2026-03-02 · Research summary
GHK-Cu and skin regeneration — what the dermal evidence shows
GHK-Cu has the strongest dermal evidence base of any non-prescription peptide ingredient — supported by gene-expression studies, in-vivo wound-healing models, and decades of topical cosmetic use.
Strongest signals
Increased collagen, elastin, and glycosaminoglycan production by dermal fibroblasts; accelerated wound closure in diabetic and aged-animal models; broad downregulation of pro-inflammatory and pro-fibrotic gene programmes.
Limitations
Most clinical work is cosmetic in nature; therapeutic-grade controlled trials are scarce. Concentration dependence is non-linear: very low nanomolar exposures produce different gene-expression patterns from high micromolar topical formulations.
Practical research considerations
Vehicle, pH, and presence of reducing agents (e.g. ascorbic acid) dominate experimental outcomes. Independent replication of supplier-supplied stability data is advised before any in-vivo study.
Where to source research peptides for laboratory research
The following UK-based suppliers stock research-grade, lyophilised peptides for in-vitro and pre-clinical work. Purity and provenance vary; always request a Certificate of Analysis (CoA) and confirm cold-chain storage on arrival. None of the products linked below are approved for human use.
- PeptideAuthority.co.uk
UK-based research peptide supplier with batch certificates of analysis and >99% purity testing.
- PeptideBarn.co.uk
Wide catalogue of research-grade lyophilised peptides shipped from the UK, including bulk vials.