Harvard professor Lawrence S. Friedman describes the primary gut problems we may be heir to, from ulcers to colorectal cancer. He is the faculty editor for the Harvard Health Publishing special health report Sensitive Gut. His talk includes a rundown of conditions like simple dyspepsia, ulcer, irritable bowel syndrome and more serious conditions like colitis and crohn's disease. Dr. Friedman makes a strong case for colon screening to combat colorectal cancer.