Opinion: The evidence is clear: A liquid-only diet before a colonoscopy is unnecessary

Since colorectal cancer is on the rise in people younger than age 50, national guidelines have recently pushed the starting age for colorectal cancer screening down to 45. We need to spread the word.

Yet we specialists continue to provide outdated and disproven recommendations on colonoscopy bowel preparation that make the process more difficult for the millions of patients who undergo colonoscopy every year: We tell them to adopt a clear liquid diet the day before their procedure.

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