Tetrapeptides are short chains of four amino acids used in skincare to signal skin cells, supporting collagen production, reducing the appearance of wrinkles, and improving skin firmness and tone. They are often included in anti-aging and soothing formulations.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation or redness | Uncommon | Typically transient and more likely in sensitive skin or at higher concentrations. |
Contact dermatitis or allergic reaction | Rare | May relate to the specific peptide or other formulation components rather than the peptide alone. |
Itching or stinging on application | Uncommon | Usually mild and resolves with discontinuation. |
Localized swelling | Very rare | Reported in isolated cases of hypersensitivity. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.