The system includes one or more devices to improve performance of selected internal organs by stimulating the organs through vibrating action. Sources of vibration include a capsule, which can be swallowed, or a larger member that is introduced through the rectum or esophagus or applied into the abdominal cavity with or without incision. These vibration sources are either implanted and inserted for natural passage along the digestive tract, or they are retained at the end of a flexible shaft to reach their intended placement from access through the mouth or rectum. The vibrating capsule can be swallowed as well as implanted and released for natural passage along the small intestine and colon.