Bulletin Today | Personal HealthIn a surprising reversal of what doctors have been telling older patients for 40 years, a new study suggests that eating a high-fiber diet to protect against the intestinal disorder diverticulosis doesn’t work. Diverticulosis, a disease that causes pouches on the wall of the colon (see photo, left), affects about half of Americans by age 60, with two-thirds developing the condition by age 85, according to the National Institute of Diabetes and Digestive and Kidney Diseases. Many suffer only mild …