Christoph Wittmann is a Professor of Biotechnology and Director of the Institute of Systems Biotechnology at Saarland University, Germany. His research focuses on metabolic engineering, industrial biotechnology, and microbial production of valuable compounds for food, health, and sustainability. An expert in systems biology and bio-based production, he has contributed significantly to advancing biotechnology applications. As Guest Editor, he brings deep expertise in food biotechnology, particularly in microbial fermentation, metabolic engineering for functional ingredients, and the development of sustainable bioprocesses for the food industry.