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Humectant

HYDROXYECTOIN

CAS 165542-15-4
92

Safety score · 0–100

Excellent

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

A souped-up version of ectoin from extremophile bacteria — it shields skin from stress, locks in moisture and supports the barrier. One of the cleanest, best-studied actives in modern skincare.

Function

BUFFERINGSKIN CONDITIONING - EMOLLIENTSKIN CONDITIONING

Skin benefits

  • Stabilises proteins and skin lipids against stress
  • Barrier protection in UV and dryness stress models
  • Excellent humectant moisture-binding
  • Soothing on reactive skin
  • Biodegradable and well-tolerated

Known concerns

  • No significant concerns at cosmetic concentrations
  • Cost may drive sub-efficacious dosing in cheaper products

References

EU

EU CosIng database

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

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HYDROLYZED HYALURONIC ACID CROSSPOLYMER
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HYDROLYZED TREMELLA FUCIFORMIS PROTEIN
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KESTOSE
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MANNITOL
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POTASSIUM HYALURONATE
Humectant

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