When you have diarrhea, the best foods are bland, easy to digest, and rich in soluble fiber or starch that helps firm up your stool. Bananas, white rice, oatmeal, boiled potatoes, and brothy soups are all solid starting points. But you don’t need to limit yourself to a handful of “safe” foods. A broader range of gentle, nutritious options will actually help you recover faster than a highly restrictive diet.
The BRAT Diet Is a Start, Not a Plan
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s been the go-to recommendation for decades, and those four foods are fine for the first day or two. But there are no studies comparing the BRAT diet with other approaches, and most experts now say there’s no reason to restrict yourself to just those items. They’re low in protein, fat, and several vitamins your body needs to heal.
A better approach is to use BRAT foods as a foundation and add other gentle options as soon as you feel ready. Crackers, unsweetened dry cereal, cooked carrots, sweet potatoes without the skin, avocado, skinless chicken or turkey, fish, and eggs are all bland enough to tolerate while providing the protein and nutrients that speed recovery.
Foods That Help Firm Up Stool
Soluble fiber is your best friend during a bout of diarrhea. It dissolves in water and forms a gel-like material in your stomach, slowing digestion and absorbing excess fluid in the intestines. That extra bulk helps transform loose, watery stool into something more solid. Good sources of soluble fiber include oats, bananas, applesauce, cooked carrots, avocados, and barley.
Green (unripe) bananas deserve special mention. They contain a type of starch that resists digestion in the small intestine and travels to the colon, where it absorbs water and supports recovery. Clinical trials in children with persistent diarrhea found that green banana significantly reduced the duration of symptoms, the amount of stool, and even the need for rehydration fluids. Ripe bananas are helpful too, but if you can find slightly green ones, they offer an extra advantage.
Cooked and cooled white rice works on a similar principle. Cooling rice after cooking converts some of its starch into a resistant form that absorbs water in the colon. It’s a simple trick that makes plain rice even more effective.
Replacing Lost Electrolytes Through Food
Diarrhea flushes potassium and sodium out of your body quickly. Low potassium leaves you feeling weak and fatigued, sometimes with muscle cramps. Drinking water alone won’t replace what you’ve lost.
Ripe bananas are one of the easiest potassium-rich foods to keep down. Boiled or baked potatoes (without heavy toppings), fish, and lean meat are also high in potassium. Brothy soups pull double duty by providing both sodium and fluid. Apricot or peach nectar can help too, though avoid versions with added high-fructose corn syrup, which can make diarrhea worse.
Lean Protein Without the Grease
Your body needs protein to repair the intestinal lining, but the type of protein matters. Boiled or baked chicken without the skin, turkey, and scrambled eggs are light enough to tolerate while still delivering what your gut needs to heal. Fish is another good option, especially white fish like cod or tilapia.
Fatty and greasy meats do the opposite. Fried foods, bacon, sausage, and heavily seasoned dishes stimulate intestinal contractions, essentially pushing food through your system faster and making diarrhea worse. Save those for after you’ve fully recovered.
Why Dairy Can Be a Problem
Many people find that milk, ice cream, and soft cheeses make diarrhea worse, even if they normally digest dairy without trouble. There’s a biological reason for this. The enzyme that breaks down lactose (the sugar in milk) sits on the very tips of tiny finger-like projections lining your small intestine. During a stomach bug or food poisoning, those projections get damaged, and the cells that replace them are often too immature to produce enough of the enzyme. The result is a temporary inability to digest lactose, which pulls water into your intestines and extends diarrhea.
This secondary lactose intolerance typically resolves on its own within two to four weeks as the intestinal lining regenerates. In the meantime, yogurt is usually better tolerated than milk because the fermentation process breaks down some of the lactose. Hard cheeses like cheddar contain very little lactose and are generally safe.
Foods and Drinks to Avoid
Some foods actively pull water into your intestines through an osmotic effect, making loose stools even looser. The biggest culprits:
- Sugar-free gum and candy. Sorbitol, mannitol, and other sugar alcohols are poorly absorbed and draw water into the colon. Even small amounts can trigger diarrhea in sensitive people.
- Fruit juice and soda with high-fructose corn syrup. The human intestine has a limited capacity to absorb fructose. When intake exceeds what your gut can handle, the unabsorbed sugar creates an osmotic load that passes into the colon, where bacteria ferment it and produce gas, bloating, and more diarrhea.
- Coffee and alcohol. Both stimulate gut motility, speeding up transit time and reducing the amount of water your colon can reabsorb.
- Raw vegetables and high-fiber whole grains. Insoluble fiber (the kind in bran, raw salads, and the skins of fruits and vegetables) speeds transit through the intestines. Save these for after recovery.
- Spicy foods. Capsaicin and other compounds in spicy dishes can irritate the intestinal lining and trigger contractions.
Do Probiotics Help?
Certain probiotics can shorten a bout of acute diarrhea, though not all strains are equally useful. The best-studied options are a specific strain of bacteria found in some yogurts and supplements (Lactobacillus rhamnosus GG) and a beneficial yeast (Saccharomyces boulardii). Clinical trials involving thousands of participants found that both reduced the duration of diarrhea and the frequency of stools when taken at adequate doses for five to ten days. In 2023, a European pediatric gastroenterology society formally recommended both for acute stomach bugs in children.
For food-based sources, yogurt with live active cultures is the most practical option. Look for labels that list specific strains rather than just “live cultures.” Other fermented foods like kimchi, sauerkraut, miso, and kombucha contain live microorganisms, but they haven’t been proven to contain the specific strains shown to help with diarrhea. They’re not harmful, but yogurt is the stronger bet during active symptoms.
When to Start Eating Normally Again
Most experts don’t recommend fasting or following a restricted diet any longer than necessary. Once you feel like eating, you can generally return to your normal diet. There’s no required sequence or multi-day reintroduction schedule for most people with a standard case of acute diarrhea.
The practical reality is that your appetite will guide you. Start with the bland, easy-to-digest foods above, and as your stools begin to normalize, gradually add back cooked vegetables, fruits without skins, and eventually raw produce and whole grains. Give dairy a few extra days if you notice it causes bloating or a return of loose stools. Within two to four weeks, your gut lining will have regenerated enough to handle lactose normally again.