The Quantitative Calprotectin (Fecal) Test measures a protein in your stool to detect and gauge inflammation in the gastrointestinal (GI) tract, helping doctors tell the difference between serious conditions like Inflammatory Bowel Disease (IBD) (Crohn’s, Ulcerative Colitis) and less serious issues like Irritable Bowel Syndrome (IBS), and also to monitor IBD treatment effectiveness without invasive procedures like colonoscopies. High levels indicate active inflammation, while low levels suggest healing or a non-inflammatory cause