Emulsifier and cream stabilizer. Often works together with glyceryl stearate – the pair builds a stable emulsion with a pleasant texture.
Topical application
CWeak evidence. In vitro data, open-label studies, or expert consensus.
Formulation ingredient without direct skin action. Well tolerated, but on a strongly damaged barrier formulas with milder emulsifiers work better.
PEG-100 Stearate is a non-ionic emulsifier, an ester of stearic acid and polyethylene glycol (degree of polymerization 100). One of the most common emulsifiers in cosmetics. Mechanism. Stabilizes oil-in-water emulsions, ensures uniformity and stability of creams, lotions. Facilitates mixing of oil and water phases. Used with glyceryl stearate (the classic "GMS + PEG-100 stearate" pair). Where applied. Creams, lotions, emulsions (1–5%). In most mass-market lines. Evidence base. No clinical RCTs required – a functional emulsifier. CIR confirmed safety. Safety. Hypoallergenic, non-comedogenic. On damaged skin PEG emulsifiers may increase systemic absorption (Lanigan 1999), but this rarely matters clinically. Pregnancy and lactation – topically safe.
Irritation potential
LowAllergen risk
LowPregnancy
SafeSuitable for
The Evigrade extension adds an evidence panel to Wildberries, Goldapple, Letu, iHerb, Sephora and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
PEG-100 Stearate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
PEG-100 Stearate suits: oily, dry, combination, normal.
Emulsifier and cream stabilizer.
The INCI name is PEG-100 Stearate.
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