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Comparison

GHK-Cu vs Matrixyl

GHK-Cu is healing & repair; Matrixyl is cosmetic & topical. They are compared here because they are frequently considered against each other, not because they act alike.

GHK-Cu Matrixyl
Class Healing & repair Cosmetic & topical
Evidence Clinical trials Clinical trials
Human trials ~15 ~10
Half-life ~30 minutes (systemic) Topical
Reported range 1-2 mg 3-8 mg
Frequency Daily topical, or subcutaneous in research protocols Applied topically 1-2x daily at 3-8% concentration
Routes Topical, Subcutaneous Topical
FDA approved No No
Research use only No No
Banned in sport No No
Studied for Skin repair and anti-ageing, Wound healing, Hair follicle stimulation Collagen stimulation, Wrinkle reduction, Skin firmness
Reported side effects Local irritation, Transient redness, Injection-site reactions Mild local irritation

GHK-Cu

GHK is a tripeptide present in human plasma that declines markedly with age, and it binds copper(II) with high affinity to form GHK-Cu. The complex modulates expression of a large set of genes involved in tissue remodelling, stimulating collagen, elastin and glycosaminoglycan synthesis while influencing antioxidant and anti-inflammatory pathways. Its dermatological evidence is comparatively strong and includes controlled human trials; the systemic injectable use is far less supported.

Matrixyl

Matrixyl is the pentapeptide KTTKS, a subfragment of type I procollagen, conjugated to palmitic acid to allow it to cross the lipid barrier of the stratum corneum. The fragment acts as a feedback signal that collagen has been degraded, prompting fibroblasts to increase synthesis of collagen I, collagen III and fibronectin. Controlled split-face human studies have shown measurable improvement in wrinkle depth, which puts it ahead of most of the cosmetic peptide category on evidence. It is not the same as Matrixyl 3000, a different blend of palmitoyl tripeptide-1 (Pal-GHK) and palmitoyl tetrapeptide-7.

GHK-Cu vs Matrixyl: common questions

What is the difference between GHK-Cu and Matrixyl?

GHK-Cu is healing & repair and Matrixyl is cosmetic & topical, so they act on different pathways. GHK-Cu: A naturally occurring copper-binding tripeptide with the strongest human evidence base of any compound in the healing group, mostly topical. Matrixyl: A palmitoylated collagen fragment and one of the few cosmetic peptides with credible controlled human data.

Which has stronger evidence, GHK-Cu or Matrixyl?

They sit at the same evidence level: clinical trials. GHK-Cu has about 15 human studies and Matrixyl about 10.

Are GHK-Cu and Matrixyl FDA approved?

Neither is FDA approved for any indication.

References

Regulatory and primary sources

  1. PubChem compound record (CID 139035031) ↗ · structure, identifiers, synonyms
  2. CAS Registry Number 89030-95-5 ↗ · chemical identity
  3. CAS Registry Number 214047-00-4 ↗ · chemical identity

Published literature

  1. Pickart 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.PubMed 29986520 · doi:10.3390/ijms19071987
  2. Pickart L, Vasquez-Soltero JM, Margolina A. GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration.Biomed Res Int 2015.PubMed 26236730 · doi:10.1155/2015/648108
  3. Mayfield CK, Bolia IK, Feingold CL, et al.. Injectable Peptide Therapy: A Primer for Orthopaedic and Sports Medicine Physicians.Am J Sports Med 2026.PubMed 41476424 · doi:10.1177/03635465251357593
  4. Rahman OF, Lee SJ, Seeds WA. Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions.J Am Acad Orthop Surg Glob Res Rev 2026.PubMed 41490200 · doi:10.5435/JAAOSGlobal-D-25-00236
  5. Mendias CL, Awan TM. Safety and Efficacy of Approved and Unapproved Peptide Therapies for Musculoskeletal Injuries and Athletic Performance.Sports Med 2026.PubMed 41966639 · doi:10.1007/s40279-026-02437-0
  6. Ogórek K, Nowak K, Wadych E, et al.. Are We Ready to Measure Skin Permeation of Modern Antiaging GHK-Cu Tripeptide Encapsulated in Liposomes?.Molecules 2025.PubMed 39795193 · doi:10.3390/molecules30010136
  7. Pickart L. The human tri-peptide GHK and tissue remodeling.J Biomater Sci Polym Ed 2008.PubMed 18644225 · doi:10.1163/156856208784909435
  8. Renke G, Chinellato L. Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives.Int J Mol Sci 2026.PubMed 42123471 · doi:10.3390/ijms27093890
  9. Röper B, Kaisig D, Auer F, et al.. Thêta-Cream versus Bepanthol lotion in breast cancer patients under radiotherapy. A new prophylactic agent in skin care?.Strahlenther Onkol 2004.PubMed 15127162 · doi:10.1007/s00066-004-1174-9
  10. Kaczvinsky JR, Griffiths CE, Schnicker MS, et al.. Efficacy of anti-aging products for periorbital wrinkles as measured by 3-D imaging.J Cosmet Dermatol 2009.PubMed 19735523 · doi:10.1111/j.1473-2165.2009.00444.x
  11. Osborne R, Hakozaki T, Laughlin T, et al.. Application of genomics to breakthroughs in the cosmetic treatment of skin ageing and discoloration.Br J Dermatol 2012.PubMed 22670614 · doi:10.1111/j.1365-2133.2012.10960.x

Literature retrieved from PubMed on October 16, 2026, favouring human studies and reviews. Numbered markers in the text show which paper supports which statement; uncited entries are background reading.

Read this first This page compares published reference data. It is not medical advice and not a recommendation to use either compound. Several compounds documented on this site are not approved for human use.