After a stomach bug, your gut needs easy-to-digest foods that replace lost fluids and nutrients without triggering more nausea or diarrhea. The old advice to stick strictly to bananas, rice, applesauce, and toast (the BRAT diet) is outdated. The CDC notes that this approach is “unnecessarily restrictive” and provides suboptimal nutrition for a recovering gut. The better strategy: start with bland, gentle foods and return to a normal diet faster than you might expect.
Hydration Comes First
Before worrying about food, focus on replacing the fluids you’ve lost. Vomiting and diarrhea drain water and electrolytes quickly, and dehydration is the most dangerous part of any stomach bug. Sip small amounts frequently rather than gulping large quantities, which can trigger more vomiting. Water is fine, but drinks with electrolytes (sodium and potassium especially) are better. Broth, diluted sports drinks, and oral rehydration solutions all work well.
Avoid fruit juice, regular soda, and other high-sugar drinks. Fructose and other sugars stimulate your intestines to release more water, which loosens stools and can make diarrhea worse. Apple juice is one of the biggest offenders despite its reputation as a sick-day staple.
Best Foods for the First 24 to 48 Hours
Once you can keep liquids down, start introducing solid food. You don’t need to wait until symptoms fully stop. Foods high in soluble fiber are particularly helpful because this type of fiber absorbs excess fluid in your intestines and helps firm up loose stools. Good options include:
- Ripe bananas, which are rich in potassium and soluble fiber
- White rice or oatmeal, both gentle and binding
- Boiled or baked potatoes (without butter or heavy toppings)
- Applesauce (unsweetened, since added sugar can worsen diarrhea)
- Plain toast or crackers made with white flour
- Canned fruit in water or light syrup
Plain chicken breast, eggs, and simple soups with broth and vegetables are also well tolerated and provide protein your body needs to repair damaged intestinal lining. The goal is calories and nutrients without excess fat, fiber from raw vegetables, or heavy seasoning.
Why You Should Skip Dairy for a While
Your small intestine produces an enzyme that breaks down the sugar in milk and dairy products. After a stomach bug, the cells that make this enzyme are often damaged by the infection. That means your body temporarily can’t digest dairy well, even if you normally have no issues with it. Undigested milk sugar pulls water into your intestines and gets fermented by gut bacteria, causing bloating, cramps, and more diarrhea.
This temporary sensitivity typically lasts a few days to a few weeks, depending on how much damage the virus caused. Start reintroducing dairy gradually once your stools return to normal. Yogurt is usually tolerated earlier than milk because the bacterial cultures have already partially broken down the lactose.
Ginger for Lingering Nausea
If nausea hangs on after the worst of the bug has passed, ginger is one of the few home remedies with solid clinical backing. The active compounds in ginger speed up gastric emptying, meaning food moves through your stomach faster instead of sitting there triggering that queasy feeling. Research on nausea from other causes has found that around 1 gram of ginger per day (roughly half a teaspoon of ground ginger) taken for several days can reduce vomiting episodes significantly. Ginger tea, ginger chews, or small amounts of fresh ginger grated into hot water are all practical ways to get this amount.
Returning to a Normal Diet
The outdated approach was to keep eating bland food for days. Current guidelines recommend returning to your regular diet as quickly as you can tolerate it. “Gut rest” is not helpful. Your intestinal lining actually recovers faster when it has a variety of nutrients to work with, including protein and healthy fats. Most people can return to eating normally within two to three days of their symptoms starting to improve.
That said, a few categories of food are worth avoiding for the first several days beyond dairy. Greasy, fried, or very spicy foods can irritate an already inflamed gut. Caffeine and alcohol are both dehydrating and can stimulate your intestines. Raw vegetables and high-fiber whole grains, while normally healthy, can be hard to digest when your gut lining is still healing. Reintroduce these gradually over three to five days.
Probiotics Can Shorten Recovery
Your gut’s population of beneficial bacteria takes a hit during a stomach bug. Probiotics can help restore that balance and may actually shorten the duration of diarrhea. The two best-studied strains for gastroenteritis recovery are Lactobacillus rhamnosus GG (often labeled LGG) and a beneficial yeast called Saccharomyces boulardii. LGG works by producing a protective biofilm on the intestinal lining and supporting the survival of gut cells. Saccharomyces boulardii interferes with pathogen attachment and stimulates the production of compounds that help restore normal intestinal function.
Multi-strain probiotics have also shown benefits. You can find these strains in supplement form at most pharmacies. Yogurt with live cultures provides some probiotics too, though in lower concentrations, and is worth adding once you can tolerate dairy again.
Zinc Supports Gut Repair
The World Health Organization recommends zinc supplementation during and after diarrheal illness in children, where it has been shown to reduce both the duration and severity of symptoms and prevent subsequent episodes. Zinc plays a key role in cellular growth and repair, which matters when your intestinal lining is regenerating. Adults recovering from a stomach bug can benefit from zinc-rich foods like lean meat, pumpkin seeds, chickpeas, and fortified cereals. A short course of a zinc supplement (typically 20 mg per day for 10 to 14 days) is another option, particularly if your diet has been limited during illness.
Signs That Home Recovery Isn’t Enough
Most stomach bugs resolve on their own within one to three days. But dehydration can become dangerous, especially in young children and older adults. Contact a healthcare provider if diarrhea lasts more than 24 hours, if you or your child can’t keep any fluids down, or if you notice blood or black color in the stool. A fever of 102°F or higher, unusual sleepiness, or confusion are also signs that the illness needs medical attention rather than just dietary management.