PEG-4
PEG-4, or Polyethylene Glycol 4, is a synthetic polymer used primarily as a solvent, humectant, and vehicle in cosmetic formulations. It helps to dissolve other ingredients and can attract moisture to the skin. Its small molecular size allows it to penetrate the skin more readily than larger PEGs.
NoneSolventVeganEvidence: Medium
RiskLow 1 / 4
Irritation i0.5 / 4
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Rated by SpottyLabs' ingredient methodology, independent of brands.
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