L'ESP Seafill, in INCI Alteromonas Ferment Extract, is an exopolysaccharide obtained through fermentation from a marine bacterium isolated in the waters of Brittany. It belongs to the family of film-forming polysaccharides and is produced through biotechnology, without any extraction from the marine environment.
It is a high-molecular-weight polymer, and its size determines how it works: it spreads across the surface, forming a continuous film that fills the finest lines, with a smoothing effect visible immediately after application. The film also retains water in the surface layers, keeping the skin looking smooth throughout the day rather than only at the moment of application.
It works on surface dehydration lines and uneven texture. It is one of the few active ingredients that does not require weeks of patience: the result is visible after the first application, making it a natural complement to active ingredients that work more deeply and over time.
In a well-designed formula, the two work together: ESP Seafill provides the immediate visible result that can be seen in the mirror that very morning, while peptides and antioxidants build the underlying result. This combination makes a routine sustainable because it offers something to see while waiting for what takes time. It naturally pairs withhyaluronic acid, with which it shares its work on the surface.
