Lactobacillus/Spirulina Ferment Filtrate

Lactobacillus/Spirulina Ferment Filtrate is a bioactive ingredient created through the fermentation of spirulina (a nutrient-dense blue-green algae) using Lactobacillus cultures. The fermentation process breaks down the algae's cell walls and generates metabolites—small molecules produced during microbial activity—that may offer skin benefits distinct from unfermented spirulina.In formulation, this ingredient functions primarily as an antioxidant and skin protectant. The filtrate is the liquid portion collected after fermentation, which concentrates these bioactive compounds whilst removing…

Spirulina is rich in proteins, beta-carotene, polysaccharides and phenolic compounds—all known antioxidants. During fermentation, Lactobacillus cultures metabolise and modify these compounds, potentially increasing their bioactivity and skin penetration. The resulting filtrate delivers these antioxidants and metabolites to the skin's surface.These molecules work by donating electrons to unstable free radicals, neutralising them before they can damage skin cells and collagen. Additionally, the fermentation byproducts may support the skin's natural antioxidant enzyme systems.

This ingredient is typically incorporated into serums, essences, creams and masks. It works well in layered routines and can be used alongside other antioxidants such as vitamin C or niacinamide, though patch testing is advisable when combining multiple actives. As with most fermented botanicals, consistency of use will yield more noticeable results than occasional application.

Lactobacillus/Spirulina Ferment Filtrate is generally well-tolerated across skin types. Those with sensitivity to fermented products or algae should perform a patch test first.