Microcrystalline wax is a refined petroleum-derived wax used in cosmetics to thicken formulations, stabilize emulsions, bind oils, and impart structure to products like balms, sticks, and creams. It functions primarily as a texture and consistency agent rather than a skin-active ingredient.
| Reported effect | How often | Notes |
|---|---|---|
| Occlusive pore congestion | Uncommon | Heavy occlusion may contribute to comedones in acne-prone individuals. |
| Contact irritation | Rare | Generally considered low-irritation; mild reactions possible in sensitive skin. |
| Allergic contact dermatitis | Very rare | Sensitization is uncommon as refined waxes are largely inert. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.