Polylysine
INCI: Epsilon-Polylysine
Reviewed by Emma · Last updated 18 Aug 2026
Also known as: EPL, Natural Antimicrobial Peptide
Natural purifying for preservation and skin health
Addresses
EWG Safety Score
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What Is Polylysine?
Epsilon-polylysine is a naturally occurring antimicrobial peptide produced by fermentation of Streptomyces albulus. It has been used in food preservation and is gaining popularity in skincare.
The peptide provides broad-spectrum antimicrobial activity against bacteria, yeast, and fungi. It can serve as both an active ingredient and a natural preservative.
Polylysine is gentle enough for use on skin while providing effective protection against microorganisms.
How widely it's used
Regulatory information
Standardised cosmetic-ingredient identifiers used by regulators.
Show identifiers
- INCI Name
- POLYLYSINE
- EC Number
- -
- Function
- Hair Conditioning
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