When your stomach is acting up, the right food choices depend on what’s actually going on. Bloating, diarrhea, acid reflux, and general nausea each respond to different dietary strategies. The common thread: eat smaller meals, favor cooked over raw foods, and temporarily pull back on anything high in fat, fiber, or spice until symptoms settle.
When You’re Acutely Sick: Nausea, Vomiting, or Diarrhea
If you’re dealing with a stomach bug, food poisoning, or a bout of diarrhea, bland and binding foods are your starting point. The classic BRAT diet (bananas, rice, applesauce, toast) works for the first day or two because these foods are soft, low in fiber, and easy to keep down. Plain crackers, broth, and boiled potatoes fall into the same category.
That said, BRAT is no longer considered the gold standard it once was. It’s too low in protein, calcium, vitamin B12, and fiber to sustain you beyond the acute phase. The American Academy of Pediatrics no longer recommends it for children at all, noting it can actually slow recovery. For adults, think of it as a bridge: eat bland for a day, then start reintroducing normal foods as soon as you can tolerate them. Scrambled eggs, plain chicken, cooked carrots, and yogurt are good next steps.
Staying hydrated matters more than food choices during this phase. Small sips of water, diluted juice, or an electrolyte drink will do more for your recovery than any particular meal.
Bloating and Gas: The Low-FODMAP Approach
Chronic bloating, excess gas, and unpredictable bowel habits often point to sensitivity to certain fermentable carbohydrates. These are collectively called FODMAPs, and they’re found in surprisingly common foods like garlic, onions, wheat, apples, and milk. Your gut bacteria ferment these sugars rapidly, producing gas and drawing water into the intestine.
A low-FODMAP diet temporarily removes the worst offenders, then reintroduces them one at a time so you can identify your personal triggers. Foods that are generally well tolerated include:
- Grains: rice, oats, quinoa, rice noodles, gluten-free pasta, spelt sourdough bread
- Vegetables: eggplant, green beans, bok choy, carrots, cucumber, lettuce, potato, tomato, zucchini
- Fruits: cantaloupe, green kiwi, mandarin, orange, pineapple, firm bananas, blueberries, raspberries
Portion size matters with FODMAPs. Some foods are fine in small amounts but trigger symptoms at larger servings, so this isn’t a simple “safe or unsafe” list. The elimination phase typically lasts two to six weeks before you begin testing foods back in.
Acid Reflux and Heartburn
Reflux flares when stomach acid backs up into the esophagus, and certain foods relax the valve that’s supposed to keep it down or directly irritate the lining. The most common triggers are coffee and other caffeinated drinks, alcohol, chocolate, mint, spicy foods, high-fat meals, and acidic foods like citrus fruits and tomatoes.
What to eat instead: lean proteins like chicken and fish, non-citrus fruits (bananas, pears, melon), root vegetables, oatmeal, whole grain bread, and low-fat dairy. Cooking with less oil helps. So does eating your last meal at least two to three hours before lying down. Smaller, more frequent meals reduce the volume of food pressing against that valve at any given time.
Gastritis and Stomach Lining Irritation
Gastritis is inflammation of the stomach lining, and it makes your stomach reactive to foods that wouldn’t normally bother you. The goal is reducing acid production and avoiding anything that irritates the lining further.
Non-citrus fruits are particularly helpful here. Bananas and pears can reduce gastric juice production, which helps protect the stomach lining. Eggs are a gentle protein source. Low-fat yogurt adds beneficial bacteria without the irritation of full-fat dairy. Oats, rice, and quinoa are safe grain choices. Cooked vegetables are easier on the stomach than raw ones.
Fermented foods like yogurt and traditionally fermented dishes (think kimchi or miso in small amounts) can reduce stomach inflammation over time by improving the balance of gut bacteria. Avoid alcohol, coffee, fried foods, and anything heavily spiced until the inflammation settles.
How Fiber Affects Your Gut
Fiber is essential for digestive health, but the type of fiber you eat makes a real difference depending on your symptoms. There are two kinds, and they do opposite things in your gut.
Soluble fiber absorbs water and forms a gel-like substance that slows digestion. This is helpful when you have diarrhea because it firms up stool. You’ll find it in oat bran, barley, nuts, seeds, beans, lentils, and peas. Insoluble fiber does the reverse: it adds bulk and speeds things along, which is useful for constipation but can worsen diarrhea and bloating. Wheat bran, whole grain cereals, and raw vegetables are high in insoluble fiber.
If you’re currently symptomatic, lean toward soluble fiber sources and go easy on raw vegetables and bran cereals. As symptoms improve, gradually reintroduce insoluble fiber. A sudden jump in fiber intake of either type can cause gas and cramping, so increase your portions slowly over a week or two.
Why Cooked Beats Raw
Cooking vegetables makes them significantly easier to digest. Heat breaks down the cell walls and partially converts insoluble fiber into soluble fiber, which is gentler on the gut. Boiling and steaming both achieve this. The fiber compounds in vegetables partially break down into smaller sugars through hydrolysis, reducing the total digestive workload.
When your gut is sensitive, steamed carrots, zucchini, and green beans will sit far better than a raw salad. Pureeing cooked vegetables into soups takes this a step further by doing some of the mechanical breakdown that your stomach would otherwise handle. As your digestion stabilizes, you can gradually bring raw vegetables back.
Fermented Foods for Gut Health
Fermented foods deliver live beneficial bacteria directly to your digestive tract. Yogurt is the most accessible option, containing both Lactobacillus and Bifidobacterium strains. Kefir, a fermented milk drink, is another strong choice, and many people who are mildly lactose intolerant find it easier to digest than regular milk because the fermentation process breaks down much of the lactose.
Beyond dairy, sauerkraut, kimchi, tempeh, miso, and kombucha all contain beneficial bacteria. One important detail: the product needs to be genuinely fermented with live cultures, not just pickled in vinegar. Sauerkraut from the refrigerated section of a grocery store is typically live-cultured, while shelf-stable jars preserved with vinegar and heat often are not.
Start small. If your gut is already irritated, a large serving of sauerkraut or kombucha can temporarily increase gas and bloating as your microbiome adjusts. A tablespoon or two per day is a reasonable starting point.
Ginger and Peppermint for Symptom Relief
Ginger has the strongest evidence of any food-based remedy for nausea. Clinical trials consistently show that about 1,000 to 1,500 mg per day (roughly a half-inch to one-inch piece of fresh ginger root) reduces nausea from various causes. You can grate it into hot water for tea, add it to soups, or chew on crystallized ginger. Splitting the dose across the day works better than taking it all at once.
Peppermint targets a different problem. Enteric-coated peppermint oil capsules (180 to 200 mg taken three times daily before meals) have been shown to reduce abdominal pain, bloating, and irregular bowel habits in people with IBS. The enteric coating is important because it lets the oil reach your intestines rather than releasing in your stomach, where it can cause heartburn. If you have acid reflux, peppermint can actually make things worse by relaxing the valve between your stomach and esophagus, so it’s best suited for people whose primary issue is lower-gut discomfort.
Meal Size and Timing
Large meals force your stomach to produce more acid and stretch to accommodate the volume, which worsens nearly every digestive complaint. Eating two to three moderate meals per day, rather than one or two large ones, reduces the load on your system at any given time. If even moderate meals cause discomfort, temporarily splitting your intake into four or five smaller portions can help.
Eating slowly also matters. Chewing thoroughly and putting your fork down between bites gives your stomach time to signal fullness before you’ve overeaten. Eating your largest meal earlier in the day, rather than at dinner, aligns with your body’s natural digestive rhythms and can reduce nighttime reflux and morning bloating.