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The Curious Bag
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People who are soon to have a colonoscopy are put on a fairly restrictive diet. No solids can be consumed while prepping for colonoscopy, and there are also limitations on the kinds of liquids that can be consumed.
Plain Liquids
Black (without cream, milk or other additions) coffee and tea, broth or bullion without fat, and water are permissible before a colonoscopy, according to Medline Plus.
Others
Other acceptable liquids before a colonoscopy, according to Medline Plus, include strained fruit juice, gelatin and sports drinks.
Color
The liquids that can be consumed before a colonoscopy are to be "clear," and nothing red or purple should be consumed, according to the University of Michigan Health System.
Time Frame
Dietary preparation may begin one or two days before the test, depending on the doctor's directions, according to the University of Michigan Health System.
Considerations
People who forget their prep instructions should consult the written instructions provided by their doctors, according to the National Digestive Disease Information Clearinghouse.
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