When you have watery diarrhea, the best foods are bland, low-fiber, and easy to digest: white rice, bananas, plain toast, cooked potatoes without skin, broth-based soups, and lean proteins like skinless chicken. These foods won’t irritate your gut further, and some actively help firm up loose stools. Just as important as what you eat is what you avoid and how you stay hydrated, since watery diarrhea pulls fluid and electrolytes out of your body fast.
Start With Fluids, Not Food
Replacing lost fluid is the single most important thing you can do. Watery diarrhea can drain electrolytes like sodium and potassium quickly, and dehydration is the main reason diarrhea becomes dangerous. Sip water, clear broth, or an oral rehydration solution (sold at most pharmacies) throughout the day. Sports drinks work in a pinch but contain more sugar than ideal. If plain water is all you can keep down, that’s fine to start.
Signs you’re getting dehydrated include dark urine, dry mouth, dizziness, extreme thirst, and urinating much less than usual. In infants, watch for no wet diapers for three or more hours, no tears when crying, or a sunken soft spot on the skull.
The Best Foods During Watery Diarrhea
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s a reasonable starting point for the first day or two, but Harvard Health notes there’s no research comparing it to other options, and sticking to only those four foods for more than a couple of days leaves you short on nutrition. Think of BRAT as a launching pad, not a meal plan.
Once your stomach can tolerate it, expand to include other gentle foods:
- White rice and plain pasta. Low in fiber and easy to digest. Avoid brown rice or whole-grain pasta for now.
- Bananas. A good source of potassium, which you’re losing with each watery stool.
- Cooked carrots, butternut squash, or sweet potatoes without skin. Soft, nutrient-dense, and unlikely to irritate your gut.
- Skinless chicken or turkey, and fish. Lean protein helps maintain energy without adding fat that can worsen loose stools.
- Eggs. Scrambled or boiled, eggs are bland and protein-rich.
- Broth-based soups. These do double duty: replacing fluid and providing some calories and salt.
- Avocado. Mild, calorie-dense, and easy on the stomach.
- Plain crackers or white bread toast. Simple starches that absorb stomach acid.
The overall goal is to keep eating. The WHO emphasizes that continuing to eat nutrient-rich foods during a diarrheal episode prevents the cycle where illness leads to poor nutrition, which then makes recovery slower. You don’t need to force large meals, but small, frequent portions are better than fasting.
How Soluble Fiber Helps Firm Stools
Not all fiber is equal when you have diarrhea. Insoluble fiber (found in raw vegetables, whole grains, and bran) speeds things through your gut and can make watery stools worse. Soluble fiber does the opposite: it absorbs water from liquid stool, adding bulk and improving consistency.
Psyllium husk is one of the most studied sources. Research shows it improved stool consistency even in people with secretory diarrhea (the type where the gut actively pumps water into the intestine). Soy fiber shortened the duration of both acute watery diarrhea in children and antibiotic-related diarrhea. Oatmeal, peeled apples, and bananas are food-based sources of soluble fiber you can work into meals easily. Start with small amounts and increase as your gut tolerates it.
Foods and Drinks to Avoid
Some foods pull extra water into the intestine through osmotic pressure, making watery diarrhea worse. Others irritate an already inflamed gut lining. Skip these until you’ve been symptom-free for at least a day or two:
- Dairy products. An intestinal infection can temporarily damage the cells that produce lactase, the enzyme that breaks down milk sugar. This means you may be temporarily lactose intolerant even if you normally handle dairy fine. The Mayo Clinic notes this “secondary lactose intolerance” resolves as the gut heals, but it can take time. Yogurt with live cultures is generally better tolerated than milk.
- Sugar-free gum and candy. These contain sugar alcohols (sorbitol, mannitol, xylitol) that are poorly absorbed and have a well-documented laxative effect. The effect is dose-dependent and gets worse when different sugar alcohols are consumed together.
- Fruit juice and sugary drinks. High concentrations of fructose draw water into the gut. Apple juice and pear juice are common culprits.
- Caffeine and alcohol. Both stimulate intestinal contractions and increase fluid loss.
- Greasy, fried, or heavily spiced food. Fat slows digestion in a way that can trigger cramping, and spicy food irritates the gut lining.
- Raw vegetables, beans, and cruciferous vegetables. Broccoli, cabbage, cauliflower, and legumes produce gas during digestion and are hard on a compromised gut.
Probiotics During and After Diarrhea
Certain probiotic strains can shorten a bout of diarrhea. The two with the strongest evidence are Lactobacillus rhamnosus GG and Saccharomyces boulardii (a beneficial yeast). A large meta-analysis found probiotics reduced the duration and severity of infectious diarrhea from various causes, including viral stomach bugs and traveler’s diarrhea. They also reduced the incidence of antibiotic-related diarrhea.
You can get these through probiotic supplements or fermented foods like yogurt with live cultures (if you’re tolerating dairy). Look for products that list specific strains on the label. Probiotics aren’t a cure, but they can shave roughly a day off your symptoms in many cases.
Feeding Children With Watery Diarrhea
For breastfed infants, keep breastfeeding. Breast milk provides both hydration and nutrients, and the WHO recommends continuing it throughout any diarrheal episode. For formula-fed babies, continue their usual formula unless a doctor advises otherwise. Oral rehydration solutions are important for infants who are losing a lot of fluid.
For older children, the same general food principles apply: bland starches, lean protein, bananas, and cooked vegetables. Don’t restrict food unnecessarily. Children who eat during diarrheal episodes recover faster than those who fast. Avoid fruit juice, which is a common trigger for osmotic diarrhea in young kids.
Warning Signs That Need Medical Attention
Most watery diarrhea resolves on its own within a few days. But certain symptoms signal something more serious. In adults, contact a doctor if diarrhea lasts more than two days, you have six or more loose stools per day, you develop a high fever, or you notice blood, pus, or black tarry stools. Severe abdominal pain, frequent vomiting, or signs of dehydration (dark urine, dizziness, no urination for hours) also warrant prompt attention.
For children, the threshold is lower: diarrhea lasting more than one day, any fever in infants, refusal to drink, or signs of dehydration like sunken eyes, no tears, or drowsiness. Seek help immediately for any child under 12 months, born prematurely, or with other medical conditions.