Tromethamine (trometamol, TRIS) is an organic amine base used in cosmetic and topical formulations to neutralize acidic components and stabilize pH. It functions primarily as a buffering and neutralizing agent rather than as a therapeutic active.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient skin irritation | Uncommon | Possible stinging or redness, particularly on compromised or sensitive skin. |
Allergic contact dermatitis | Rare | Isolated sensitization reports; not a common allergen. |
Eye irritation | Uncommon | Can cause irritation upon direct ocular contact in concentrated form. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.