You can usually return to your normal diet as soon as you feel hungry again. Most experts don’t recommend fasting or following a restricted diet when you have acute diarrhea, and there’s no set number of hours you need to wait. The real answer depends on how your stomach feels and which foods you reintroduce first.
Your Appetite Is the Best Guide
The National Institute of Diabetes and Digestive and Kidney Diseases puts it simply: when you feel like eating again, you can eat your normal diet. For most people with a stomach bug or food poisoning, that means appetite starts returning within 12 to 48 hours after the worst symptoms pass. Some people bounce back faster, others take a few days. The key signal is genuine hunger rather than just the absence of nausea.
That said, “eating normally” doesn’t mean diving straight into a large, heavy meal. Your gut has been through a lot. The lining of your small intestine may be temporarily irritated, and your digestive system needs a little ramp-up time even if you’re technically ready for solid food.
What to Eat in the First Day or Two
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s fine for a day or two, but Harvard Health Publishing notes there are no studies comparing it to other approaches, and a less restrictive diet actually makes more sense. Those four foods are low in protein and other nutrients your body needs to recover.
A better approach is to start with bland, easy-to-digest foods and expand from there. Good early options include:
- Brothy soups (chicken broth, vegetable broth)
- Oatmeal or unsweetened dry cereal
- Boiled or baked potatoes
- Crackers
- Cooked carrots or squash (butternut, pumpkin)
Once your stomach feels settled with these, you can add more nutrient-dense foods: skinless chicken or turkey, fish, eggs, avocado, and sweet potatoes without the skin. These are still gentle on your gut but give you the protein and calories you need to get your energy back. Most people can work through this progression within one to three days.
Foods That Can Set You Back
Certain foods are more likely to trigger another round of loose stools or cramping, even after you’re feeling better. Greasy, fried, and heavily spiced foods are the biggest culprits because fat slows digestion in ways your recovering gut isn’t ready for, and spices can irritate an already-sensitive intestinal lining.
Very sweet foods and drinks deserve special attention. When highly concentrated sugar hits your intestines, it pulls water into your bowel through osmosis, which is the last thing you need during recovery. This includes fruit juices, sodas, and sports drinks with high sugar content. Sugar-free gums and candies made with sorbitol can be just as problematic, since sorbitol is known to cause gas, bloating, and diarrhea on its own.
Alcohol and caffeine both speed up gut motility and can bring symptoms back. Hold off on coffee and beer for at least a day or two after your last bout of diarrhea.
Why Dairy Can Be a Problem Temporarily
Many people notice that milk, ice cream, or cheese causes bloating or loose stools for several days after a diarrheal illness, even if they normally tolerate dairy just fine. This happens because the infection damages cells along your intestinal lining that produce lactase, the enzyme responsible for breaking down milk sugar. Without enough lactase, undigested lactose passes into your colon, where bacteria ferment it and produce gas, cramps, and more diarrhea.
This temporary lactose intolerance typically resolves on its own as your gut lining heals, usually within one to two weeks. In the meantime, yogurt tends to be better tolerated than milk because the bacterial cultures in yogurt have already partially broken down the lactose. You can reintroduce small amounts of dairy after a few days and see how your body responds.
Probiotics Can Speed Recovery
Probiotics aren’t a magic fix, but they do have solid evidence behind them. A large Cochrane review found that probiotics shortened the average duration of diarrhea by about 30 hours and reduced the risk of diarrhea still being present at the three-day mark by roughly a third. The strain with the strongest track record is Lactobacillus GG, which was particularly effective in children with rotavirus infections, cutting diarrhea duration by about 38 hours compared to a placebo.
One important caveat: probiotics appear to work best for viral diarrhea. Two trials looking specifically at bacterial diarrhea found no benefit from Lactobacillus GG. If your symptoms came from food poisoning caused by bacteria, probiotics are less likely to make a noticeable difference. You can find Lactobacillus GG in certain yogurt brands and supplement capsules sold at most pharmacies.
Hydration Matters More Than Food
While you’re figuring out when to eat, don’t overlook fluids. Diarrhea drains water and electrolytes fast. Sipping water, clear broths, and oral rehydration solutions throughout the day is more important in the first 24 hours than getting solid food in. Small, frequent sips work better than gulping large amounts, which can trigger nausea.
Signs of dehydration include dark urine, dizziness when standing, dry mouth, and feeling unusually tired. In older adults and young children, dehydration can develop quickly and become serious.
When Diarrhea Signals Something More Serious
Most diarrheal episodes resolve within a couple of days. But certain symptoms warrant prompt medical attention: diarrhea lasting more than two days in adults (or more than one day in children), a high fever, six or more loose stools per day, blood or pus in the stool, severe abdominal pain, or signs of dehydration like confusion or extreme fatigue. Pregnant people, adults over 65, anyone on antibiotics, and those with weakened immune systems should be in closer contact with their doctor, since complications are more likely in these groups.
For infants under 12 months, any fever alongside diarrhea or refusal to drink for more than a few hours is a reason to seek care right away.