Microbial Bioactives in Fermented Foods: EVs, Metabolites, and Immune Health

Fermented foods represent one of humanity’s oldest functional food traditions, yet their mechanistic underpinnings have only recently become scientifically tractable. Over the past 2–3 years, research has converged on microbial-derived extracellular vesicles (EVs) and metabolites—including short-chain fatty acids, bacteriocins, and post-biotics—as critical active principles mediating the health benefits of fermentation. This discovery has catalyzed growing investment from both academic researchers and the food biotech industry, evidenced by increased funding for fermentation optimization, regulatory interest in live biotherapeutic products, and expanding markets for functional foods backed by mechanistic science.This Research Topic addresses the emerging intersection of fermentation science, food biotechnology, and nutritional immunology. We seek to integrate knowledge on how fermented food fermentation generates bioactive EVs and metabolites, how food matrices influence their stability and delivery, and how these bioactives modulate human intestinal barrier function and immune homeostasis—from bench to product development to clinical application.Key Themes• Fermentation microbiology & bioactive production: Strain selection, process optimization, and temporal bioactive dynamics across diverse fermented food types• Food matrix effects & bioavailability: How food components and processing methods preserve or degrade EVs and metabolites; predicting and measuring gastrointestinal delivery• Mechanistic immunology & host interactions: Host receptor signaling, intestinal barrier integrity, innate immune activation, and dysbiosis prevention via food-derived bioactives• Translational & clinical aspects: Pre-clinical efficacy, clinical trial design, regulatory pathways, safety assessment, and real-world health outcomes for fermented food bioactives• Standardization & product development: EV and metabolite characterization protocols, quality control, scale-up strategies, and commercial product formulationThis Research Topic welcomes original research, reviews, methods papers, and translational studies that bridge discovery science with functional food innovation and nutritional health outcomes. Topic editors: Graciela L Lorca, Kanthi Kiran Kondepudi, Irma Schabussova Source: https://www.frontiersin.org/research-topics/83487/microbial-bioactives-in-fermented-foods-evs-metabolites-and-immune-health