Kluyveromyces … Ferment Filtrate

This ingredient is a fermented filtrate combining Kluyveromyces and Lactobacillus (beneficial microorganisms) with evening primrose flower oil. Fermentation breaks down the plant material into smaller, more bioavailable compounds whilst the probiotic cultures may contribute their own active metabolites to the final extract.The resulting filtrate functions primarily as an antioxidant and skin conditioning agent. Evening primrose is traditionally valued for its fatty acid profile, whilst the fermentation process may enhance or modify its properties through microbial metabolism.

Fermentation alters the chemical structure of evening primrose oil, creating compounds that may penetrate the skin more effectively than the unfermented plant oil alone. The probiotic cultures (Kluyveromyces and Lactobacillus) produce metabolites during fermentation—such as lactic acid and other organic acids—which can contribute antimicrobial and pH-balancing properties.Once applied, the extract's antioxidants work to neutralise free radicals, whilst the conditioning compounds coat the skin surface to improve hydration and tactile feel. The exact mechanism of any probiotic benefit to skin …

This ingredient is typically found in serums, moisturisers and essences at modest concentrations. It works well in layered routines and pairs safely with most actives, though as with any new product, introduce it gradually to monitor tolerance. No special storage precautions are usually necessary, though keeping products in cool conditions will preserve antioxidant potency.

Generally well-tolerated by most skin types. Those with fermentation sensitivities or lactic acid sensitivity should patch-test first. The ingredient is considered safe in cosmetic use at typical concentrations.