How is increased intestinal permeability different from irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD)?

While there may be overlap in symptoms, increased intestinal permeability is a condition where the lining of the intestine becomes more permeable, allowing harmful substances to enter the bloodstream. IBS and IBD are specific gastrointestinal disorders that might have increased intestinal permeability as one of their features but have distinct diagnostic criteria and clinical presentations.