Tripeptide-3 is a synthetic signal peptide used in cosmetic formulations to support collagen synthesis and reduce the appearance of fine lines. It is generally well tolerated at the low concentrations used in skincare.
| Reported effect | How often | Notes |
|---|---|---|
| Mild transient redness or irritation at application site | Uncommon | Usually self-limiting; more likely in sensitive skin or with high concentrations. |
| Itching or stinging sensation | Rare | Typically resolves shortly after application. |
| Contact dermatitis / allergic sensitization | Very rare | Possible with peptide ingredients or accompanying preservatives in the formulation. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.