Polyepsilon-Lysine
What Polyepsilon-Lysine is & what it does
Polyepsilon-Lysine (epsilon-polylysine) is a naturally derived polymer of the amino acid lysine, typically produced by fermentation. It is commonly used as an antimicrobial and preservative-boosting agent, helping to protect formulas from microbial growth, and it can also act as a skin-conditioning ingredient. Because it is biodegradable and gentle, it appears in products aiming for milder preservative systems. No specific concerns are flagged for this ingredient.
What is Polyepsilon-Lysine?
Polyepsilon-Lysine, or epsilon-polylysine, is a naturally derived polymer of the amino acid lysine, usually produced by fermentation. It is used in cosmetics mainly to help protect formulas from microbial growth.
What does Polyepsilon-Lysine do in a formula?
It works as an antimicrobial and preservative-boosting agent and can also act as a skin-conditioning ingredient. Because it is biodegradable and gentle, it appears in products aiming for milder preservative systems.
Is Polyepsilon-Lysine safe?
It is generally regarded as a gentle, well-tolerated ingredient, and no specific concerns are flagged for it here. Tolerance, as always, can vary by individual.
Sunscreens with Polyepsilon-Lysine
We rate 4 sunscreens that contain it:
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Sanosan Baby Sun Cream SPF50 +
91/100
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SKOON. Skincare Sunnybonani Day Defense Sun Cream SPF 20
75/100
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Luxe Organix UV Perfecting Tint Serum Sunscreen
70/100
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All covered by anna cay All Covered Tinted Sunscreen SPF 50+ Pa+++
67/100