Several simple changes can help you poop more easily and more regularly: eating more fiber, drinking enough water, moving your body, and adjusting your position on the toilet. Most people who struggle with constipation, defined as fewer than three bowel movements per week, can improve things without medication. Here’s what actually works and why.
Eat More Fiber, but Add It Gradually
Fiber is the single most important dietary factor for regular bowel movements. Current guidelines recommend about 14 grams of fiber for every 1,000 calories you eat, which works out to roughly 25 to 30 grams a day for most adults. The average person falls well short of that.
Fiber works by absorbing water in your intestines, which makes stool bulkier, softer, and easier to pass. Good sources include beans, lentils, oats, berries, broccoli, and whole grains. If you’re not used to eating much fiber, increase your intake slowly over a week or two. Adding too much at once can cause bloating and gas, which defeats the purpose.
Prunes, Kiwifruit, and Psyllium Husk
Three foods have strong clinical evidence behind them for constipation relief. A trial published in the American Journal of Gastroenterology compared green kiwifruit (two per day), prunes (about 100 grams per day), and psyllium husk (12 grams per day) in people with chronic constipation. All three significantly increased bowel movement frequency within four weeks. Kiwifruit and prunes also improved stool consistency, making stools softer, and all three reduced straining.
Prunes are probably the most well-known remedy for a reason. They contain fiber plus a natural sugar alcohol called sorbitol that draws water into the intestines. Kiwifruit works similarly but tends to be gentler on the stomach, making it a good option if prunes cause cramping. Psyllium husk, sold as a powder you mix into water, is a bulk-forming fiber supplement that works well but needs to be taken with plenty of fluid to avoid making things worse.
Drink Enough Water
Fiber can only do its job if there’s enough water in your system. A study on adults with chronic constipation found that eating 25 grams of fiber daily improved stool frequency, but the effect was significantly stronger when participants also drank 1.5 to 2 liters of fluid per day. That’s roughly six to eight glasses.
You don’t need to obsess over hitting an exact number. Just pay attention to whether your urine is pale yellow, which is a reliable sign you’re adequately hydrated. If your urine is consistently dark, you’re likely not drinking enough, and your colon will compensate by pulling more water out of stool, leaving it hard and difficult to pass.
Why Coffee Makes You Need to Go
If you’ve noticed that your morning coffee sends you to the bathroom, that’s not a coincidence. Coffee stimulates contractions in the colon within as little as four minutes of drinking it. Caffeinated coffee increases colon activity by about 60% more than water, making it roughly as powerful as eating a full meal in terms of getting your gut moving.
Interestingly, decaf coffee also has this effect, just to a lesser degree. That tells researchers the mechanism isn’t purely about caffeine. Coffee appears to trigger a hormonal response in the gut lining that kick-starts the wave-like muscle contractions pushing stool forward. About a third of people experience this effect, and it’s more common in women. If you’re one of them, a cup of coffee in the morning is a perfectly reasonable tool.
Use a Footstool on the Toilet
The angle of your body on the toilet matters more than most people realize. When you sit on a standard toilet, the junction between your rectum and anal canal sits at roughly 80 to 90 degrees, which partially kinks the passage and requires more straining to push stool through. When you raise your knees above your hips, mimicking a squat, that angle opens to about 100 to 110 degrees. This straightens the rectal canal and lets stool pass with significantly less effort.
You don’t need a special product for this. Any small stool, a stack of books, or even an overturned box placed under your feet while you sit will do the trick. Lean forward slightly with your elbows on your knees. Many people notice an immediate difference.
Move Your Body Regularly
Physical activity stimulates your intestinal muscles to contract, partly as a side effect of increased heart rate and deeper breathing. Aerobic exercise like walking, jogging, cycling, or swimming is the most effective type. Research suggests that while short bursts of activity can help, consistent exercise over at least 12 weeks produces the most reliable improvement in how quickly food moves through your digestive tract.
Even a 20- to 30-minute walk after a meal can help trigger the natural reflex your body uses to move stool along. If you’ve been sedentary, this is one of the simplest changes you can make.
Probiotics That Speed Up Digestion
Certain probiotic strains can measurably reduce the time it takes food to travel through your gut. One well-studied strain, Bifidobacterium lactis HN019, was tested in a randomized trial of 100 adults. After just 14 days, the high-dose group saw their average gut transit time drop from 49 hours to 21 hours, a 33% reduction. The low-dose group saw a 25% reduction. The placebo group had no change at all.
Not all probiotics are the same. If you want to try one for constipation, look for products that list the specific strain on the label, not just the genus and species. Yogurt and fermented foods like kimchi and sauerkraut contain beneficial bacteria too, though at lower and more variable concentrations than supplements.
Over-the-Counter Laxatives
When lifestyle changes aren’t enough, three main types of laxatives are available without a prescription:
- Bulk-forming laxatives (like psyllium) work the same way dietary fiber does, holding water in the stool to make it softer and larger. These are the gentlest option and safe for daily use, but you need to drink plenty of water with them or they can actually cause blockages.
- Osmotic laxatives (like milk of magnesia or polyethylene glycol) pull water into the intestines from surrounding tissue. They’re effective for occasional use and work within a day or two for most people.
- Stimulant laxatives (like bisacodyl or senna) directly activate the nerves in your colon wall, forcing contractions and reducing water absorption. They’re the fastest-acting option but can cause cramping and shouldn’t be used regularly, as your bowel can become dependent on them.
Magnesium citrate, available as a liquid or tablet, works as both an osmotic laxative and a mild stimulant. It draws water into the colon while also increasing the wave-like contractions that move stool forward. It’s a common choice for more stubborn constipation but is best used occasionally rather than as a daily habit.
Signs Something More Serious Is Going On
Most constipation is functional, meaning it’s caused by diet, hydration, activity level, or stress rather than an underlying disease. But certain symptoms warrant a visit to your doctor: blood in your stool, severe abdominal pain, unintentional weight loss, or constipation that persists for longer than three weeks despite the changes described above. These can signal conditions that need evaluation beyond what dietary adjustments can address.