Several everyday habits can meaningfully speed up how quickly food moves through your digestive system. The full journey from mouth to exit takes roughly 30 to 40 hours on average, though it can stretch to 72 hours and still be considered normal. Most of the levers you can pull involve how you eat, what you eat, and what you do in the hours after a meal.
Chew Your Food More Thoroughly
This is the simplest change with some of the strongest evidence behind it. When you chew food into smaller particles, those particles mix more effectively with stomach acid and digestive enzymes, which accelerates gastric emptying. A 2025 study on rice digestion found that people who broke food into finer pieces during chewing had significantly less food retained in their stomach at the end of gastric digestion compared to those who chewed weakly. The strong chewers produced particles under 9 square millimeters, while weak chewers left behind particles of 12 to 15 square millimeters. Those larger pieces sit in the stomach longer because the stomach has to do more mechanical and chemical work to break them down.
Eating quickly compounds the problem. Weak chewing combined with fast eating produced the highest gastric retention rate in the study. There’s no magic number of chews per bite, but the goal is straightforward: put your fork down between bites and chew until the food is a smooth paste before swallowing.
Eat More Fiber (and the Right Kind)
Fiber is the single most important dietary factor for keeping food moving through your intestines. Insoluble fiber, found in whole grains, vegetables, and wheat bran, adds bulk to stool and physically pushes material through the colon. Soluble fiber, found in oats, beans, and fruits, absorbs water and forms a gel that softens stool and makes it easier to pass.
Most adults fall well short of recommended intake. Federal dietary guidelines suggest 25 to 28 grams per day for women and 28 to 34 grams for men, depending on age. The average American gets about 15 grams. Closing that gap doesn’t require a dramatic diet overhaul. Adding a serving of beans, swapping white rice for brown, or eating fruit with the skin on can each add 3 to 5 grams. Increase fiber gradually over a week or two, though, because a sudden jump can cause bloating and gas while your gut adjusts.
Stay Hydrated Throughout the Day
Water works alongside fiber to keep digestion efficient. It helps break down food so your body can absorb nutrients, and it softens stool to prevent constipation. Without enough fluid, even a high-fiber diet can backfire and slow things down, since fiber without water can become dense and harder to pass. You don’t need to force huge volumes at meals. Sipping water consistently throughout the day is more effective than drinking a lot at once.
Move Your Body After Eating
Physical activity stimulates the muscles lining your intestines, helping food move through the colon faster. You don’t need intense exercise. A 10 to 20 minute walk after a meal is enough to measurably reduce transit time. This is one reason sedentary people tend to experience more bloating and constipation: without regular movement, the colon slows down.
Timing matters. Gentle movement like walking is fine right after eating. High-intensity exercise on a full stomach, on the other hand, can divert blood flow away from the digestive tract and actually delay gastric emptying, potentially causing nausea or cramping.
Pay Attention to What Slows You Down
After you eat a typical solid meal, the stomach does very little for the first 20 to 30 minutes. Then it begins emptying at a roughly steady rate. But the composition of your meal heavily influences how long that process takes. Fat is the slowest macronutrient to digest. A meal high in fat signals your stomach to slow down so the small intestine has time to process lipids. Protein takes moderate time. Simple carbohydrates and liquids move through fastest.
This doesn’t mean you should avoid fat or protein. Both are essential. But if you’re feeling uncomfortably full or sluggish after meals, look at whether your meals are very heavy in fried foods, cheese, red meat, or cream-based sauces. Balancing those with vegetables, whole grains, and lighter proteins can noticeably reduce that post-meal heaviness.
Consider Probiotics for Sluggish Transit
If constipation is your main concern, probiotics have decent evidence for speeding up colon transit. A meta-analysis of randomized controlled trials found that probiotic consumption reduced whole gut transit time by an average of nearly 14 hours compared to placebo. Multispecies probiotics (supplements containing several bacterial strains) showed the strongest effects, and Bifidobacterium lactis was highlighted as particularly beneficial.
Results vary from person to person, and probiotics tend to help most in people who are already experiencing slow transit or constipation. If your digestion is already functioning normally, the effect may be minimal. Fermented foods like yogurt, kefir, kimchi, and sauerkraut provide probiotic bacteria naturally, though in lower and less standardized doses than supplements.
Skip the Digestive Enzyme Supplements
Over-the-counter digestive enzyme supplements are widely marketed for faster digestion, but the evidence doesn’t support those claims for most people. Johns Hopkins Medicine notes that a healthy person doesn’t need supplemental enzymes, and that these products aren’t regulated by the FDA, meaning their dosage, ingredients, and enzyme concentration aren’t guaranteed. Claims about enzymes promoting weight loss or reducing bloating are not backed by reliable evidence.
The same applies to so-called enzyme-rich foods like pineapple and avocado. While they contain natural enzymes, there’s no real evidence these speed up digestion in a meaningful way. If you have a diagnosed condition like pancreatic insufficiency, your doctor may prescribe pharmaceutical-grade enzymes. But for general digestive sluggishness, the behavioral changes above will do far more.
Your Sleep Position Plays a Role
If you eat close to bedtime, sleeping on your left side can help. The anatomy is straightforward: when you lie on your left side, your stomach sits below your esophagus, which lets gravity help keep stomach acid where it belongs and allows the stomach to empty more naturally. This is particularly useful for reducing acid reflux, but it also means food isn’t pooling against the lower esophageal sphincter and can move into the small intestine more freely. Sleeping on your right side or flat on your back reverses this advantage.