Case Study: Sarah and the Serotonin Rollercoaster Sarah, a 32-year-old marketing professional, has battled Irritable Bowel Syndrome (IBS) for over five years. Her life revolves around bathrooms, unpredictable bowel movements, and a constant knot of anxiety in her stomach. IBS-D (diarrhea-predominant) dictates Sarah’s daily schedule. Mornings often start with urgent dashes to the toilet, leaving...