In our reference data, PEG-40 Stearate can feed Malassezia (fungal acne).
PEG-40 Stearate is a polyethylene glycol ester of stearic acid used in cosmetic and skincare formulations as a nonionic emulsifier and surfactant to blend oil and water phases. It functions as a base/formulation ingredient rather than a therapeutic active.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation | Uncommon | Possible transient redness or stinging, more likely on compromised or sensitive skin. |
Allergic contact dermatitis | Rare | Sensitization to PEG compounds has been documented, particularly on damaged skin. |
Enhanced penetration of other ingredients | Uncommon | As a surfactant it may increase skin permeability, potentially amplifying effects of co-formulated substances. |
Eye irritation | Rare | Reported with direct contact in surfactant-containing products. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.