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A diarrhea diet is used to help alleviate diarrhea, a condition characterized by unusually frequent bowel movements and excessive evacuations of watery stools.
Diarrhea is a symptom that is not only uncomfortable, but also dangerous to health, as it is usually indicative of an underlying infection. Some causes of diarrhea include:
(Illustration by GGS Information Services/Thomson Gale.)
In most diarrhea cases, treatment first seeks to prevent the body from losing too much fluid (dehydration) and the salts and minerals required by the body (electrolytes). A diarrhea diet accordingly includes drinking plenty of water. However, broths and soups that contain sodium, and fruit juices, mineral water, soft fruits, or vegetables that contain potassium, are also extremely important to restore the electrolyte levels and correct nutritional deficiencies. Until the diarrhea stops, it is also recommended to avoid caffeine, milk products, and foods that are high in fiber, or very high in simple sugars, as they tend to aggravate diarrhea. For example, soft drinks, undiluted fruit juices, and presweetened cereals should be avoided. Also, fried or fatty foods should be avoided because of their tendency to delay stomach emptying. Carbonated drinks can also affect intestinal contractions and make diarrhea worse. A heath care practitioner may also recommend the BRAT diet that includes bananas, plain rice, applesauce, and toast.
Some specific diarrheas have their own dietary requirements. For instance, avoiding dairy products in cases of lactose intolerance, or gluten in cases of malabsorption. Diarrhea caused by antibiotics can also be reduced by taking probiotic yogurt with live active cultures.
As the diarrhea improves, soft, bland foods can usually be added to the diet, supplementing bananas, plain rice, and toast with boiled potatoes, crackers, cooked carrots, and baked chicken without the skin or fat. Other recommended foods include cereals (rice, wheat, and oat cereals), and yogurt. Once the diarrhea has stopped, a person can usually return to a normal and balanced diet. The Schiffert Health Center offers the following dietary tips for the first several days after experiencing diarrhea:
The primary function of a diarrhea diet is to assist the treatment seeking to correct the cause. This almost always includes preventing dehydration and replenishing lost electrolytes, especially serious in babies and young children. In serious cases, a physician may also recommend electrolyte solutions, available at drugstores. Medicines that stop diarrhea may be helpful, but they are not recommended for people whose diarrhea is caused by a bacterial infection or a parasite, because the diarrhea helps to purge the pathogen. Viral infections are either treated with medication or left to run their course, depending on the severity and type of virus.
Certain foods are considered beneficial such as bananas because they contain potassium, required to control the body’s fluid balance, while boiled rice and toast provide low-fiber carbohydrates that do not irritate the bowel. Applesauce has a low GI and low fiber.
content. To get the digestive system working properly after diarrhea, it is necessary to rebuild the intestinal flora, especially if antibiotics were taken. Eating pro-biotic yogurt (with acidophilus) helps restore the intestinal flora.
For most people, any liquid that they normally drink should be adequate to bring fluid levels back to normal (rehydration). However, too much water alone, at any age, can be harmful, because water does not have any sugars or important electrolytes, such as sodium. This is why the diet must include foods and drinks that restore electrolyte levels. In this respect, mineral water is recommended. Signs of dehydration include:
Very young infants also pose special problems because their risk of dehydration is much higher. They should be given a bottle frequently. A pediatrician may recommend solutions such as Pedialyte as these fluids also contain the necessary salts lost with diarrhea. Salt tablets should never be used as they may worsen diarrhea.
Diarrhea is often caused by foodborne or water-borne pathogens. The Mayo Clinic offers the following advice to prevent food contamination at home:
There are no risks associated with a bland diet or with drinking liquids that replenish fluid levels as long as electrolytes are also provided.
There is broad consensus among health practitioners that a bland diet combined with replenishing lost fluids and electrolytes is beneficial to treat most cases of diarrhea.
The Division of Digestive Diseases and Nutrition at the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) supports basic and clinical research into gastrointestinal conditions, including diarrhea. Among other areas, NIDDK researchers are studying how the processes of absorption and secretion in the digestive tract affect the content and consistency of stool, the relationship between diarrhea and pathogenic bacteria, motility in chronic diarrhea, and chemical compounds that may be useful in treating diarrhea.
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U.S. Department of Agriculture, Food Safety and Inspection Service. Meat and Poultry Hotline: 1-888-MPHotline (1-888-674-6854). <www.fsis.usda.gov>
U.S. Environmental Protection Agency. 1200 Pennsylvania Avenue, NW, Washington, DC 20460. 202-272-0167. <www.epa.gov>
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Monique Laberge, Ph.D.