A study from researchers in Italy found that a split-dosage schedule of bowel preparation is the most effective method for bowel cleansing before colonoscopy. Colonoscopies performed within six to eight hours of the end of preparation were associated with significantly better cleansing than those performed more than eight hours after the end of preparation. This is the first study to demonstrate that the advantage of split-dosage intake is also true for low-volume bowel cleansing solutions.