What it is
Saccharomyces/Barley Seed Ferment Filtrate is the filtered liquid obtained after fermenting barley seed material with Saccharomyces yeast, yielding a mix of small metabolites, sugars, peptides, and amino acids. In sunscreen and skincare formulas it is used as a skin-conditioning and humectant ingredient that can support a soft, hydrated feel. It is typically included at low to moderate levels as a supporting active.
Safety & warnings
Ferment filtrates are generally well tolerated in cosmetic use. Because the substrate is barley, individuals who track grain-derived ingredients may wish to note its origin, though the material is a processed filtrate; as with any botanical-derived ferment, occasional sensitization is possible.
Origin & sourcing
Produced by biofermentation: Saccharomyces yeast is cultured on barley seed substrate and the broth is filtered to give the ferment filtrate.
Questions everyone asks
What is a ferment filtrate?
It is the filtered liquid left after microorganisms ferment a substrate; here yeast ferments barley seed material, producing a conditioning ingredient.
Does it help with sun protection?
No. It is a skin-conditioning ingredient and does not provide UV protection.