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SESH INGREDIENT FILE

PEG-400

INCI PEG-400

Solvent / Humectant Hydration & Barrier

What it is & what it does

PEG-400 is a water-soluble solvent and humectant.
It helps dissolve ingredients and hold some water in the formula and outer skin layers. Its role is mainly vehicle support with modest hydration.

Usage & cautions

Information approach Consumer-friendly summaries are informed by established cosmetic ingredient references such as INCIDecoder and Paula’s Choice Ingredient Dictionary, while avoiding turning ingredient-level evidence into medical claims about the finished product.