Pseudoalteromonas Ferment Extract

What it does

A sugar-based polymer made by fermenting a marine bacterium. Under the trade name Matmarine it is sold as an oil-control, mattifying active; the same INCI name also covers other marine ferments sold for different purposes.

Benefits

Only supplier data exist: lab tests on oil-gland cells and supplier trials reporting less shine after application. No independent peer-reviewed human trials were found.

Concerns & Risks

None well established, but there are no independent safety or efficacy studies on this specific ingredient — every claim traces back to the supplier.