When you have diarrhea, the best foods are bland, low-fiber, and easy to digest: white rice, bananas, plain toast, boiled potatoes, chicken breast, and broth. These foods give your gut less work to do while you recover, and they’re unlikely to make things worse. What you avoid matters just as much as what you eat, since certain sugars, fatty foods, and high-fiber choices can actively pull more water into your intestines and keep symptoms going.
Best Foods During the Acute Phase
Your goal in the first day or two is to eat foods that are gentle on your digestive system while still giving your body fuel. Look for foods with no more than 1 to 2 grams of fiber per serving. White rice, plain white bread or toast, saltine crackers, and simple noodles are all good staples. Bananas are especially useful because they contain pectin, a type of soluble fiber found naturally in fruit that forms a gel in your gut, helping absorb excess water and firm up stool.
Lean proteins like skinless chicken, turkey, eggs, and mild white fish are well tolerated. Prepare them simply: boiled, steamed, baked, or poached. Avoid frying or adding rich sauces. Broth-based soups do double duty by providing both nutrition and fluid, which matters a lot when you’re losing water quickly. Applesauce (unsweetened) and well-cooked, peeled vegetables like carrots or potatoes round out the list.
You may have heard of the BRAT diet (bananas, rice, applesauce, toast). It’s a fine starting point, but it’s too limited to follow for more than a day. It doesn’t provide enough protein, fat, or calories to support recovery. The World Health Organization emphasizes continued feeding during diarrhea episodes because restricting food too aggressively can slow healing and deplete your body further. Eat small, frequent meals rather than forcing large ones.
What to Avoid and Why
Some foods and drinks worsen diarrhea through a specific mechanism: they draw extra water into your intestines. This is called osmotic diarrhea, and it’s triggered by substances your gut can’t fully absorb.
Sugar alcohols are the biggest offenders. Sorbitol, found in sugar-free gum, diet candies, and many “no sugar added” products, acts as an osmotic laxative. As little as 10 grams of sorbitol causes bloating and gas in most people, and 20 grams reliably triggers cramping and diarrhea. A single piece of sugar-free candy can contain about 3 grams, so a handful adds up fast. Mannitol and xylitol work the same way. Check ingredient labels on anything labeled “sugar-free” or “dietetic.”
Other items to skip:
- High-fructose foods and drinks. Fruit juice, soda, honey, and dried fruit can overwhelm your intestine’s ability to absorb fructose, pulling water in.
- Greasy or fried foods. Fat slows digestion unevenly and can trigger more cramping.
- Caffeine and alcohol. Both increase gut motility, speeding things through before your colon can absorb enough water.
- Raw vegetables, whole grains, and seeds. High insoluble fiber adds bulk and stimulates the gut, which is the opposite of what you want right now.
- Spicy foods. Capsaicin irritates the intestinal lining and can accelerate transit time.
Dairy: A Special Case
You may notice that milk, ice cream, or soft cheese makes your symptoms worse during or after a bout of diarrhea, even if dairy never bothered you before. This is common. Infections that cause diarrhea can temporarily damage the lining of your small intestine, reducing your ability to digest lactose (the sugar in milk). This secondary lactose intolerance typically resolves within three to four weeks as the intestinal lining heals.
If dairy seems to worsen your symptoms, cut it out for two weeks and then try small amounts again. Yogurt is often tolerated better than milk because the bacterial cultures partially break down lactose during fermentation. Hard cheeses like cheddar also contain very little lactose. You don’t need to avoid dairy permanently; just give your gut time to rebuild.
Staying Hydrated Matters More Than Food
Dehydration is the real danger with diarrhea, not the diarrhea itself. Every loose stool pulls water and electrolytes out of your body, and replacing them is the single most important thing you can do. Water alone isn’t enough because you’re also losing sodium, potassium, and chloride.
An oral rehydration solution is ideal. You can buy packets at any pharmacy, or make a simple version at home: mix six teaspoons of sugar and half a teaspoon of salt into one liter of clean water. The sugar isn’t for taste; it activates a transport system in your gut that pulls sodium and water back into your body. Sip steadily throughout the day rather than gulping large amounts at once.
Signs that dehydration is becoming serious include a dry mouth, sunken-looking eyes, dark yellow urine, dizziness when standing, and a rapid or weak pulse. In adults, losing even a few percent of body weight in fluid can affect how you think and feel. If you can’t keep fluids down, or if diarrhea persists beyond two to three days with blood or high fever, that signals something beyond what diet alone can manage.
Probiotics Can Shorten Recovery
Certain probiotic strains help your gut fight back during acute diarrhea. A large Cochrane review of 23 studies found that probiotics reduced the duration of diarrhea by roughly 30 hours on average. One well-studied yeast strain shortened diarrhea by about a full day compared to no treatment. Another strain, commonly found in commercial probiotic supplements and some yogurts, performed even better in head-to-head comparisons.
Not all probiotics are equal for diarrhea. Look for products that specify their strains on the label rather than just listing general species names. Fermented foods like plain yogurt and kefir provide some benefit, but concentrated supplement forms deliver higher amounts. Start probiotics as early in the illness as possible for the most benefit.
How to Reintroduce Normal Foods
Once your stools start firming up, usually after one to three days, you can begin adding back more variety. Do this gradually over three to five days rather than jumping straight to your normal diet. A reasonable progression looks like this: start with the bland foods described above, then add well-cooked vegetables and soft fruits. Next, bring back lean meats in larger portions and lightly seasoned dishes. Finally, reintroduce whole grains, raw vegetables, and higher-fat foods.
Pay attention to how your gut responds at each stage. If a particular food triggers loose stools again, pull it back out and try again in another day or two. Your intestinal lining needs time to regenerate its normal absorptive surface, and pushing too fast just restarts the cycle. Dairy, raw salads, and high-fiber cereals are the most common triggers for setbacks during recovery, so save those for last.