Maria Adams, MS, MPH, RD
A clear liquid diet is a diet consisting of foods and beverages made from liquids that you can see through. This type of diet is easily digested and leaves no residue in the gastrointestinal tract.
In the past, a clear liquid diet was routinely prescribed for hospitalized patients, often for several days. These days, though, it is generally avoided, unless absolutely necessary. A clear liquid diet may be necessary when the gastrointestinal tract needs to be free of food or needs to rest, for instance:
Although this diet allows for adequate hydration, it does not provide enough calories and nutrients. Therefore, be sure your doctor is following you closely while you are on this diet. Also, do not stay on this diet for more than a few days.
Sugar, salt, and pepper are also allowed.
Any foods not on the above list, including:
American Gastroenterological Association
National Digestive Diseases Information Clearinghouse
Dietitians of Canada
Public Health Agency of Canada
Clear liquid diet. Academy of Nutrition and Dietetics website. Available at:
http://nutritioncaremanual.org/vault/editor/Docs/Clear%20Liquid%20Diet.pdf. Accessed February 13, 2013.
Colonoscopy. EBSCO DynaMed website. Available at:
http://www.ebscohost.com/dynamed/what. Updated January 15, 2013. Accessed February 13, 2013.
Jackson F. Clear liquid diet. Jackson Siegelbaum Gastroenterology website. Available at:
https://gicare.com/diets/clear-liquid-diet/. Accessed February 13, 2013.
Last reviewed September 2013 by Dianne Scheinberg Rishikof MS, RD, LDN
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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