White rice is one of the easiest grains for your body to digest. It’s low in fiber, soft when cooked, and breaks down quickly in the gut, which is why it’s a go-to food during stomach illness and a common first solid food for infants. But not all rice is created equal. The variety you choose, how you cook it, and whether you eat it hot or cold all change how your digestive system handles it.
Why White Rice Digests So Quickly
Rice is mostly starch, and the type of starch determines how fast your body breaks it down. Starch in rice comes in two forms: one with a branching structure that digestive enzymes can attack from many angles at once, and another with a compact, linear structure that resists breakdown. White rice varieties that are sticky or short-grain tend to have more of the easily digested branching starch. In waxy (sticky) rice, up to 95% of the starch is rapidly digested. High-amylose varieties like basmati digest more slowly, with only 35 to 53% of starch classified as rapidly available.
White rice also has its outer bran layer removed during milling. That bran is where the fiber lives, so without it, there’s very little to slow digestion down. The result is a grain that moves through your stomach relatively fast and puts minimal strain on your digestive system.
Brown Rice Is a Different Story
Brown rice keeps its bran layer intact, which changes the digestive picture significantly. In human studies, brown rice delayed gastric emptying compared to white rice regardless of the variety tested. Your stomach simply takes longer to process it because the bran acts as a physical barrier, slowing the rate at which digestive enzymes reach the starch underneath.
That slower emptying is part of why brown rice produces a lower blood sugar spike than white rice. For everyday health, that’s generally a benefit. But if you’re dealing with nausea, diarrhea, or a sensitive stomach, the extra fiber and slower transit can work against you. Brown rice also contains higher levels of a compound called phytic acid, concentrated in the bran layer. Phytic acid binds to minerals like iron, zinc, and magnesium, making them harder for your body to absorb. It accounts for about 75% of the phosphorus stored in rice seeds and is a well-documented factor in reduced mineral absorption.
Soaking brown rice before cooking can help reduce phytic acid levels, especially at warmer water temperatures. This won’t turn brown rice into white rice from a digestibility standpoint, but it does improve mineral availability and can soften the grain further.
How Cooking and Cooling Change Digestion
Freshly cooked, hot white rice is at its most digestible. As rice cools, some of the starch rearranges into a more rigid structure that resists digestion. This is called retrogradation, and it meaningfully changes what happens in your gut.
In one clinical study, freshly cooked white rice contained about 0.64 grams of resistant starch per 100 grams. After cooling at room temperature for 10 hours, that more than doubled to 1.30 grams. Rice that was refrigerated for 24 hours and then reheated reached 1.65 grams of resistant starch, and it produced a significantly lower blood sugar response in healthy adults compared to freshly cooked rice. So reheating doesn’t fully reverse the process. If easy digestion is your priority (during illness, for example), eating rice freshly cooked and still warm is the way to go. If you want the metabolic benefits of slower digestion, cooking rice ahead and refrigerating it before reheating works in your favor.
Which Varieties Digest Fastest
Glycemic index (GI) is a useful proxy for digestion speed: higher GI means faster breakdown and absorption. A study testing commercially available rice in Great Britain found GI values ranging from 37 to 92 across different products.
- Sticky (glutinous) rice: The fastest to digest, with the highest proportion of rapidly available starch. This is the rice served in many Thai and East Asian dishes.
- Jasmine rice: A medium to high GI white rice that digests quickly. Its soft, slightly sticky texture reflects its starch profile.
- Basmati rice: Classified as a low-GI food in the study. Its higher proportion of slowly digested starch makes it one of the gentler options for blood sugar, though it’s still easy on the stomach.
- Long-grain white rice: Also low-GI, similar to basmati. Easy-cook (parboiled) long-grain rice was likewise in the low-GI category.
If you need something that breaks down as fast and gently as possible, sticky or jasmine rice is your best bet. If you want easy digestion with a more gradual energy release, basmati or long-grain white rice strikes that balance.
Rice and Digestive Conditions
Rice holds a unique position among grains for people with digestive disorders. It’s one of the few starches classified as low-FODMAP, meaning it doesn’t contain the types of short-chain carbohydrates that ferment in the gut and cause gas, bloating, and pain. Wheat, rye, and many other grains are high-FODMAP and can trigger symptoms in people with irritable bowel syndrome. Rice, quinoa, and gluten-free alternatives don’t carry that risk.
This matters because a low-FODMAP diet has been shown to improve IBS symptoms in about 70% of people who follow it. Rice is often one of the safest staple carbohydrates for those individuals, providing energy without the bloating or cramping that wheat-based foods can cause. It’s also naturally gluten-free, so it works for people with celiac disease or gluten sensitivity.
The classic BRAT diet (bananas, rice, applesauce, toast) has long been recommended during bouts of stomach flu, food poisoning, or traveler’s diarrhea. Cleveland Clinic notes that these foods are soft, bland, and low in fiber, making them gentle on an irritated GI tract. They won’t cure nausea, but they’re a practical way to get calories in when your system is struggling to keep anything down.
Rice as a First Food for Babies
Rice cereal became a standard first solid food for infants because it’s easy to digest, well-tolerated during the transition from breast milk or formula, and unlikely to trigger allergic reactions the way wheat can. Current guidelines recommend waiting until six months of age before introducing any solid food, including rice cereal.
One concern worth knowing about: rice absorbs arsenic from soil and water more readily than other grains. The FDA has noted that infant rice intake, relative to body weight, is about three times higher than adult intake, and has proposed limits on inorganic arsenic in infant rice cereal. The American Academy of Pediatrics recommends not feeding rice cereal every day and not making it the only food in a meal. Offering a rotation of iron-fortified cereals (oat, barley, multigrain) alongside rice helps reduce exposure while still giving your baby easy-to-digest options.
Tips for Making Rice Easier to Digest
If you’re eating rice specifically because you need something gentle on your stomach, a few simple choices make a difference. Choose white rice over brown. Pick a sticky or short-grain variety if speed of digestion matters most. Eat it freshly cooked and warm rather than cold or reheated. Cook it with plenty of water so the grains are soft rather than firm.
If you prefer brown rice for its nutritional benefits but find it harder on your stomach, soaking it for several hours before cooking softens the grain and reduces the compounds that interfere with mineral absorption. Cooking it longer than you would white rice, until the grains are very tender, also helps your digestive system do less work.