This workshop explores the fundamentals of functional nutrition with a special focus on the gut microbiome and its connection to digestion, metabolism, immunity, and the gut-brain axis. It covers dietary and lifestyle factors that influence gut health, common disruptors, and strategies to support a healthy microbiome. A practical case study demonstrates how functional nutrition principles can be applied to identify root causes and develop personalized interventions. Participants will also learn about the role of fiber, prebiotics, probiotics, polyphenols, and anti-inflammatory foods in promoting gut health. The session highlights practical strategies for improving metabolic health, reducing inflammation, and developing sustainable nutrition and lifestyle habits.