GHK-Cu · research summary

Are We Ready to Measure Skin Permeation of Modern Antiaging GHK-Cu Tripeptide Encapsulated in Liposomes?

Molecules (Basel, Switzerland) · 2025. Summary drawn from the study's full text. Each statement is followed by the exact sentence it comes from. This is a research summary, not medical advice.

Study type

Review of literature on skin permeation methods and liposomal delivery of GHK-Cu
“The present review discusses various issues related to obtaining insight into the permeation of CACs through the skin.”

Subjects

Cosmetically active compounds (CACs), specifically the glycyl-L-histidyl-L-lysine tripeptide complex of copper (GHK-Cu) and liposomal carriers
“One such CAC that occurs naturally in the human body and displays many beneficial properties (via reducing fine lines and wrinkles, tightening skin, improving its elasticity, etc.) is the glycyl-L-histidyl-L-lysine tripeptide complex of copper (GHK–Cu).”

Reported findings

GHK-Cu is hydrophilic and has limited permeation through the lipophilic stratum corneum, but liposomes may improve its permeation potential.
“GHK–Cu is a fairly hydrophilic compound with limited permeation through the lipophilic stratum corneum. On the other hand, liposomes capable of encapsulating GHK–Cu may improve its permeation potential.”
Research on the transport of liposomes containing GHK-Cu has received little attention, creating a research gap for methodological development.
“An analysis of the literature data reveals that the transport of liposomes containing GHK–Cu received little attention.”
Various methods such as Franz diffusion cells, Skin-PAMPA, and PVPA are used to study CAC transport, with in vitro approaches being advantageous over human and animal testing.
“The most commonly used approach is in vitro or ex vivo tests using diffusion cells, or more recently, the parallel artificial membrane permeability assay (Skin-PAMPA) and phospholipid vesicle-based permeation assay (PVPA) (Figure 4) [40], allowing for the quantification of the permeation of CACs through the skin.”

Limitations stated by the authors

The skin permeation of liposomal GHK-Cu systems remains a significant research gap, and current analytical techniques often quantify the encapsulated complex only indirectly.
“However, these methods allow the encapsulated complex to be quantified only indirectly.”

Source: PubMed 39795193 · DOI 10.3390/molecules30010136 · all study summaries

Subjects

Cosmetically active compounds (CACs), specifically the glycyl-L-histidyl-L-lysine tripeptide complex of copper (GHK-Cu) and liposomal carriers

“One such CAC that occurs naturally in the human body and displays many beneficial properties (via reducing fine lines and wrinkles, tightening skin, improving its elasticity, etc.) is the glycyl-L-histidyl-L-lysine tripeptide complex of copper (GHK–Cu).”

Reported findings

GHK-Cu is hydrophilic and has limited permeation through the lipophilic stratum corneum, but liposomes may improve its permeation potential.

“GHK–Cu is a fairly hydrophilic compound with limited permeation through the lipophilic stratum corneum. On the other hand, liposomes capable of encapsulating GHK–Cu may improve its permeation potential.”

Research on the transport of liposomes containing GHK-Cu has received little attention, creating a research gap for methodological development.

“An analysis of the literature data reveals that the transport of liposomes containing GHK–Cu received little attention.”

Various methods such as Franz diffusion cells, Skin-PAMPA, and PVPA are used to study CAC transport, with in vitro approaches being advantageous over human and animal testing.

“The most commonly used approach is in vitro or ex vivo tests using diffusion cells, or more recently, the parallel artificial membrane permeability assay (Skin-PAMPA) and phospholipid vesicle-based permeation assay (PVPA) (Figure 4) [40], allowing for the quantification of the permeation of CACs through the skin.”