Most cases of acute diarrhea resolve on their own within one to two days, and the right combination of fluids, food choices, and a few targeted remedies can speed that process along. The priority is replacing lost fluids, giving your gut easy-to-digest fuel, and avoiding the specific foods and drinks that make things worse.
Fluid Replacement Comes First
Diarrhea pulls water and electrolytes out of your body fast. Replacing them is more important than stopping the diarrhea itself, because dehydration is what actually makes you feel terrible and can become dangerous. Plain water helps, but it doesn’t replace the sodium and potassium you’re losing. Broth-based soups are one of the most effective options because they deliver salt, water, and a small amount of calories all at once. Coconut water, diluted fruit juice, and oral rehydration solutions (packets available at most pharmacies) also work well.
Aim for small, frequent sips rather than gulping large amounts, which can trigger nausea or send fluid through your system too quickly. If your urine is dark yellow or you feel dizzy when standing, you need to increase your intake.
What to Eat (and When)
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s fine for the first day or two, but Harvard Health notes there’s no reason to restrict yourself to just those four foods. Brothy soups, oatmeal, boiled potatoes, crackers, and unsweetened dry cereal are equally easy to digest. The real principle is eating bland, low-fat, low-fiber foods that won’t irritate your gut further.
Once things start to settle, usually within a day or two, you can begin adding more nutritious options: cooked squash, carrots, skinless chicken or turkey, fish, eggs, and avocado. These foods provide the protein and nutrients your body needs to recover, which a plain BRAT diet lacks. The key is transitioning gradually. Don’t jump straight from toast to a full meal.
Soluble Fiber Helps Firm Things Up
Not all fiber is the same. Soluble fiber, found in oat bran, barley, lentils, peas, nuts, and certain fruits, absorbs water in the digestive tract and turns into a gel-like substance. This slows digestion and adds bulk to loose stool, which is exactly what you want. Bananas and applesauce work partly because they’re rich in pectin, a type of soluble fiber.
Insoluble fiber, on the other hand, speeds things up and can make diarrhea worse. Raw vegetables, whole wheat bran, and the skins of fruits and potatoes are high in insoluble fiber. During an active bout, peel your fruits and cook your vegetables to reduce the insoluble fiber content while keeping some of the soluble benefit.
Foods and Drinks That Make It Worse
Certain foods act as osmotic triggers, meaning they pull extra water into your intestines and loosen stool further. Sugar alcohols are among the worst offenders. Sorbitol, commonly used in sugar-free gum, mints, and dietetic candies, acts as an osmotic laxative. As little as 10 grams can cause bloating and gas, and 20 grams reliably triggers cramping and diarrhea in most people. A single sugar-free candy can contain around 3 grams of sorbitol, so a handful adds up fast. Check labels for sorbitol, mannitol, and xylitol.
Other things to avoid while your gut is recovering:
- Caffeine and alcohol: both stimulate intestinal contractions and increase fluid loss.
- Dairy products: lactose can be harder to digest during a diarrheal illness, even if you’re not normally lactose intolerant, because the enzyme that breaks it down gets temporarily depleted.
- Fatty and fried foods: fat slows stomach emptying but can speed up movement through the intestines, worsening loose stools.
- High-fructose foods: fruit juices, honey, and sodas sweetened with high-fructose corn syrup can have the same osmotic effect as sugar alcohols when consumed in large amounts.
Probiotics for Gut Recovery
Probiotics introduce beneficial bacteria that compete with whatever is disrupting your gut. Two of the most studied strains for diarrhea are Saccharomyces boulardii (a beneficial yeast) and Lactobacillus rhamnosus GG. Both are available over the counter in capsule or powder form. S. boulardii is particularly useful because, as a yeast rather than a bacterium, it isn’t killed by antibiotics, making it a good option if your diarrhea is antibiotic-related.
Fermented foods like plain yogurt (if you can tolerate dairy), kefir, sauerkraut, and miso also deliver live cultures, though in lower and more variable concentrations than a targeted supplement. If you go the supplement route, look for products that list specific strain names on the label, not just genus and species.
Ginger and Other Herbal Options
Ginger has a long folk reputation for settling the stomach, and lab research supports a specific mechanism: an active compound in ginger called zingerone blocks certain bacterial toxins from binding to receptors in the intestinal lining, which reduces the fluid accumulation that causes watery stool. Fresh ginger tea (sliced ginger steeped in hot water for 10 minutes) is the simplest way to get it. Ginger chews and capsules also work, though avoid ginger ale, which is mostly sugar and carbonation with minimal actual ginger.
Tannins, the astringent compounds found in black tea, blackberry leaves, and raspberry leaves, can also help. Tannins tighten the mucous membrane tissue lining your intestinal tract, reducing the amount of fluid that seeps into the bowel. A strong cup of plain black tea or a tea made from dried blackberry leaves is a traditional remedy with a solid biological basis. Let it steep long enough (five minutes or more) to extract a meaningful amount of tannin.
Zinc for Children With Diarrhea
The World Health Organization recommends zinc supplementation specifically for children with diarrhea: 20 mg per day for 10 to 14 days, or 10 mg per day for infants under six months. Zinc supports immune function and helps repair the intestinal lining. This recommendation is primarily aimed at children in settings where zinc deficiency is common, but it highlights how important this mineral is for gut recovery. For adults, ensuring adequate zinc intake through foods like pumpkin seeds, chickpeas, and cashews can support recovery without supplementation.
Recognizing When It’s More Serious
Most diarrhea passes within a day or two. But certain signs mean your body needs more help than home remedies can provide. For adults, the Mayo Clinic identifies these red flags: diarrhea lasting more than two days without improvement, signs of dehydration (excessive thirst, dry mouth, very dark urine, dizziness, or little to no urination), severe abdominal or rectal pain, bloody or black stools, or a fever above 102°F (39°C).
Children need closer monitoring. A child’s diarrhea that doesn’t improve within 24 hours, a fever above 102°F, no wet diaper for three or more hours, bloody stools, or unusual drowsiness all warrant prompt medical attention. Dehydration develops faster in small bodies, so the threshold for concern is lower and the timeline is shorter. Skin that doesn’t flatten quickly after being pinched, or a sunken appearance around the eyes or cheeks, are physical signs that dehydration has already progressed significantly.