When you have diarrhea, the best foods are bland, low-fat, and easy to digest: think bananas, white rice, plain toast, cooked carrots, applesauce, and simple proteins like chicken or turkey. These foods provide calories and nutrients without further irritating your gut, and some actively help firm up loose stool. Equally important is knowing what to avoid, since certain common foods and ingredients can make diarrhea worse.
Why the BRAT Diet Is Outdated
You’ve probably heard of the BRAT diet (bananas, rice, applesauce, toast). It was a standard recommendation for decades, but most clinicians no longer endorse it because it’s too restrictive. Eating only four foods leaves you short on protein, fat, and several vitamins right when your body needs energy to recover. The individual BRAT foods are still fine choices. The problem was treating them as the only options.
Current guidance favors getting back to a broader range of bland, low-fat foods within a day or two. On the first day, focus on clear liquids: water, broth, diluted juice, or an oral rehydration solution. By day two, start adding small meals every few hours, including items like cooked cereals, yogurt, crackers, jelly on toast, and lean poultry. By day three, most people can return to a normal diet if symptoms are improving.
Best Foods for Firming Up Stool
Not all fiber makes diarrhea worse. Soluble fiber, the type that dissolves into a gel in your gut, actually helps normalize loose stool by absorbing excess water in the colon. Foods rich in soluble fiber act like a sponge, giving watery stool more structure. Insoluble fiber (the rough, scratchy kind in raw vegetables and bran) does the opposite, speeding things through your digestive tract, so you want to avoid that during a bout of diarrhea.
Good sources of soluble fiber that are gentle on an upset stomach include:
- Bananas (ripe, not green), which are also high in potassium
- Applesauce, rich in pectin, a soluble fiber especially abundant in fruit
- White rice, low in insoluble fiber and easy to digest
- Oatmeal or cream of wheat, cooked soft
- Cooked, peeled carrots or potatoes (without butter or heavy seasoning)
Pectin deserves special attention. It’s a gel-forming soluble fiber found in high concentrations in berries, pears, and cooked apples. During recovery, applesauce is the easiest way to get pectin without the raw fiber of a whole apple. Canned or cooked pears work well too.
Replacing Lost Electrolytes Through Food
Diarrhea drains potassium, sodium, and water from your body faster than you’d expect. Low potassium in particular can leave you feeling weak and fatigued even after the diarrhea itself stops. You can rebuild potassium levels through food rather than relying solely on sports drinks.
Ripe bananas are the classic choice, but other potassium-rich foods that are easy on the stomach include potatoes (baked or boiled, without heavy toppings), fish, lean meat, and apricot or peach nectar. Broth-based soups pull double duty by replacing both sodium and fluid. Sip liquids steadily throughout the day rather than drinking large amounts at once, which can trigger more cramping.
Foods and Ingredients to Avoid
Some foods actively make diarrhea worse through specific mechanisms, not just because they’re “heavy.” Knowing the culprits helps you avoid accidentally prolonging your symptoms.
Dairy products. During a gut infection or inflammation, your intestinal lining can temporarily lose its ability to produce lactase, the enzyme that breaks down milk sugar. Without enough lactase, undigested lactose passes into your colon where bacteria ferment it, producing gas, bloating, and more diarrhea. This temporary lactose intolerance can persist for days to weeks after the initial illness resolves. Yogurt is an exception for many people because the bacterial cultures partially pre-digest the lactose.
Sugar-free gum, candy, and medications. These commonly contain sugar alcohols like sorbitol, mannitol, and xylitol, which act as osmotic laxatives. They pull water into your intestines because your body can’t fully absorb them. Even small amounts can worsen diarrhea, so check ingredient labels on anything sugar-free while you’re recovering.
Greasy, fried, or high-fat foods. Fat slows stomach emptying but speeds up contractions in the colon, which is the opposite of what you want. Skip fast food, butter-heavy dishes, and rich sauces until you’re fully recovered.
Caffeine and alcohol. Both stimulate the gut and promote fluid loss. Coffee in particular increases colonic motility. Alcohol irritates the intestinal lining directly.
High-fructose foods and drinks. Fruit juice, soda, and honey contain concentrated fructose, which is poorly absorbed by many people even when healthy. During diarrhea, your gut’s absorptive capacity is already reduced, making fructose even more likely to draw water into the intestine and worsen symptoms.
Whether Probiotics Help
There is real evidence behind one specific probiotic for acute diarrhea. A strain of yeast called Saccharomyces boulardii, available over the counter in most pharmacies, has been shown in multiple trials to reduce the duration of diarrhea by roughly a day and a half. It works differently from bacterial probiotics because, as a yeast, it isn’t killed by antibiotics, making it useful for antibiotic-associated diarrhea as well.
Yogurt with live cultures can also help, both as a gentle food and as a mild probiotic source. If you tolerate yogurt without increased symptoms, it’s one of the better early foods to reintroduce because it provides protein, calories, and beneficial bacteria simultaneously.
Signs You’re Getting Dehydrated
The biggest risk from diarrhea isn’t the diarrhea itself but the fluid and electrolyte loss that comes with it. In adults, early dehydration shows up as increased thirst, darker urine, dry mouth, and fatigue. If you notice you’re urinating much less than normal or your urine is deep amber, you need to increase fluid intake aggressively.
In young children, mild dehydration may only show up as increased thirst and slightly reduced urine output, with no other obvious signs. This makes it easy to underestimate. Weigh a child if possible: a loss of even 5% of body weight (half a kilogram in a 10 kg toddler) indicates significant dehydration. For both adults and children, signs like sunken eyes, no tears when crying, or inability to keep fluids down warrant prompt medical attention.
A Simple Recovery Meal Plan
Putting this together into a practical day of eating during recovery:
- Breakfast: Cream of wheat or oatmeal made with water, a ripe banana, and small sips of diluted apple juice or herbal tea
- Mid-morning: A few saltine crackers with a cup of clear broth
- Lunch: Plain white rice with baked chicken breast, cooked carrots on the side
- Afternoon: Applesauce or plain yogurt (if tolerated)
- Dinner: Baked potato with a small portion of fish, toast with a thin layer of jelly
Keep portions small. Eating six small meals is easier on your gut than three large ones. Stay with this pattern for two to three days, then gradually reintroduce your normal diet as your stool returns to its usual consistency. Add back one potentially irritating food at a time (dairy, raw vegetables, coffee) so you can identify anything that triggers a setback.