1,3-Propanediol is a naturally derived (often corn-based) humectant and solvent used in cosmetics to hydrate skin, enhance ingredient penetration, and improve product texture. It is widely considered a gentle, well-tolerated formulation ingredient.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation | Rare | Occasional transient redness or stinging, typically at higher concentrations or on compromised skin. |
Allergic contact dermatitis | Very rare | Isolated case reports of sensitization; considered uncommon compared to related glycols. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.