Dietary Management of Diarrhea in Children

Primary Foods and Beverages to Avoid

• The Centers for Disease Control and Prevention (CDC) recommends that children with diarrhea avoid foods high in simple sugars, such as soft drinks, undiluted apple juice, Jell-O, and presweetened cereals, as these worsen diarrhea through osmotic effects 1, 2, 3
• The CDC also advises avoiding foods high in fat, as they delay gastric emptying and are poorly tolerated during acute diarrheal illness 1, 2, 3

Recommended Foods and Beverages

• The CDC recommends continuing a regular diet with specific safe foods, including starches like rice, potatoes, noodles, crackers, and bananas 1, 2, 3
• The CDC also suggests cereals like rice, wheat, and oat cereals (unsweetened), as well as other safe foods like soup, yogurt, vegetables, and fresh fruits 1, 2, 3
• Breast milk should be continued on demand without interruption 2, 4
• Formula-fed infants should resume full-strength lactose-free or lactose-reduced formula immediately after rehydration 5, 4

Lactose Intolerance

• The CDC states that lactase deficiency must be distinguished from true lactose malabsorption, and many infants with lactase deficiency will not have clinical malabsorption 1, 2, 3
• Lactose intolerance should not be diagnosed based solely on stool pH or reducing substances without clinical symptoms 5, 4

Age-Specific Considerations

• Breastfed infants should continue nursing on demand, as breast milk reduces stool output compared to ORS alone 2, 4
• Formula-fed infants should resume full-strength lactose-free or lactose-reduced formula immediately after rehydration 5, 4
• Older children should continue a regular diet with emphasis on starches, cereals, and age-appropriate foods, and avoid unnecessary dietary restrictions 1, 2, 3

Common Pitfalls

• Prolonged use of the BRAT diet can result in inadequate energy and protein content in the recovering child's diet 1, 2, 3
• Diluting formula or delaying full-strength feeding can worsen nutritional outcomes and prolong diarrhea 4

Dietary Recommendations After Diarrhea

Immediate Feeding Strategy

• The Infectious Diseases Society of America strongly recommends resuming an age-appropriate usual diet during or immediately after the rehydration process is completed, as early refeeding improves nutritional outcomes 6
• Early refeeding (within 12 hours of beginning rehydration) is as safe and effective as delayed feeding and improves nutritional outcomes 6

Dietary Management for Infants

• Breastfeeding should be continued on demand without interruption throughout the entire diarrheal episode, as breast milk reduces stool output compared to oral rehydration solution alone 6, 7
• Lactose-free diets reduce diarrhea duration by approximately 18 hours and reduce treatment failure by half in children under 5 years 6

Foods to Avoid

• Foods high in simple sugars, such as soft drinks and undiluted apple juice, worsen diarrhea through osmotic effects and must be avoided, according to the Centers for Disease Control and Prevention 7
• Foods high in fat, such as fried foods and fatty meats, delay gastric emptying and are poorly tolerated, as recommended by the Centers for Disease Control and Prevention 7

Common Pitfalls

• The BRAT diet (bananas, rice, applesauce, toast) is reasonable but should not be used exclusively or prolonged, as it results in inadequate energy and protein content in the recovering child's diet, according to the Infectious Diseases Society of America and the Centers for Disease Control and Prevention 6, 7

Special Considerations

• Instructing patients to refrain from eating solid food for 24 hours does not appear to be useful, as early feeding decreases intestinal permeability, reduces illness duration, and improves nutritional outcomes, particularly important in settings where underlying malnutrition exists, as recommended by the Infectious Diseases Society of America 6
• Cereal-milk and cereal-legume diets have been used successfully for dietary management in older children, according to the Centers for Disease Control and Prevention 7

Dietary Management of Acute Diarrhea

Core Dietary Principles

• Patients with acute diarrhea should continue their usual age-appropriate diet immediately after rehydration, avoiding foods high in simple sugars and fats, while emphasizing starches, cereals, yogurt, fruits, and vegetables, as recommended by the Centers for Disease Control and Prevention 8, 9
• Older children and adults should maintain their usual diet during the diarrheal episode, with emphasis on well-tolerated foods, according to the Centers for Disease Control and Prevention 8, 9
• The outdated practice of "gut rest" or prolonged fasting actually impairs enterocyte renewal and increases intestinal permeability, as reported by the Centers for Disease Control and Prevention 10

Age-Specific Considerations

• Full-strength formulas reduce both stool output and duration of diarrhea by approximately 50% compared to gradual reintroduction in infants, as found by the Centers for Disease Control and Prevention 10

Critical Pitfalls to Avoid

• True lactose intolerance is indicated by worsening diarrhea upon introduction of lactose-containing foods, not just laboratory findings, and if true lactose intolerance occurs, temporarily reduce or remove lactose from the diet, as advised by the Centers for Disease Control and Prevention 8

Fluid Replacement Strategy

• Regardless of dietary regimen chosen, excess fluid losses must be replaced with oral rehydration solution (ORS), as recommended by the Centers for Disease Control and Prevention 8, 9
• Early rehydration with ORS combined with early refeeding is safer and more effective than IV therapy, according to the Centers for Disease Control and Prevention 10

Patient Education Points

• Warning signs requiring medical attention include decreased urine output, lethargy, or irritability, persistent vomiting preventing oral intake, diarrhea lasting more than 5 days, high fever, or bloody stools, as indicated by the Centers for Disease Control and Prevention 8, 9
• Caffeinated beverages, alcohol, and tobacco should also be avoided, as recommended by the American Society of Clinical Oncology 11