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PEG-5 PHYTOSTEROL

82

Safety score · 0–100

Good

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

A plant-derived emulsifier that combines phytosterols with a short PEG chain — helps stabilise formulations while delivering cholesterol-like barrier benefits to skin.

PEG-5 Phytosterol is the polyethylene glycol ether of beta-sitosterol (a plant sterol) with 5 moles of ethylene oxide. It functions as an emulsifier and skin-conditioning agent. Phytosterols are structural analogues of cholesterol, a key component of the skin's lipid barrier, making this ingredient particularly beneficial for barrier-repair formulations. The short PEG chain provides water solubility while maintaining the sterol's skin-affinity. CIR reviews of phytosterol ingredients support their safety. Low degree of ethoxylation minimises 1,4-dioxane concerns.

Skin benefits

  • Barrier repair and reinforcement
  • Cholesterol-analogue skin conditioning
  • Emulsification
  • Anti-inflammatory phytosterol benefits

Known concerns

  • Potential trace 1,4-dioxane from ethoxylation (minimal at 5 EO)
  • Plant sterol source may be from soy — relevant for soy-allergic individuals

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.