When you have diarrhea, the best foods are bland, low-fiber, and easy to digest: white rice, bananas, plain toast, broth-based soups, boiled potatoes, eggs, and applesauce. These foods provide energy without irritating your gut or speeding up digestion. Just as important as what you eat is what you drink, since diarrhea pulls water and electrolytes out of your body faster than most people realize.
Start With Simple Starches and Soft Foods
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It works as a starting point, but there’s no need to limit yourself to just those four foods. A day or two of BRAT is fine, but a slightly wider range of bland foods will give you more protein and nutrients to actually recover. White rice is a standout because a full serving contains less than a gram of fiber, so it firms up stool without adding bulk that your gut has to work through. Mashed potatoes (without butter or cream), plain crackers, and refined hot cereals like Cream of Wheat are similarly gentle.
Once your stomach starts to settle, you can add foods that are still easy to digest but more nutritious: eggs, skinless chicken or turkey, baked white fish, cooked carrots, butternut squash, sweet potatoes without skin, and avocado. These give your body the protein it needs to repair the intestinal lining. Brothy soups are especially helpful because they combine gentle nutrition with fluid replacement. Gelatin, popsicles, and plain crackers can also help if you’re struggling to eat much at all.
Why Hydration Matters More Than Food
Diarrhea drains fluid and essential salts from your body quickly. For most adults, the biggest risk isn’t the diarrhea itself but the dehydration that follows. Dark urine, dry mouth, dizziness, and excessive thirst are signs you’re falling behind on fluids.
Water alone isn’t enough. Your intestines absorb fluid most efficiently when sodium and glucose are present in roughly equal amounts. This is the principle behind oral rehydration solutions you can buy at pharmacies. You can also approximate it at home by sipping diluted fruit juice with a pinch of salt, or alternating water with broth. Weak tea is another option. The goal is steady, small sips rather than gulping large amounts, which can trigger more cramping.
Soluble Fiber Can Help Firm Things Up
Not all fiber makes diarrhea worse. Soluble fiber, the kind that dissolves in water and forms a gel, actually helps normalize loose stool. It absorbs excess water in the intestine and resists being broken down as it passes through, so it holds its gel structure and adds body to watery stool. Bananas and applesauce both contain soluble fiber, which is one reason they show up in every diarrhea food list.
Psyllium husk is another well-studied source. Derived from the outer coating of Plantago ovata seeds, it forms a thick gel that helps stool retain shape in the colon. If your diarrhea is lingering, adding a small amount of psyllium to water or food can help. Oatmeal is another gentle source of soluble fiber that most people tolerate well during a bout of diarrhea.
Foods That Will Make It Worse
Some foods actively pull water into the intestine or speed up gut motility, which is exactly what you don’t want. Avoid these until you’ve fully recovered:
- Caffeine speeds up the digestive system. This includes coffee, tea (strong-brewed), chocolate, and most sodas.
- Fried and fatty foods are poorly absorbed when your gut is inflamed. Undigested fat reaches the colon and triggers it to secrete more fluid, worsening diarrhea.
- Dairy products contain lactose, a milk sugar that many people struggle to digest even under normal conditions. During a bout of diarrhea, temporary lactose intolerance is common because the enzyme that breaks it down gets depleted.
- High-sugar foods and drinks pull water and electrolytes into the bowel. Full-strength fruit juice, candy, and sweetened sodas can all make things worse. People who consume more than 40 to 80 grams of fructose per day are especially likely to develop diarrhea from sugar alone.
- Sugar-free gum and candy containing sorbitol, mannitol, or xylitol are notorious triggers. These sugar alcohols are poorly absorbed and ferment in the gut.
- Spicy foods can cause burning and irritation in the rectum and should be avoided until symptoms resolve.
- Gas-producing vegetables like onions, garlic, beans, lentils, and cruciferous vegetables (broccoli, cabbage) belong to a group of poorly digested sugars that ferment in the colon and worsen bloating and loose stool.
Probiotics May Shorten Recovery
Certain probiotic strains can help restore the balance of bacteria in your gut, particularly if your diarrhea was triggered by antibiotics. The strains with the most consistent evidence are Lactobacillus rhamnosus GG and Saccharomyces boulardii (a yeast related to brewer’s yeast). Effective doses in studies ranged from 5 to 40 billion colony-forming units per day. You can find these in supplement form or in some fermented foods, though supplements give you a more reliable dose. Probiotics aren’t a cure, but they can reduce how long a bout lasts.
Transitioning Back to Normal Eating
There’s no fixed timeline for returning to your regular diet. The general principle is to let your symptoms guide you. Start with the bland foods described above for the first day or two. As your stool begins to firm up and cramping fades, gradually reintroduce more variety: cooked vegetables, lean proteins, and eventually raw fruits and salads. Dairy is usually the last thing to bring back, since the gut’s ability to process lactose can take several days to fully return after an illness.
If diarrhea continues for more than two days without any improvement, or if you notice blood or black color in your stool, a fever above 102°F, severe abdominal pain, or signs of dehydration like sunken eyes and skin that doesn’t spring back when pinched, those are signals that something beyond diet needs attention. For children, the window is shorter: seek help if diarrhea doesn’t improve within 24 hours, or if a child hasn’t had a wet diaper in three or more hours.