Caprooyl Tetrapeptide-3 is a lipidated synthetic peptide used in cosmetic formulations to support extracellular matrix proteins such as collagen and elastin, with the goal of improving skin firmness and reducing the appearance of fine lines. The caproyl (fatty acid) modification enhances its lipophilicity and skin penetration.
| Reported effect | How often | Notes |
|---|---|---|
| Mild transient skin irritation or redness | Rare | Generally well tolerated at cosmetic concentrations; mild localized reactions may occur in sensitive individuals. |
| Contact allergy or sensitization | Very rare | Peptides are uncommon allergens, but isolated hypersensitivity reactions are theoretically possible. |
| Stinging or itching upon application | Rare | Usually self-limiting and may relate to other formulation components rather than the peptide itself. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.