in cosmetics regulation, others are the ceiling a cosmetic safety panel recommends. Where no figure appears, the market either sets no cosmetic maximum or handles this ingredient outside its cosmetic rules. These are limits, not targets — the right strength for a formula is the formulator's decision.
Open a market to see the rulebook its figure comes from. Those notes describe each market's own rules as we read them, current to August 24, 2026; the linked documents are the authority, and nothing here is legal advice.
Sample products with Copper Peptides#
A few well-known products, not a full list — product names are each brand's own. We don't sell them — the shop prices them in US dollars and ships from Hong Kong, so delivery and duties come on top. It may not ship everywhere.
We may earn a small commission when you buy through these links.
Already have one? Check how it fits your skin with Pick.
Common questions about Copper Peptides#
What is Copper Peptides?
- A copper-carrying form of a small skin peptide, used in leave-on serums to help skin look firmer and fine lines look softer.
What else is Copper Peptides called?
- On a label you may see GHK-Cu, GHK, Copper tripeptide and Copper peptide.
When should you apply Copper Peptides?
- Morning or evening. They 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.
Can you use Copper Peptides around the eyes?
- Yes. Copper Peptides goes all over the face, the skin around the eyes included — keep it out of your eyes and off your 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.
Some sources below are the official product information for prescription medicines, cited for how they interact with this ingredient. We use them for their safety and handling detail only. A cosmetic product is not one of those medicines and is not intended to treat any condition.
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 S4 and S7 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.
