Saccharomyces … Ferment Filtrate

This ingredient is a fermented filtrate combining Saccharomyces (a type of yeast), olive fruit oil, and glycerin. During fermentation, the yeast breaks down and transforms the olive oil and glycerin, creating a refined conditioning agent that is gentler and more readily absorbed than unfermented oil alone.The fermentation process produces small molecular compounds and glycerol-based emollients that work to soften the skin barrier and improve moisture retention without the heaviness often associated with traditional plant oils.

The fermented filtrate functions primarily as an occlusive and humectant. The glycerin component is hygroscopic, meaning it attracts water molecules from both the environment and deeper skin layers, drawing them into the epidermis. Meanwhile, the olive oil-derived fatty acids form a breathable occlusive layer that prevents transepidermal water loss.Because fermentation breaks down larger oil molecules into smaller, more easily penetrating forms, this ingredient can deliver conditioning benefits without sitting heavily on the skin surface.

This ingredient is typically found in serums, moisturisers, and facial oils at relatively low concentrations. It generally plays a supporting conditioning role rather than serving as the primary active. Apply to clean, damp skin for optimal hydration benefits, or layer beneath your regular moisturiser. No special precautions are needed for frequency—it can be used daily as part of your routine.

This ingredient is generally well-tolerated and unlikely to cause irritation in most people. Those with olive oil sensitivity should patch-test first, though sensitivity to fermented olive extracts is uncommon.