GHK-Cu

ID: ghkcu

Aliases: Copper tripeptide-1, GHK-CU

Type: compound

Route/form: topical/cosmetic in most practical use; injection claims are less anchored

Status: cosmetic_or_research

Evidence level: mechanistic

Best data tier: mechanistic/chemistry

Support scope: non-human/mechanistic, review/regulatory

Source types: in_vitro, preclinical, review

Linked sources: 8

Broad outcomes: Gut / immune / inflammation, Hair / alopecia, Longevity / mitochondrial / redox, Muscle growth / performance / recovery, Skin / wound repair

Reading note: These are curation notes anchored to linked sources, not a clinical recommendation or protocol.

Targets / mechanism

• copper-binding tripeptide biology
• extracellular matrix remodeling
• angiogenesis and endothelial-cell proliferation
• anti-inflammatory/antioxidant signaling
• wound repair and tissue remodeling

Optimization domains

• skin
• hair
• wound healing
• cosmetic
• angiogenesis
• extracellular matrix
• inflammation
• oxidative stress
• soft tissue repair

Research basis

• GHK-Cu has a coherent topical/tissue-remodeling rationale: copper-binding tripeptide biology, extracellular matrix remodeling, angiogenesis, and wound-repair signaling are supported by reviews plus rodent wound/ACL/organ-injury models.
• The most directly relevant repair papers are preclinical: rat ACL reconstruction and mouse scald-wound models support localized repair/angiogenesis plausibility, while lung injury/fibrosis and colitis models support broader anti-inflammatory/antioxidant signaling.
• Formulation matters: liposome/cosmetic-delivery work supports topical or local-delivery thinking much more than generic systemic injection claims.

Limits, risks, and missing evidence

• Human efficacy evidence for systemic or injectable GHK-Cu regeneration claims is not established.
• The animal models span very different diseases and routes, so they support mechanism breadth more than a single proven human protocol.
• Copper handling, local concentration, formulation, skin penetration, and contamination/sterility issues matter; plain GHK and GHK-Cu should not be treated as interchangeable for every claim.

Risk flags

• preclinical heavy
• route specific claims
• formulation dependent
• copper biology
• injectable claims weak
• cosmetic vs systemic gap

Linked papers, labels, and reviews

1. GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration
   review / pubmed_ghkcu_2015
   GHK-Cu skin regeneration review.
2. Gene expression data suggest that the copper peptide GHK may have regenerative and protective actions
   review / pubmed_ghkcu_gene_data_2018
   Mechanistic/gene-expression review for GHK-Cu regenerative claims; useful context for skin/wound plausibility but not a direct cosmetic efficacy trial.
3. Tripeptide-copper complex GHK-Cu (II) transiently improved healing outcome in a rat model of ACL reconstruction
   preclinical / pubmed_ghkcu_acl_rat_2015
   Randomized rat ACL reconstruction model; intra-articular GHK-Cu transiently improved laxity and graft-bone healing endpoints, useful for orthopedic repair plausibility but not human ACL evidence.
4. GHK-Cu-liposomes accelerate scald wound healing in mice by promoting cell proliferation and angiogenesis
   preclinical / pubmed_ghkcu_wound_liposomes_mouse_2017
   Mouse scald-wound and HUVEC study; GHK-Cu liposomes promoted endothelial-cell proliferation, VEGF/FGF-2/cell-cycle proteins, angiogenesis markers, and faster wound closure.
5. The tri-peptide GHK-Cu complex ameliorates lipopolysaccharide-induced acute lung injury in mice
   preclinical / pubmed_ghkcu_acute_lung_injury_mouse_2016
   Mouse LPS acute lung injury and macrophage study; supports anti-inflammatory/antioxidant mechanisms through ROS, SOD, TNF-alpha/IL-6, NF-kappaB p65, and p38 MAPK changes.
6. Protective effects of GHK-Cu in bleomycin-induced pulmonary fibrosis via anti-oxidative stress and anti-inflammation pathways
   preclinical / pubmed_ghkcu_pulmonary_fibrosis_mouse_2020
   Bleomycin mouse pulmonary-fibrosis model; adds fibrosis/EMT, oxidative-stress, inflammation, NF-kappaB/Nrf2-adjacent mechanism context, not cosmetic or athletic proof.
7. Exploring the beneficial effects of GHK-Cu on an experimental model of colitis and the underlying mechanisms
   preclinical / pubmed_ghkcu_colitis_mouse_2025
   DSS mouse colitis model linking GHK-Cu to epithelial barrier, inflammatory cytokines, and SIRT1/STAT3 signaling; useful for anti-inflammatory mechanism breadth.
8. Liposomes as Carriers of GHK-Cu Tripeptide for Cosmetic Application
   in_vitro / pubmed_ghkcu_cosmetic_liposomes_2024
   Formulation/in vitro cosmetic-delivery paper for GHK-Cu liposomes; useful for route/formulation specificity and topical claims.