Dietary Management of Diarrhea

Core Dietary Restrictions

The American Gastroenterological Association recommends avoiding high-fat foods, dairy products (except yogurt and firm cheeses), caffeine, alcohol, artificial sweeteners (especially sorbitol), spicy foods, and high-fiber/insoluble fiber foods during any type of diarrhea 1, 2
The National Institute of Nutrition suggests avoiding fatty and fried foods, as they trigger diarrhea most frequently 1, 2
The American College of Nutrition advises avoiding milk and most dairy products (except yogurt and firm cheeses) due to potential lactose intolerance during diarrheal episodes 1, 3, 4
The European Society for Clinical Nutrition and Metabolism recommends completely eliminating sorbitol found in sugar-free sweets, chewing gum, drinks, and diabetic/slimming products 2
The American Heart Association suggests restricting coffee and tea to maximum 3 cups per day, or eliminating entirely during acute episodes 1, 2
The National Institute on Alcohol Abuse and Alcoholism advises avoiding all alcoholic beverages and fizzy/carbonated drinks 1, 2

The American Gastroenterological Association recommends avoiding spicy foods and seasonings, as they directly irritate the gastrointestinal tract 1
The National Institute of Diabetes and Digestive and Kidney Diseases suggests limiting whole-meal or high-fiber flour and breads, cereals high in bran, whole grains (like brown rice), and insoluble fiber sources 2
The European Food Safety Authority recommends avoiding resistant starch found in processed or recooked foods, as it resists digestion and reaches the colon intact, worsening diarrhea 2
The American College of Nutrition advises limiting excess fresh fruit to 3 portions per day (approximately 80g each), as larger quantities can trigger symptoms 2
The National Institute of Nutrition suggests avoiding gas-producing foods, such as cauliflower, legumes, beans, salads, and certain vegetables, as they can worsen bloating and diarrhea 3
The Centers for Disease Control and Prevention recommends avoiding raw or undercooked foods, such as raw eggs, undercooked poultry/meat/seafood, unpasteurized dairy, and unwashed produce, to prevent infectious diarrhea 4

The American Gastroenterological Association recommends drinking at least 8 cups of fluid per day, focusing on water or non-caffeinated drinks like herbal teas 2
The Centers for Disease Control and Prevention advises avoiding contaminated water sources, such as lakes or rivers, and boiling water for >12 minutes during boil-water advisories 4
The World Health Organization recommends replacing ongoing losses with oral rehydration solutions when appropriate, giving 10 ml/kg for each liquid stool 5

The American Society for Parenteral and Enteral Nutrition recommends avoiding simple sugars and high glycemic index foods, reducing fat consumption, and customizing menus for post-surgical diarrhea (bariatric surgery) 3
The American Cancer Society suggests reducing insoluble fiber intake and avoiding milk and dairy products (apart from yogurt and firm cheeses) during chemotherapy for cancer treatment-related diarrhea 1
The Crohn's and Colitis Foundation recommends avoiding fibrous, plant-based raw fruits and vegetables if strictures are present, and cooking and processing fruits and vegetables to soft consistency before eating for inflammatory bowel disease 6

The American Academy of Pediatrics recommends not using antidiarrheal medications in neonates or children under 2 years due to life-threatening risks 5
The World Health Organization advises not diluting formula or delaying full-strength feeding in infants, as this worsens nutritional outcomes and prolongs diarrhea 5
The National Institute of Diabetes and Digestive and Kidney Diseases suggests not assuming all fiber is beneficial, as insoluble fiber may worsen symptoms, while soluble fiber (like oats) may help 2
The Centers for Disease Control and Prevention recommends avoiding cross-contamination by washing hands, cutting boards, and utensils thoroughly after contact with uncooked foods 4