White rice is one of the most reliable foods to eat during a bout of diarrhea. It’s low in fiber, easy to digest, and helps add bulk to loose stools. While it won’t cure the underlying cause, it’s a safe choice that provides calories and energy without irritating your gut further.
Why White Rice Helps
White rice is processed to remove the bran and germ, which strips away most of the fiber. That’s normally considered a nutritional downside, but during diarrhea it’s an advantage. Insoluble fiber speeds up digestion and adds bulk in a way that can worsen loose stools. White rice does the opposite: its starch absorbs water in the intestine, which helps firm things up. The bland, neutral flavor also makes it easy to tolerate when your stomach is sensitive.
Rice starch has been studied extensively as an ingredient in oral rehydration solutions. A Cochrane review found that when rice powder replaced glucose in rehydration fluids, people with cholera had significantly lower stool output in the first 24 hours: 67 milliliters per kilogram of body weight less in children and 51 milliliters per kilogram less in adults. That benefit was specific to cholera, though. In children with non-cholera diarrhea (the kind most people experience from a stomach bug or food poisoning), the reduction was only about 4 milliliters per kilogram, which wasn’t statistically meaningful.
So while rice starch can clearly influence fluid absorption in the gut, the practical benefit of eating plain white rice during ordinary diarrhea is more about what it doesn’t do: it doesn’t irritate, it doesn’t rush through your system, and it gives your digestive tract something simple to work with while it recovers.
White Rice vs. Brown Rice
Brown rice keeps its bran layer intact, which means more fiber, magnesium, potassium, and B vitamins. Under normal circumstances, that makes brown rice the more nutritious option. During diarrhea, it’s the wrong choice. The extra fiber is harder to digest and can speed things through your intestines when you want the opposite effect.
Harvard Health specifically notes that white rice is easier to digest because of its lower fiber content, and that people with irritable bowel syndrome or inflammatory bowel disease may benefit from choosing white rice during flare-ups. The same logic applies to acute diarrhea from any cause. Stick with white rice until your stools return to normal, then transition back to whole grains.
The BRAT Diet: Still Useful, but Limited
White rice is one of the four foods in the classic BRAT diet (bananas, rice, applesauce, toast), which has been recommended for decades as a go-to approach for upset stomachs. It still works as a short-term strategy, but medical thinking has shifted. No clinical studies have compared the BRAT diet head-to-head against other options, and the CDC has described it as “unnecessarily restrictive,” noting that it can provide suboptimal nutrition for a recovering gut.
Harvard Health’s current guidance is that following the BRAT diet for a day or two is fine, but there’s no reason to limit yourself to just those four foods. Brothy soups, oatmeal, boiled potatoes, crackers, and unsweetened dry cereals are equally easy to digest. The key principle is choosing bland, low-fiber, low-fat foods rather than sticking to a rigid list.
How to Eat White Rice During Diarrhea
Cook it plain, without butter, oils, or heavy sauces. A small amount of salt is fine and actually helps replace electrolytes you’re losing. You can pair it with lean protein like boiled chicken, which adds nutrition without much digestive burden. Eating smaller portions more frequently tends to be easier on the stomach than sitting down to a large meal.
Stay hydrated alongside eating rice. Diarrhea’s biggest risk is dehydration, and rice alone doesn’t replace lost fluids or electrolytes. Water, clear broths, and oral rehydration solutions do the heavy lifting on that front. Think of white rice as one part of recovery, not the whole strategy.
How Long to Stay on a Bland Diet
Most cases of acute diarrhea from a stomach virus or food poisoning resolve within one to three days. During that window, leaning on white rice and other bland foods makes sense. Research on persistent diarrhea used a seven-day benchmark: if stool consistency improved from liquid to soft within a week of dietary changes, the approach was considered successful.
If your symptoms haven’t improved after a couple of days, start reintroducing a wider variety of foods so you don’t miss out on important nutrients. A diet of nothing but white rice and toast lacks adequate protein, fat, vitamins, and minerals. Your gut needs a range of nutrients to heal, and prolonged restriction can slow recovery rather than help it. If diarrhea persists beyond a week, something more than diet is likely going on.