Acetyl Tetrapeptide-15 is a synthetic signal peptide used in skincare to help reduce skin sensitivity and discomfort by modulating nerve-related responses (such as TRPV1 receptor activity). It is marketed primarily for calming reactive or sensitized skin.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient irritation or redness | Rare | Generally well tolerated; occasional irritation may relate to formulation rather than the peptide itself. |
Contact allergy / sensitization | Very rare | Peptides are uncommon sensitizers, but individual allergic reactions are theoretically possible. |
Stinging or itching on application | Rare | Typically transient and more likely in already compromised skin barriers. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.