Lactobacillus … Ferment

This ingredient is a fermentation product combining lactobacillus (a beneficial bacterium), milk solids, and soybean oil. The fermentation process breaks down these components into smaller molecules that can be more readily absorbed by the skin.In skincare formulations, it functions primarily as a humectant—drawing moisture into the skin—and as a skin conditioner, helping to soften and smooth the skin barrier. The fermentation process may also yield byproducts such as amino acids and organic acids that contribute to its conditioning properties.

The fermentation process breaks down milk proteins and soybean oil into smaller, more bioavailable compounds including amino acids, peptides, and organic acids. These smaller molecules can penetrate the outer layer of skin more effectively than their larger precursors.Once in the skin, the humectant components attract and bind water molecules, increasing hydration levels. The amino acids and peptides also help reinforce the skin's natural moisturising factor (NMF), contributing to improved skin conditioning and a smoother appearance.

This ingredient is typically used as part of a broader formulation rather than in isolation. It works well in serums, essences, moisturisers, and hydrating masks. Apply to clean skin as part of your regular routine; no special timing or frequency restrictions apply. It pairs well with other hydrating and conditioning ingredients.

Generally well-tolerated in cosmetic formulations. Those with dairy sensitivities should review full ingredient lists, though fermented milk components are often well-tolerated by sensitive skin.