DEAR DOCTOR K: As I've entered my 70s, I've noticed that my eating and bowel habits have changed. Is this normal?
DEAR READER: Well, I could tell you what it says in the medical textbooks, or I could speak from personal experience. The answer would be the same: It sure is normal. Aging most definitely affects our eating and bowel habits. The human digestive system -- our gastrointestinal (GI) tract, or "gut" -- is a series of hollow organs linked to form a long, twisting tube. It begins at the mouth and winds down through the esophagus, stomach, small intestine and colon. These organs break down food into components that the body can absorb and use for energy. What's left is expelled by an efficient disposal system.