Preservative Postbiotics

Postbiotics serve as a multifunctional antimicrobial solution that breaks through the limitations of traditional preservatives. Their antimicrobial effects are based on multiple scientific mechanisms.

Firstly, organic acids such as lactic and acetic acid in postbiotics can lower the environmental pH, disrupting the integrity of pathogen cell membranes, with an antibacterial rate against Staphylococcus aureus reaching up to 92%.

Secondly, antimicrobial peptides like Nisin can specifically bind to the lipid II of pathogen cell walls, causing a pore-forming effect that kills bacteria.

Additionally, postbiotics can prevent the colonization of pathogenic bacteria by competitively inhibiting the occupation of nutrients and receptor sites, with experiments showing a reduction in Escherichia coli adhesion by up to 75%.

Lastly, postbiotics can interfere with quorum sensing by degrading signal molecules (such as AHLs) of pathogens, inhibiting the expression of their virulence factors.

These mechanisms work together to make postbiotics an effective antimicrobial agent.

Application areas: Food preservation, anti-corrosion of medical materials.