What it is
Bacillus ferment filtrate is the liquid recovered after culturing bacteria of the genus Bacillus, retaining soluble metabolites and biomolecules from the fermentation. In cosmetics it is used as a skin-conditioning ingredient that can help support a smooth, hydrated skin feel. In a sun cream it functions as a supporting conditioning component and does not provide ultraviolet protection.
Safety & warnings
Ferment filtrates of this kind are generally well tolerated in skin care. As a microbial fermentation product, individuals with relevant sensitivities should use appropriate caution and consider patch testing. It is not a recognized fragrance allergen and is not an oil, so comedogenicity is not a typical concern.
Origin & sourcing
Biotechnological; the filtered liquid obtained from fermenting Bacillus bacteria, containing soluble fermentation metabolites.
Questions everyone asks
What is Bacillus ferment filtrate?
It is the filtered liquid left after fermenting Bacillus bacteria, used in cosmetics as a skin-conditioning ingredient.
Does it function as a sunscreen filter?
No. It is a conditioning fermentation ingredient and does not absorb or scatter ultraviolet light.