Exo-P
INCI: Alteromonas Ferment Extract
Reviewed by Kate · Last updated 18 Aug 2026
Also known as: Alteromonas Ferment Extract, Marine Exopolysaccharide
Marine biotechnology ingredient for pollution protection
Addresses
EWG Safety Score
What Is Exo-P?
Exo-P is a biotechnology ingredient derived from Alteromonas, a marine bacterium found in the extreme environment of deep-sea hydrothermal vents. This microorganism produces exopolysaccharides that protect it from harsh conditions.
When applied to skin, these exopolysaccharides form a protective film that shields against urban pollution, heavy metals, and other environmental aggressors. The ingredient works like an invisible shield over the skin surface.
Exo-P represents the growing field of marine biotechnology in skincare, harnessing the survival mechanisms of deep-sea organisms for skin protection.
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Exo-P is a variant of Alteromonas Ferment Extract, the form you will most often see on an ingredients list.
A fermented marine extract that supports skin conditioning and resilience
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