How to Relieve Constipation: 9 Remedies That Actually Work

About 16% of American adults deal with constipation symptoms at any given time. Past age 60, that number doubles to roughly one in three. It is one of the most common GI complaints doctors hear, and most people try to fix it on their own before ever bringing it up.

The problem is that "drink more water" and "eat more fiber" are so vague they barely count as advice. Below are nine specific, research-backed remedies - ranked from the simplest dietary fixes to the over-the-counter options worth knowing about - along with the actual evidence behind each one.

1. Get the Right Kind of Fiber

Not all fiber works the same way for constipation. A 2022 meta-analysis of 16 randomized controlled trials (1,251 participants) found that psyllium husk was the most effective fiber supplement tested - 66% of participants in fiber groups responded to treatment versus 41% in control groups.

The dose matters. Fiber supplements only outperformed placebo at doses above 10 g per day, and the benefits became clearest after at least four weeks of consistent use. The NIDDK recommends adults get 22 to 34 grams of total dietary fiber daily.

One important caveat: increase fiber gradually. Adding too much too fast causes bloating and gas, which is one of the main reasons people abandon fiber before it starts working. Add about 5 grams per day each week until you hit your target. Whole food sources - beans, lentils, oats, broccoli, berries - are ideal because they bring water content and micronutrients along for the ride.

2. Eat Prunes (Seriously)

Prunes have a reputation as a grandparent remedy, but the clinical data behind them is surprisingly strong. In a randomized crossover trial, 100 g of prunes per day (about 10 prunes) produced 3.5 complete spontaneous bowel movements per week compared to 2.8 with psyllium. Stool consistency also improved - 3.2 versus 2.8 on the Bristol Stool Scale.

Prunes work through a combination of mechanisms: they contain sorbitol (a natural osmotic agent), fiber, and polyphenols that may stimulate intestinal fluid secretion. A systematic review confirmed that prunes appear superior to psyllium for both stool frequency and consistency. For something you can buy at any grocery store, that is a remarkable track record.

3. Two Kiwis a Day

Kiwifruit is the constipation remedy most people haven't heard of. A multicenter randomized controlled trial found that eating two green kiwifruits daily increased complete spontaneous bowel movements by 1.5 per week in people with functional constipation (P < 0.0001). Abdominal comfort improved too.

What makes kiwi particularly interesting is its tolerability. In a comparative effectiveness trial pitting kiwifruit against prunes and psyllium, kiwi had the lowest rate of side effects and the fewest people who quit due to dissatisfaction. If fiber supplements give you gas or prunes aren't your thing, kiwi is a solid alternative with real clinical backing.

4. Water - But With Context

The "just drink more water" advice is everywhere, but the evidence is more nuanced than most people realize. A controlled study in healthy volunteers found that extra fluid intake alone did not produce a significant increase in stool output. Plain water, by itself, is not a reliable laxative if you're already adequately hydrated.

Where water becomes genuinely important is as a force multiplier for fiber. A separate clinical trial showed that combining 25 g of daily fiber with 1.5 to 2.0 liters of water per day significantly enhanced stool frequency compared to fiber alone. And in people who are actually dehydrated - common among older adults and anyone on medications like diuretics - mild dehydration is a documented risk factor for constipation.

Bottom line: water won't fix constipation on its own, but skimping on it will undermine everything else you're doing.

5. Move Your Body

A meta-analysis of nine randomized controlled trials (680 participants) found that exercise nearly doubled the odds of constipation improvement (RR = 1.97). Aerobic exercise showed an even stronger effect (RR = 2.42). Walking, jogging, cycling - the type matters less than the consistency.

Physical activity accelerates colonic transit time, which is exactly what you want when stool is sitting in the colon too long and drying out. Even moderate activity helps. A systematic review of cohort studies confirmed that moderate physical activity levels reduced constipation risk compared to low activity, and meeting international physical activity guidelines (150 minutes per week of moderate exercise) was enough to see benefits.

You don't need to train for a marathon. A daily 20-30 minute walk is a legitimate constipation intervention.

6. Fix Your Toilet Posture

This one sounds trivial. It is not. The puborectalis muscle wraps around the rectum like a sling, creating a kink that helps maintain continence. When you sit on a standard toilet with your thighs at 90 degrees, that kink stays partially in place. Research comparing sitting and squatting postures found that squatting straightens the anorectal angle, reduces straining, and shortens the time to complete evacuation.

A study on defecation posture modification devices (toilet stools that raise your knees above your hips) found they improved bowel emptiness and reduced straining in healthy subjects. You don't need a special product - any sturdy stool or box that elevates your feet 6 to 8 inches works. Lean forward slightly, relax your abdomen, and let gravity assist.

7. Use Coffee Strategically

Coffee promotes colonic contractions within four minutes of drinking it, and the effect is 60% stronger than water and 23% stronger than decaf, according to a study measuring colonic motor activity. About 29% of people report that coffee stimulates a bowel movement, with the effect being more common in women.

The mechanism goes beyond caffeine. Decaf coffee also stimulates the colon, though less potently - researchers identified compounds in coffee that contract gut smooth muscle through muscarinic receptor pathways. If you already drink coffee in the morning, timing it about 30 minutes before you'd like to have a bowel movement can work in your favor.

That said, coffee is a short-term tool, not a long-term constipation fix. And it can make things worse for people with IBS, where caffeine is a known trigger.

8. Establish a Routine

Your colon has a natural reflex called the gastrocolic reflex - it ramps up motility after eating, particularly after breakfast. Ignoring the urge to go, rushing through meals, or irregular schedules can blunt this reflex over time.

The practical application: try sitting on the toilet for 5 to 10 minutes after breakfast each morning, even if you don't feel a strong urge. Don't strain - just give your body the opportunity. The NIDDK specifically recommends this kind of bowel habit training as part of first-line constipation management.

Consistency matters more than any single remedy. Your colon responds to patterns, and tracking when you go helps you spot yours. Over a few weeks of logging with something like the Bristol Stool Scale, most people can identify whether their constipation follows meals, stress, travel, or specific foods.

9. When to Try OTC Laxatives

If dietary changes and lifestyle adjustments haven't moved things along after two to three weeks, over-the-counter laxatives are a reasonable next step. But they're not interchangeable, and reaching for the wrong type first is a common mistake.

Osmotic Laxatives (Best First Choice)

Polyethylene glycol 3350 (MiraLAX) draws water into the colon to soften stool. It has the strongest evidence base of any OTC constipation medication and is recommended as a first-line pharmacological treatment in the AGA-ACG clinical practice guidelines for chronic idiopathic constipation. It takes 1 to 3 days to work and is generally safe for longer-term use under medical guidance.

Magnesium-based laxatives (magnesium citrate, magnesium oxide) also work osmotically. A randomized controlled trial found magnesium oxide improved overall constipation symptoms in 68.3% of participants versus 11.7% on placebo. These are best for occasional use - not daily.

Bulk-Forming Laxatives

Psyllium and methylcellulose fall here too. They work like supplemental fiber and are safe for long-term use. If you're already eating a high-fiber diet and still constipated, adding more bulk may not be the answer.

Stimulant Laxatives

Bisacodyl (Dulcolax) and senna directly stimulate intestinal contractions. They work fast - usually within 6 to 12 hours - but are meant for short-term use. Long-term reliance on stimulant laxatives can reduce your colon's natural motility. Reserve these for occasional breakthrough constipation, not daily management.

Stool Softeners

Docusate sodium (Colace) is widely recommended but has surprisingly weak evidence supporting its effectiveness. If you need something beyond fiber, osmotic laxatives are the better-studied choice.

What Constipation Actually Is

Before trying remedies, it helps to know what qualifies. Constipation isn't just about frequency. You can go every day and still be constipated if you're straining, passing hard stools, or feeling incomplete evacuation.

The clinical definition (Rome IV criteria) requires two or more of the following for at least three months:

• Straining during more than 25% of bowel movements
• Hard or lumpy stools (Bristol Types 1-2) more than 25% of the time
• Sensation of incomplete evacuation more than 25% of the time
• Sensation of blockage more than 25% of the time
• Manual maneuvers to facilitate more than 25% of bowel movements
• Fewer than three spontaneous bowel movements per week

If you're unsure whether your pattern counts, tracking your bowel movements for two weeks gives you (and your doctor) something concrete to evaluate rather than relying on memory. Stool form, frequency, and symptoms like straining all matter - and they're easy to lose track of without a log.

When to See a Doctor

Most constipation responds to the strategies above. But certain symptoms require medical evaluation rather than home remedies:

• Blood in your stool - any amount, any color
• Constipation lasting longer than three weeks despite dietary changes
• Unexplained weight loss
• New-onset constipation after age 50 with no clear dietary cause
• Severe abdominal pain or vomiting
• Alternating constipation and diarrhea (may indicate IBS or another condition)
• Persistently thin, ribbon-like stools

These can be signs of something beyond functional constipation - including medication side effects, thyroid dysfunction, or in rarer cases, structural problems that need investigation. A change in bowel habits that persists is always worth a conversation with your doctor, especially if you're over 45, when colorectal cancer screening should be on your radar regardless.

Tracking Makes the Difference

One of the trickiest things about constipation is figuring out what's causing it. Diet, hydration, stress, sleep, medications, menstrual cycle - any of these can be the culprit, and most people are dealing with more than one factor at a time.

A stool diary cuts through the guesswork. When you track what you eat, how much you drink, your activity level, and your bowel movements side by side, patterns emerge that you'd never spot from memory alone. This is exactly why the NIDDK and most gastroenterologists recommend keeping one, especially when trying new remedies and needing to know what's actually working.