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Skin Conditioning

LEUCINE

CAS 61-90-5 Updated
92

Safety score · 0–100

Excellent

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

About

An essential branched-chain amino acid your body already uses. In skincare it conditions, supports collagen synthesis, and contributes to NMF hydration. CIR-reviewed safe with no documented irritation.

Skin benefits

  • Supports collagen synthesis
  • Provides hydration as amino acid
  • Barrier repair support
  • Negligible irritation potential

Known concerns

  • No significant concerns at cosmetic concentrations

References

EU

EU CosIng database

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

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CERAMIDE 1
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CERAMIDE 1 A
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CERAMIDE 2
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CERAMIDE 3
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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.