Most constipation responds well to a handful of straightforward changes: more fiber, more water, more movement, and better toilet habits. If those don’t work, over-the-counter options can get things moving within hours to days. Here’s what actually helps, starting with the approaches worth trying first.
Fiber Is the First Line of Defense
Dietary fiber is the single most effective everyday tool for preventing and relieving constipation. It works through two different mechanisms depending on the type. Insoluble fiber (found in wheat bran, vegetables, and whole grains) physically irritates the intestinal wall, triggering it to secrete mucus and water. That creates larger, softer stools that move through your colon faster. Soluble gel-forming fiber (found in oats, beans, and psyllium supplements) works differently. It holds onto water like a sponge, resisting the colon’s natural tendency to absorb moisture and dry out your stool.
Psyllium husk is particularly useful because it acts as a stool normalizer. It softens hard stool, adds bulk, and speeds transit time. If you’re looking for a fiber supplement, psyllium is the one with the strongest evidence behind it.
Most adults fall short of their daily fiber targets. The U.S. Dietary Guidelines recommend 25 to 28 grams per day for women and 31 to 34 grams per day for men, depending on age. The average American gets roughly half that. Closing that gap makes a real difference, but increase your intake gradually over a week or two. A sudden jump in fiber can cause bloating and gas that makes you want to quit before it starts helping.
Water Makes Fiber Work
Fiber without adequate fluid can actually make constipation worse. Fiber absorbs water to do its job. If there isn’t enough water available, you end up with a dense, dry mass that’s even harder to pass. Aim for at least 48 to 64 ounces of water per day, and lean toward the higher end if you’re actively increasing your fiber intake. Coffee and tea count toward your fluid total, though plain water is the simplest option.
Foods That Act as Natural Laxatives
Prunes are the classic home remedy for constipation, and they genuinely work. They contain sorbitol, a sugar alcohol that draws water into the intestines the same way osmotic laxatives do. In one study, participants eating 80 to 120 grams of prunes daily (roughly 8 to 12 prunes) had significantly more bowel movements and heavier stools after four weeks. Even prune juice helps: 54 grams daily produced softer stools within three weeks.
Other foods with mild laxative effects include kiwifruit, ground flaxseed, figs, and ripe pears. These all combine fiber with water-holding properties that soften stool. Kiwifruit in particular has shown up repeatedly in research as a gentle, well-tolerated option.
Movement Speeds Up Your Colon
Physical activity stimulates the wave-like contractions (peristalsis) that push stool through your colon. Exercise also increases production of compounds called prostaglandins, which further promote intestinal movement. Research published in the Journal of Neurogastroenterology and Motility found that women with high physical activity levels had significantly shorter colon transit times than those with low or moderate activity levels. The effect was measurable across different segments of the colon.
You don’t need intense workouts. A 20 to 30 minute walk, especially after a meal, can be enough to get things moving. The key is consistency. Regular daily movement matters more than occasional vigorous exercise.
Change Your Position on the Toilet
The standard sitting position on a modern toilet isn’t ideal for your anatomy. When you sit upright, a sling-like muscle called the puborectalis creates a kink in the pathway between your colon and rectum. Raising your knees above your hips, either with a footstool or a dedicated squatting stool, increases the angle and straightens that pathway. This lets stool pass with less straining. If you don’t have a stool, leaning forward with your elbows on your knees and your feet on tiptoes achieves a similar effect.
Over-the-Counter Laxatives
When dietary changes aren’t enough, laxatives can help. They fall into two main categories, and understanding the difference helps you pick the right one.
Osmotic Laxatives
These pull water into your colon to soften stool. Polyethylene glycol (sold as MiraLAX) is the most commonly recommended option. It’s gentle, non-habit-forming, and typically takes one to three days to produce results. Magnesium hydroxide (Phillips’ Milk of Magnesia) works faster, often within 30 minutes to six hours. These are a good first choice for occasional constipation because they work with your body’s natural processes rather than forcing contractions.
Stimulant Laxatives
These activate the nerves controlling your colon muscles, forcing contractions that push stool along. Common options include bisacodyl (Dulcolax tablets) and senna. They typically work within 6 to 12 hours, which is why many people take them at bedtime for a morning result. Stimulant laxatives are effective but best reserved for when gentler options haven’t worked. Using them daily for extended periods can make your colon less responsive over time.
Probiotics for Chronic Constipation
If constipation is an ongoing problem rather than an occasional annoyance, probiotics may help. Two strains have the most evidence behind them. Bifidobacterium lactis has been shown to increase how often you go, though its effect on stool consistency is less clear. Lactobacillus casei Shirota (the strain in Yakult drinks) appears to do more: it increased both stool frequency and consistency while reducing pain, straining, bloating, and the feeling of incomplete evacuation across multiple studies.
Probiotics aren’t a quick fix. Expect to use them for several weeks before noticing a difference. They work best as part of a broader approach that includes fiber and adequate hydration. Prebiotic fiber like inulin (found in chicory root, garlic, and onions) feeds beneficial gut bacteria and may amplify the effect.
When Constipation Signals Something Else
Occasional constipation is almost always harmless. But certain warning signs suggest something beyond a simple backup. Blood in your stool, unexplained weight loss of more than 10 pounds, a noticeable change in the shape or caliber of your stool, or iron deficiency anemia all warrant prompt evaluation. Constipation that starts suddenly in someone over 50, especially with no prior history, also deserves medical attention. These don’t necessarily mean something serious is wrong, but they’re signals your doctor will want to investigate rather than treat with fiber alone.
A Practical Starting Plan
If you’re dealing with constipation right now, layer these approaches in order. Start by drinking more water and adding a fiber-rich food to every meal, or take a psyllium supplement. Get moving daily, even if it’s just a walk. Try a footstool under your feet on the toilet. If nothing has changed in a week, try an osmotic laxative like polyethylene glycol for a few days. Save stimulant laxatives for when you need more immediate relief. For chronic, recurring constipation, add a probiotic and give it three to four weeks to take effect.