Several things can help you poop, from quick fixes like coffee and adjusting your posture to longer-term habits like eating more fiber and drinking enough fluids. What works fastest depends on whether you need relief right now or want to prevent constipation from happening in the first place.
Fiber: The Most Reliable Long-Term Fix
Fiber is the single most effective dietary tool for keeping bowel movements regular. The recommended intake is about 14 grams per 1,000 calories you eat, which works out to roughly 25 grams a day for most women and 38 grams for most men. Most people fall well short of that.
Not all fiber works the same way, and the old “soluble vs. insoluble” distinction is more nuanced than most people realize. What actually matters is whether the fiber survives digestion long enough to reach your colon intact. Two specific types do this well. Large, coarse insoluble fiber particles (like those in wheat bran) physically irritate the gut lining, triggering it to release water and mucus. Gel-forming soluble fiber (like psyllium husk) holds onto water and resists being dried out as waste moves through the colon. Both mechanisms result in softer, bulkier stools that are easier to pass.
Good sources of coarse insoluble fiber include wheat bran, whole grain bread, and many vegetables. For gel-forming soluble fiber, psyllium husk (found in products like Metamucil) is one of the most effective options. If you’re adding fiber to your diet, increase gradually over a week or two. A sudden jump can cause bloating and gas while your gut adjusts.
Drink More Fluids
Dehydration makes stool harder and more difficult to pass. A large study of over 14,000 adults found a clear, dose-dependent relationship between fluid intake and constipation risk. Compared to people who drank the least (under about 8 cups a day from all sources, including food), those in the highest intake group cut their constipation risk nearly in half. The benefit wasn’t all-or-nothing either. Even moderate increases in fluid intake made a measurable difference, with people in the middle range reducing their risk by about 40%.
Water is the simplest choice, but fluids from food, soup, tea, and other beverages all count. If you’re eating more fiber, drinking more water becomes especially important, since fiber needs water to do its job.
Prunes and Other Natural Laxatives
Prunes work, and they work for a specific reason: they contain sorbitol, a sugar alcohol that draws water into the intestines. Prune juice also contains pectin and polyphenols that contribute to the effect. In a randomized controlled trial, people who consumed about 54 grams of prune juice daily (roughly a quarter cup) for eight weeks saw improvements in both stool consistency and subjective symptoms.
Kiwifruit is another well-studied option. Two kiwis a day has been shown in multiple trials to increase stool frequency and soften consistency. Other foods with mild laxative effects include figs, flaxseed, and chia seeds.
Coffee Works Fast
If you’ve noticed that your morning coffee sends you to the bathroom, you’re not imagining it. Coffee stimulates movement in the colon in about 29% of people, and it can kick in remarkably fast. Increased activity in the lower colon has been measured as quickly as four minutes after drinking coffee.
Interestingly, this isn’t just a caffeine effect. Decaf coffee triggers a similar response in people who are sensitive to it. The mechanism likely involves hormones that coffee stimulates your gut to release, which then speed up contractions in the lower intestine. If coffee works for you, it’s one of the fastest natural options available.
Adjust Your Sitting Position
Your body position on the toilet matters more than most people think. When you sit on a standard toilet with your hips and knees at 90 degrees, a muscle called the puborectalis creates a kink in the rectum, with the anorectal angle sitting at roughly 80 to 90 degrees. This makes passing stool harder and slower.
A squatting position opens that angle to about 100 to 110 degrees, straightening the rectum and making evacuation easier. You don’t need a squat toilet to get this benefit. Placing a small footstool (6 to 9 inches tall) under your feet while sitting and leaning slightly forward mimics the key angles of squatting. Many people notice an immediate difference.
Probiotics for Ongoing Constipation
Specific probiotic strains can help if you’re dealing with chronic sluggishness rather than a one-time problem. One of the best-studied strains is Bifidobacterium animalis subsp. lactis HN019. In a double-blind trial of people who had fewer than three bowel movements per week, those taking this probiotic added about two extra bowel movements per week compared to placebo and experienced less straining. Effects typically take a few weeks to build up, so probiotics aren’t a quick fix.
Over-the-Counter Laxatives
When dietary changes aren’t enough, several types of OTC laxatives are available, and they vary widely in how fast they work:
- Enemas and suppositories: 15 minutes to one hour. The fastest option for acute relief.
- Stimulant laxatives: 6 to 12 hours. These trigger contractions in the intestinal wall.
- Lubricant laxatives: 6 to 8 hours. These coat stool to help it slide through more easily.
- Osmotic laxatives: 1 to 3 days for most types, though saline versions can work in 30 minutes to 6 hours. These draw water into the intestines, similar to how prunes work.
- Stool softeners: 12 hours to 3 days. These add moisture to stool but don’t stimulate contractions.
- Bulk-forming laxatives: 12 hours to 3 days. These are essentially concentrated fiber supplements.
Magnesium-based products (like magnesium citrate or magnesium oxide) are a popular osmotic option. Magnesium is converted through a series of reactions in your stomach and small intestine into compounds that increase the water content and volume of stool, which then triggers the intestinal wall to push things along. These are effective but shouldn’t be used at high doses long-term, as excessive magnesium can build up in the blood.
Exercise Helps, but Not How You Think
You’ll often hear that exercise prevents constipation, but the direct evidence is surprisingly weak. One study measuring actual transit times found no significant change between rest and exercise periods. The average transit time dropped from about 24.5 hours to 20.9 hours with exercise, but the variation between individuals was so large that the difference wasn’t statistically meaningful.
That said, regular physical activity does appear to reduce constipation risk in population studies, likely through indirect effects: it reduces stress, supports healthy eating patterns, and may influence gut hormone signaling. Walking after meals is a simple habit that many people find helpful, even if the mechanism isn’t fully pinned down.
When Constipation Signals Something More
Occasional constipation is extremely common and usually responds to the strategies above. But if you notice blood in your stool, experience severe abdominal pain, have unexplained weight changes, or constipation that persists for more than three weeks despite trying these approaches, those warrant a medical evaluation to rule out underlying causes.