Copper Tripeptide-1 (GHK-Cu) is a copper-bound peptide used in skincare for its reported ability to support collagen and elastin synthesis, wound healing, and antioxidant activity. It is considered a bioactive cosmetic ingredient targeting signs of skin aging.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation or redness | Uncommon | Transient irritation can occur, particularly on sensitive skin or at higher concentrations. |
Allergic contact dermatitis | Rare | Sensitization to the peptide or copper component has been occasionally reported. |
Itching or stinging | Uncommon | Temporary sensation upon application, usually subsiding quickly. |
Formulation incompatibility reactions (e.g., when combined with vitamin C or strong acids) | Rare | Not a direct biological side effect but can cause destabilization and unexpected skin response. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.