Rice Ferment Filtrate
Sake ferment
No meaningful concern for most people; irritation is possible but rare.
Also written as: Sake · Saccharomyces/Rice Ferment Filtrate · Rice Wine Filtrate · Oryza Sativa Ferment Filtrate
What it is
Rice ferment filtrate is what remains after rice is fermented, traditionally in sake brewing, and the solids are filtered out. It contains amino acids, sugars, peptides and organic acids that act as humectants. Japanese brands popularised it after observing the soft hands of sake brewery workers.
What it does well
Provides light hydration and a smoother skin surface
The amino acids and sugars in the filtrate are genuine humectants, giving a measurable short-term hydration benefit. Claims about brightening and pore refinement are not well supported by controlled trials.
Limited evidence
Worth knowing
May contain residual alcohol
Some sake-derived filtrates retain small amounts of ethanol, which a few people with reactive skin find drying or stinging. Levels are usually low, and the INCI list will name alcohol separately if it is present in meaningful amounts.
Matters most toPeople whose skin stings with alcohol-containing products.
Where the EU stands
No specific restriction
No EU concentration limit or annex restriction. Listed in the EU cosmetic ingredient database as a skin-conditioning and humectant ingredient.
