What it is
Leuconostoc ferment filtrate is the liquid obtained by fermenting a substrate with Leuconostoc, a lactic acid bacterium, and then filtering out the cells. The resulting filtrate contains antimicrobial peptides and other metabolites that help support product preservation while also conditioning the skin. It is widely used in formulas seeking natural-derived preservation alternatives.
Safety & warnings
Leuconostoc ferment filtrate is generally well tolerated in topical use. Some sensitive individuals may experience mild irritation from ferment-based ingredients, so patch testing is reasonable for reactive skin. It is not considered comedogenic at typical use levels.
Origin & sourcing
Natural-derived; produced by fermenting a carbohydrate substrate (commonly radish root) with Leuconostoc bacteria, after which the biomass is filtered away to yield the active filtrate.
Questions everyone asks
Does Leuconostoc ferment filtrate help preserve products?
Yes, it contains antimicrobial metabolites and is often used to support natural-derived preservation in cosmetic formulas.
Is it the same as radish root ferment filtrate?
It is closely related; radish root ferment filtrate is a common version produced by fermenting radish with Leuconostoc bacteria.