Bavaricins are bacteriocins produced by Lactobacillus species, antimicrobial peptides that inhibit competing bacteria, particularly closely related Gram-positive organisms. In fermented foods, bavaricin-producing starter cultures can suppress spoilage organisms and pathogens, adding a natural preservation hurdle alongside acidity, salt, and refrigeration. They exemplify how the protective-cultures movement turns microbial competition into food-safety technology, offering clean-label protection without synthetic preservatives. Research continues into their spectrum, stability under processing conditions, and regulatory status, since bacteriocin-producing cultures sit at the intersection of starter culture and food additive regulation in different jurisdictions.