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Ingredient library / Polyepsilon-Lysine
Preservative ingredient

Polyepsilon-Lysine

Polyepsilon-Lysine is a natural cationic homopolymer of L-lysine produced by fermentation of Streptomyces albulus, used as a broad-spectrum antimicrobial preservative in cosmetics.

Also known as: epsilon-polylysine, poly-l-lysine, e-polylysine

PreservativeAntimicrobial

Benefits

  • ✓Natural fermentation-derived preservative with broad-spectrum antimicrobial activity
  • ✓Effective over a wide pH range (2–9)
  • ✓ECOCERT/COSMOS approved natural preservative option

Watch for

  • ⚠Limited standalone efficacy; typically used in combination with other preservation systems
At a glance
CategoryPreservative
IrritancyLow–moderate
Beginner-friendlyYes
In your routine

Generally well-tolerated and easy to layer.

Found in 1 product
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Products with Polyepsilon-Lysine

Damask Rose Floral WaterMist
Melvita
Damask Rose Floral Water