What it is
Oryza Sativa Lees Extract is prepared from rice lees, the sediment remaining after the fermentation of rice during processes such as sake brewing. The lees contain amino acids, sugars, and other fermentation-derived compounds that contribute conditioning and moisturizing properties. It is used in brightening and moisture-focused sun essences and milks, particularly in Japanese-style formulations.
Safety & warnings
Rice lees extract is generally well tolerated. Because it is a fermentation-derived material, individuals with known sensitivities to fermented ingredients may wish to patch test.
Origin & sourcing
Natural; derived from the lees (fermentation sediment) of Oryza sativa (rice), a by-product of rice fermentation such as sake brewing.
History
Rice lees from sake brewing have a long tradition of use on skin in Japan, which informs the modern cosmetic use of rice lees extract.
Questions everyone asks
What are rice lees?
Rice lees are the sediment left after fermenting rice, for example during sake brewing, and are the source of this extract.
What does rice lees extract do in skincare?
It provides amino acids and fermentation-derived compounds that act as conditioning and moisturizing agents.