What it is
Saccharomyces ferment filtrate is produced by fermenting Saccharomyces yeast and then filtering out the cells to leave a liquid rich in the small molecules generated during fermentation, such as amino acids, peptides, and other metabolites. In cosmetics it is valued as a skin-conditioning and moisturizing ingredient. It is a common feature of fermentation-focused Korean and Japanese formulations.
Safety & warnings
Saccharomyces ferment filtrate is generally well tolerated and used across many leave-on products. As with any fermentation-derived complex of metabolites, individual sensitivities are possible but uncommon.
Origin & sourcing
A biotechnology-derived ingredient made by culturing Saccharomyces yeast and filtering the fermentation broth.
History
Ferment filtrates rose to prominence through Japanese and later Korean skin care, where fermentation is a long-standing theme, and they are now widely used internationally.
Questions everyone asks
How is saccharomyces ferment filtrate made?
Saccharomyces yeast is fermented, then the yeast cells are filtered out, leaving a liquid containing the metabolites produced during fermentation.
What does it do in a sunscreen?
It acts as a skin-conditioning and humectant ingredient, helping the formula feel hydrating and comfortable.