Lactobacillus/Sodium Hyaluronate Ferment Filtrate

This ingredient is a ferment filtrate derived from Lactobacillus (a beneficial bacterium) combined with sodium hyaluronate, a naturally occurring humectant. The fermentation process breaks down bacterial cell components into smaller molecular fragments, which are then filtered to create a liquid concentrate.In skincare formulations, it functions as a skin conditioning agent and emollient, designed to support hydration and the skin's natural moisture barrier.

Sodium hyaluronate is a humectant, meaning it binds water molecules and draws them into the outer layers of the skin. This basic hydrating mechanism helps plump the skin and reduce the appearance of fine lines caused by dehydration.The fermented Lactobacillus component is thought to support skin conditioning through its constituents, though the exact mechanisms remain less well characterised than sodium hyaluronate alone. The fermentation process may create metabolic byproducts that have skin-soothing properties, though this varies depending on the fermentation method and end product.

This ingredient is typically incorporated into serums, toners, moisturisers and essences. Apply to clean, damp skin and layer with other hydrating or treatment products as needed. Because it is a hydrating ingredient rather than an active treatment, it can be used daily. If your formula contains it alongside actives like retinoids or acids, apply it after those treatments to support barrier health.

Generally well-tolerated across skin types. Those with severe bacterial sensitivity or fermentation sensitivities should patch test first, though adverse reactions are uncommon.