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For informational purposes only — not medical advice. Always consult a dermatologist for skin concerns.

Epsilon-Polylysine

1% line markerAI-analyzed

INCI: POLYLYSINE

preservativeantimicrobialskin conditioninghair conditioning

What it does

A natural cationic homopolymer of L-lysine, produced by fermentation. It is primarily used as a broad-spectrum antimicrobial preservative in cosmetics, but can also function as a skin or hair conditioning agent due to its cationic nature.

Skin Concerns

Beneficial for

acnedrynesstexture

Safety & Science

Safety summary

Generally considered safe. It is a natural food preservative.

CAS Number

25104-18-1

1% line marker

This ingredient is commonly used as a marker to identify where ingredients drop below 1% concentration on the label.

Found In Products

Related Ingredients

At a Glance

INCI Name: POLYLYSINE
Common Name: Epsilon-Polylysine
Functions: preservative, antimicrobial, skin conditioning, hair conditioning
Products: 13 products
CAS Number: 25104-18-1

For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.

Epsilon-Polylysine — Skincare Ingredient Guide — Dermasift — Dermasift