What it is
Lactococcus ferment lysate is produced by culturing Lactococcus bacteria and then lysing, or breaking open, the cells to release their internal contents such as peptides, amino acids, and other metabolites. The resulting lysate is used in skincare as a skin-conditioning ingredient and is often included in products positioned around microbiome-friendly conditioning. In sunscreens it typically appears as a supporting active at low levels.
Safety & warnings
Ferment lysates are generally well tolerated in cosmetic formulas. People with very sensitive skin may wish to patch test, as with any new active ingredient.
Origin & sourcing
It is a biotechnology-derived ingredient obtained by fermenting Lactococcus bacteria and then lysing the cells to release their components.
Questions everyone asks
What is a ferment lysate?
It is the material released when cultured bacterial cells are broken open, yielding peptides, amino acids, and other metabolites used to condition skin.
Why is Lactococcus ferment lysate used in sunscreen?
It is included as a skin-conditioning ingredient, often in products marketed around microbiome support.