Sake Extract

Sake extract is a cosmetic-grade preparation derived from brewed Japanese rice wine (sake), processed by filtration and standardization to be appropriate for skin / hair use. It is distinct from drinkable sake and from sake lees (酒粕 / sake-kasu) extract — the latter is derived from the solid pressing residue. Sake extract concentrates amino acids, peptides, organic acids, and other secondary metabolites produced by the dual fermentation of rice with Aspergillus oryzae (koji) and Saccharomyces cerevisiae (sake yeast).

The connection between sake brewing and skin care traces to historical observation that sake brewers' hands were notably soft and pale despite long hours in cold sake houses. This led to commercial development from the early twentieth century of skincare products using sake-related ingredients (sake, sake-kasu, koji, rice bran). Several major Japanese sake breweries — including Kiku-Masamune, Hakutsuru, and others — operate dedicated cosmetic divisions producing sake-derived skincare lines.

Japan: cosmetic ingredient listed in the JCIA / JSCI labeling-name dictionary under '日本酒'; cosmetic preparations regulated under the Pharmaceutical and Medical Device Act for cosmetics. EU: rice / sake / Saccharomyces ferment-derived entries are listed in CosIng under various INCI names including 'Sake Extract' and 'Saccharomyces Ferment Filtrate'. US: ingredient categories appear in INCI dictionary; cosmetic finished products fall under FDA cosmetics regulation. China: NMPA IECIC listing applies — verify specific preparation. Korea: MFDS handles cosmetic ingredient notification.

Sake extract delivers free amino acids (notably proline, glutamic acid, alanine, serine — natural moisturizing factors related to skin NMF), small peptides, organic acids (succinic, lactic, malic), trace polyphenols, and Saccharomyces / Aspergillus secondary metabolites. The amino acid and peptide fraction is associated with skin-conditioning and humectant function in formulator literature. Specific bioactive standardization varies by supplier and preparation.