AUTHOR=Naderi Nassim TITLE=Editorial: Optimizing nutrition from the inside out: innovations in digestion, fermentation, and functional food processing JOURNAL=Frontiers in Food Science and Technology VOLUME=Volume 5 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/food-science-and-technology/articles/10.3389/frfst.2025.1707788 DOI=10.3389/frfst.2025.1707788 ISSN=2674-1121 ABSTRACT=Graphical AbstractOptimizing Nutrition from the Inside Out: Innovations in Digestion, Fermentation, and Functional Food Processing is depicted in a graphic divided into four sections. Each section includes an icon and a title with a brief explanation. Valorization of By-Products with stacked circles icon focuses on repurposing food waste into nutritional ingredients. Digestion and Bioavailability with a human silhouette icon aims at enhancing nutrient absorption. Encapsulation Technologies with a capsule icon targets improving the stability and delivery of bioactive compounds. Microbiota Modulation with a microorganism icon centers on influencing gut health via dietary interventions.