Lactobacillus … Ferment Filtrate

This ingredient is a ferment filtrate derived from blueberry fruit combined with beneficial bacteria (Lactobacillus and Leuconostoc strains). The fermentation process breaks down the blueberry's natural compounds, creating a liquid extract rich in amino acids, organic acids, and antioxidant polyphenols.In skincare formulations, it functions as a humectant and skin conditioner. The humectant properties help draw moisture into the skin's outer layers, whilst the conditioning agents support the skin barrier and overall skin feel.

Fermentation breaks down the blueberry fruit's cell walls and converts its sugars and phenolic compounds into smaller, more bioavailable molecules. This creates a filtrate rich in amino acids, lactic acid, and water-soluble antioxidants.When applied to skin, the humectant components (amino acids and organic acids) bind water and hold it in the stratum corneum, improving hydration. The antioxidant polyphenols may help neutralise environmental stressors, though their stability in formulations varies depending on pH, packaging, and preservatives.

This ingredient is typically found in serums, essences, toners, and moisturisers. It works well in hydrating formulas and pairs effectively with other humectants such as glycerin or hyaluronic acid. Apply to clean skin before heavier creams. No special frequency restrictions; use as part of your daily routine. If the product contains lactic acid, introduce it gradually if your skin is sensitive to exfoliating acids.

Generally well-tolerated across skin types. As a fermented extract with mild acidity, it may cause irritation in very sensitive skin or if used excessively; patch test first if you have known sensitivities to fermented ingredients or lactic acid.