The best foods to eat during a bout of diarrhea are plain, low-fat, and easy to digest: white rice, bananas, plain toast, boiled potatoes, clear broth, and cooked carrots are all solid choices. But you don’t need to limit yourself to a tiny list. The current medical guidance is to return to a normal, balanced diet as soon as you can tolerate it, because reintroducing food early actually helps your gut recover faster by reducing intestinal permeability and improving nutritional outcomes.
Why Eating Sooner Helps
The old advice was to fast or stick to clear liquids until diarrhea passed. That’s outdated. Eating as soon as you can tolerate food shortens illness duration and keeps your body from losing the nutrients it needs to heal. There’s no evidence that any single “diarrhea diet” works better than a regular, age-appropriate diet, so the goal is simply to choose foods that are gentle on your gut while still providing protein, calories, and vitamins.
Foods That Help Firm Up Stool
Soluble fiber is your best friend during diarrhea. It absorbs water in the intestines and forms a gel-like material that slows digestion and adds bulk to loose stool. Good sources include oats (plain oatmeal, not the sugary instant kind), bananas, cooked carrots, peeled apples or applesauce, barley, and white rice. These foods are also bland enough that they’re unlikely to trigger nausea or cramping.
Other well-tolerated options include plain crackers or toast (white bread is easier to digest than whole grain during illness), boiled or baked potatoes without butter, skinless chicken breast, eggs, and clear soups or broths. Broth-based soups are especially useful because they provide both fluid and sodium, two things your body is losing rapidly.
The BRAT Diet: Useful but Limited
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. These four foods are bland and easy on the stomach, and it’s fine to lean on them for a day or two. But as Harvard Health notes, there’s no reason to restrict yourself to only those four items. They’re low in protein, fat, and several key nutrients your body needs to recover. Think of BRAT foods as a starting point, not a complete plan. Add in lean protein like chicken or eggs, and cooked vegetables like carrots or squash, as soon as you feel up to it.
Hydration Matters More Than Food
Replacing lost fluids and electrolytes is the single most important thing you can do. Water alone isn’t enough because diarrhea flushes out sodium, potassium, and other minerals. Oral rehydration is the preferred method, and you can make a simple rehydration drink at home using the WHO formula: 8 level teaspoons of sugar and 1 level teaspoon of salt dissolved in 1 liter of water. Store-bought electrolyte drinks work too.
Sip fluids steadily throughout the day rather than gulping large amounts at once, which can trigger more cramping. Coconut water, diluted fruit juice, and broth all contribute electrolytes. Watch for signs that dehydration is getting ahead of you: dark-colored urine, a dry mouth, dizziness when standing up, or a rapid heartbeat. Confusion or extreme lethargy signals severe dehydration that needs medical attention.
Foods and Drinks to Avoid
Some foods actively make diarrhea worse. High-fat and greasy meals trigger a stronger gastrocolic reflex, meaning your digestive system responds with more powerful contractions. This is because fatty foods cause your body to release more digestive hormones, bile, and enzymes, all of which speed things along when your gut is already irritated. Skip fried food, fast food, rich sauces, and fatty cuts of meat until you’ve recovered.
Spicy foods have the same effect, stimulating greater contractions in both the small intestine and colon.
Sugar alcohols are a hidden culprit that people often overlook. Sorbitol, mannitol, xylitol, and maltitol have known laxative properties. They’re poorly absorbed in the small intestine, which draws extra water into the bowel. Even 5 to 20 grams per day can cause gas, bloating, and urgency, and doses above 20 grams can directly cause diarrhea. You’ll find sugar alcohols in sugar-free gum, mints, sugar-free candy, protein bars, and “diet” or “no sugar added” products. Sorbitol also occurs naturally in certain fruits: apples, pears, peaches, plums, prunes, apricots, and dried fruits like dates and raisins. While cooked apples and applesauce in small amounts are generally tolerated, eating large quantities of these fruits raw could make things worse.
Caffeine and alcohol both stimulate the gut and promote fluid loss, so avoid coffee, energy drinks, and alcoholic beverages until you’re better.
Why Dairy Can Be a Problem
Diarrhea, especially from a stomach bug or food poisoning, can temporarily damage the lining of your small intestine where lactase (the enzyme that breaks down milk sugar) is produced. This creates a short-term lactose intolerance even if you normally handle dairy fine. When undigested lactose sits in your gut, it pulls water into the intestine through osmotic effects, which worsens the diarrhea.
Plain yogurt is sometimes an exception because the bacterial cultures have already partially broken down the lactose. But milk, ice cream, soft cheeses, and cream-based foods are best avoided for a few days after symptoms start. Your lactase production typically bounces back on its own as your intestinal lining heals.
What About Probiotics?
Probiotic supplements and foods like yogurt or kefir are frequently recommended for diarrhea, but the evidence is weaker than most people assume. A large Cochrane review of clinical trials found that probiotics probably make little or no difference in whether diarrhea lasts beyond 48 hours. When researchers looked only at the highest-quality studies with low risk of bias, there was no detectable difference between probiotic and control groups.
Some medical guidelines still recommend specific strains for children with infectious diarrhea, but even those recommendations are based on low-quality evidence. Probiotics are unlikely to cause harm, so eating yogurt or taking a supplement won’t hurt. Just don’t count on them as a primary strategy.
A Simple Meal Plan to Start With
- Breakfast: Plain oatmeal made with water, a banana, and small sips of an electrolyte drink
- Lunch: White rice with plain baked chicken and cooked carrots, broth on the side
- Snack: Applesauce, plain crackers, or toast
- Dinner: Broth-based soup with potatoes, chicken, and soft vegetables
Eat smaller portions more frequently rather than three big meals. As your symptoms improve over a day or two, gradually add back your normal foods. Start with simple cooked vegetables, lean proteins, and well-cooked grains before reintroducing raw salads, high-fiber legumes, dairy, or rich foods.