Most food poisoning resolves on its own within 12 to 48 hours. The key to getting through it faster is managing dehydration, eating strategically as symptoms improve, and knowing which common remedies actually help versus those that can make things worse.
What to Expect and How Long It Lasts
The timeline depends on what made you sick. Norovirus, the most common culprit, kicks in within 12 to 48 hours of eating contaminated food. Salmonella follows a similar window of 6 to 48 hours. E. coli typically takes one to three days to produce symptoms, and Campylobacter can take two to five days. This means the meal you suspect might not actually be the one that got you.
For most healthy adults, the worst passes within two days. Your body is actively purging the infection, which is why diarrhea and vomiting, while miserable, are part of the process. Some infections drag on longer. Campylobacter can produce symptoms for weeks, and certain people can feel unwell for 10 days or more depending on the pathogen and their immune response.
Fluids Come First
Dehydration is the real danger with food poisoning, not the infection itself. When you’re losing fluids from both ends, replacing them is the single most important thing you can do. If you’re actively vomiting, stick to small, frequent sips rather than gulping down a full glass. Good options include water, ice chips, broth, diluted fruit juice, electrolyte drinks, popsicles, and weak decaffeinated tea.
Plain water alone isn’t ideal because you’re also losing electrolytes through vomiting and diarrhea. Electrolyte drinks or broth help replace sodium and potassium, which keep your muscles and organs functioning properly. Take small sips every few minutes rather than waiting until you’re thirsty, since thirst is already a sign you’re behind on fluids.
What to Eat as You Recover
You’ve probably heard of the BRAT diet: bananas, rice, applesauce, and toast. It’s fine for the first day when you’re at your sickest, but it’s no longer recommended as a strict protocol. The American Academy of Pediatrics dropped it because it lacks calcium, vitamin B12, protein, and fiber. Following it for more than 24 hours can actually slow your gut’s recovery.
A better approach is eating as tolerated, starting with small portions of mild foods. Beyond the BRAT staples, your stomach can usually handle brothy soups, dry cereal, oatmeal, boiled potatoes, and saltine crackers. Smaller meals work better than large ones since your digestive system is still irritated.
Once your stomach starts settling, gradually add foods that are still soft but more nutritious: scrambled eggs, skinless chicken or turkey, and cooked vegetables. These give your body the protein and vitamins it needs to actually repair itself. There’s no fixed schedule for this transition. Let your symptoms guide you. If something makes you nauseated, back off and try again in a few hours.
What to Avoid
While your gut is recovering, certain foods and drinks will make things worse. Dairy products, fatty or fried foods, spicy dishes, caffeine, and alcohol all irritate an already inflamed digestive tract. Caffeine and alcohol also worsen dehydration. High-fiber foods like raw vegetables and whole grains can be too much for your gut to process in the first couple of days.
Over-the-Counter Medications: Be Careful
Anti-diarrheal medications are tempting when you can’t leave the bathroom, but they come with a real caveat. These drugs work by slowing your gut, which also slows your body’s ability to flush out the pathogen causing the illness. The FDA specifically warns against using them if you have bloody stools or a high fever, since these signs suggest a more serious bacterial infection where trapping the bacteria inside you can cause harm.
For nausea, over-the-counter options containing bismuth subsalicylate (the active ingredient in Pepto-Bismol) can help settle your stomach. Ginger, whether as tea or chews, is a traditional nausea remedy many people find helpful, though clinical evidence for its effectiveness in food poisoning specifically is limited.
As for probiotics, a large Cochrane review of the available research found no meaningful difference between probiotic and control groups in how long diarrhea lasted or the likelihood of it continuing past 48 hours. Despite their popularity, the evidence doesn’t support taking probiotics to shorten a bout of food poisoning.
Signs That Need Medical Attention
Most food poisoning doesn’t require a doctor. But certain symptoms signal something more serious is going on. Get medical help if you have a fever over 102°F, diarrhea lasting more than three days, blood in your stool, or signs of severe dehydration like very dark urine, dizziness when standing, or an inability to keep any fluids down for more than a few hours. Young children, older adults, pregnant women, and people with weakened immune systems are at higher risk for complications and should have a lower threshold for seeking care.
Speeding Up Your Recovery
Rest matters more than most people give it credit for. Your immune system does its best work when you’re not burning energy on other activities. Sleep as much as your body wants to, especially in the first 24 hours. Beyond rest, your recovery strategy is straightforward: stay hydrated with electrolyte-containing fluids, eat bland foods in small amounts as you can tolerate them, transition back to a normal diet within two to three days, and avoid the temptation to suppress symptoms with medications unless the discomfort is truly unmanageable.
Most people feel significantly better by day two and are back to normal eating within three to five days. If your symptoms are steadily improving, even slowly, that’s a good sign your body is handling the infection on its own.