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Summary: Before a colonoscopy, people generally are told to switch to a liquid diet 24 hours before and to avoid red-colored foods several days before. Prepare for a colonoscopy for the most accurate results with helpful information from an oncology specialist and assistant professor of medicine in this free video on cancer.
Dr. Jeffrey Meyerhardtis a leading expert on colonoscopy at Dana-Farber Cancer Institute in Boston, Mass.read more
"A colonoscopy is the best way to look to determine if someone has a problem in their colon. People should get screened with colonoscopies. The current recommendations for the general society is to screen at age 50. There are some patients where we would start screening earlier, depending if they have a family history, or certain diseases that put them at a higher risk. There are ... the issue of a colonoscopy is one has to prepare for a colonoscopy before the actual procedure, and that includes changing somewhat your diet for the several days before the colonoscopy, as well as doing a prep to clean out the bowels so that the person who does the endoscopy is able to see well the colon wall inside. So the preparation terms of food you eat before a colonoscopy does depend a little bit on the individual patient. So in general you don't eat at least 12, and generally 24 hours prior to colonoscopy. One will turn to really just a liquid diet about 24 hours prior to colonoscopy. For some patients, particularly ones who've had a colonoscopy, and haven't had as good of a preparation, those recommendations may extend even to a little bit longer time frame before the colonoscopy. There are certain dietary things, like avoiding red things, like red Jello and red foods, to avoid a few days prior to the colonoscopy. All these are described by the gastrologist, or the gastrologist assistant, before your colonoscopy, to tell you how to change your diet and when to start preparing."
eHow Article: What to Eat Before a Colonoscopy