Lactococcus/Milk Ferment Lysate

Lactococcus/Milk Ferment Lysate is a fermentation-derived ingredient created by breaking down milk proteins using Lactococcus bacteria. The fermentation process yields a lysate—essentially the cellular contents released when the bacteria are lysed (broken down)—which contains small molecular weight peptides and amino acids.This ingredient is used in skincare formulations primarily for its potential to support skin hydration and barrier health. As a fermented milk derivative, it aligns with the growing interest in using fermentation technology to create bioactive compounds for cosmetic use.

The fermentation process breaks down milk proteins into smaller peptides and amino acids, which are more easily absorbed or utilised by the skin than whole proteins. These molecular fragments may act as humectants, drawing water into the skin, and as emollients that help seal moisture in.The ingredient may also support the skin's natural amino acid profile, which is important for maintaining proteins like keratin and collagen. However, the specific mechanisms by which fermented milk lysate works in skincare products are not extensively documented in peer-reviewed literature.

This ingredient is typically used as part of a broader skincare formula rather than as a standalone treatment. It is most effective when applied to clean, slightly damp skin to maximise hydration absorption. Use it consistently as part of your regular routine—results from hydrating ingredients are usually best seen with daily use over several weeks.

Lactococcus/Milk Ferment Lysate is generally well-tolerated by most skin types. Those with a dairy allergy should exercise caution, although fermentation may reduce allergenic potential; patch test first if concerned.