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It’s possible to switch up your poop schedule with a few simple strategies and some patience.

Reviewed by Dietitian Katey Davidson, M.Sc.FN, RD, CPT

Key Points

• It’s possible to change your poop schedule by working with your body’s natural rhythms.
• Bowel retraining and consistent meals help train your body to go at set times.
• Coffee, magnesium and fiber can support more predictable bowel movements.

Your body may have a steady rhythm when it comes to pooping, which is generally a good thing. However, it might not always happen at the most convenient time depending on your itinerary. This may lead you to wonder if you can change your poop schedule. To answer this question, we spoke with two gut-health doctors who shared research-backed tips and simple practices you can implement at home to help switch things up.

Can You Change Your Poop Schedule?

“Yes, it is genuinely possible for most people to shift or establish a more predictable bowel schedule,” says Anju Malieckal, M.D. “The reasoning is grounded in well established physiology.”

Malieckal notes that bowel timing is largely governed by the gastrocolic reflex, which occurs when your stomach sends signals to your colon to start contracting to make way for incoming food. It’s also influenced by our circadian rhythms, which directly regulate gut motility.

How to Do It

“Changing a [poop] schedule means working with your biology,” Malieckal explains. This can be done in a few different ways.

Bowel Retraining Practice

This evidence-based practice is exactly what it sounds like. “You can rebuild a conditioned reflex that has either never been established or has been disrupted over time,” says Jonathan Birch, N.M.D., RMSK.

According to Malieckal and Birch, bowel retraining leverages the connection between the gastrocolic reflex and circadian high-amplitude propagating contractions (HAPCs)—the muscular waves responsible for moving stool through the colon and toward the rectum. These contractions peak immediately upon waking and after a morning meal.

Bowel retraining works by eating all meals at consistent, structured times each day, and then sitting on the toilet for 15 to 30 minutes immediately following one or each of those meals (typically breakfast). This allows you to capitalize on the two peak windows of colonic activity, Malieckal explains. “The goal is to present the body with the same stimulus, at the same time, every day, until a conditioned response becomes habitual.”

“You are not necessarily trying to force a result; you are simply presenting the opportunity at a consistent time until the body begins to anticipate and respond to it,” says Birch. He notes that in his practice, it typically takes about two to four weeks of daily practice for his patients to start noticing a shift. “I recommend putting your phone away, feet elevated on a small stool to approximate a squat and practice abdominal breathing to massage your intestines,” he adds.

When it comes to bowel retraining practices, Malieckal and Birch emphasize that consistency is key. “Do not skip days or abandon the practice after a week, as you can reset the conditioning. Treat it like brushing your teeth to establish this new habit so you can achieve lasting results,” says Birch.

Caffeinated Coffee in the Morning

While coffee is popular as the perfect morning pick-me-up, an added perk of drinking caffeinated coffee is it can help get things moving in the morning.

“Research has shown that caffeine acts as a direct stimulant to the digestive tract, inducing contractions in the sigmoid colon and rectum that closely mimic the gastrocolic response,” Malieckal explains. “For those who tolerate it, a morning cup of coffee consumed shortly after waking can serve as an additional physiological nudge.”

If you’d like your poop schedule to change from the afternoon to the morning (or vice versa), a cup of coffee with any meal may help make this happen. However, if you’re aiming for an afternoon bowel movement and are considering leaning into coffee, be mindful that extra caffeine later in the day may impact your sleep schedule.

Magnesium at Night

“Magnesium is one of the most reliable tools for nudging your bowel movement timing because the dose and timing of supplementation directly influences when things move,” explains Birch.

He advises taking a magnesium supplement (such as magnesium citrate or oxide) in the evening at a dose starting around 300 milligrams with a full glass of water before bed to help stimulate a bowel movement the next morning. In some cases, a higher dose may be recommended under the advisement of your health care provider.

If magnesium citrate or oxide is too laxative, Birch advises switching to magnesium glycinate for a gentler movement with less urgency. “The key is starting low and titrating slowly—too much too fast causes loose stools, which can disrupt the schedule rather than establish one.”

Other Tips to Help You Go

• Add Fiber Gradually. Fiber is essential for healthy bowel regularity, yet 95% of Americans aren’t meeting daily recommendations. “Fiber works more gradually than magnesium, but creates a more durable rhythm because it’s feeding and structuring the microbiome that drives motility,” explains Birch. He recommends prioritizing soluble fiber to help bulk up and soften stool.
• Consider Psyllium Fiber. Malieckal points out that psyllium, a functional food source of soluble fiber, has the highest efficacy for supporting regularity compared to other types of soluble fiber supplements. Birch recommends taking soluble fiber at the same time each day—ideally in the morning or in divided doses, as needed—and slowly working toward 5 to 10 grams of supplemental soluble fiber per day, alongside a diverse fiber-rich diet.
• Stay Hydrated. Fluids and fiber need to go hand-in-hand, especially as you increase fiber in your diet. “You must properly hydrate when taking extra soluble fiber, or it may actually slow things down and worsen constipation rather than improve it,” Birch explains.
• Get Moving. “Physical activity has been associated with a reduced constipation risk,” says Malieckal. The latest research indicates that about 20 to 30 minutes of moderate exercise (such as walking) most days, or about 150 minutes of moderate aerobic activity per week, can go a long way in improving regularity.
• Manage Stress. “Chronic stress keeps the body in sympathetic dominance, also known as the fight-or-flight state,” says Birch. Stress is especially problematic for those prone to constipation because it suppresses your “rest and digest” branch of the nervous system. Birch recommends engaging in simple daily practices such as five to 10 minutes of slow diaphragmatic breathing, gentle movement and herbal tea to help your body relax, which is needed for bowel movements.
• Get Enough Sleep. Birch advises reducing evening screen time and maintaining a consistent sleep schedule to help further optimize the gut-brain signaling processes that govern your poop schedule and gut motility.

Our Expert Take

Changing your poop schedule is possible—it just takes consistency and a little strategy.

Experts say the most effective way to change your poop schedule is to practice bowel retraining, while maintaining consistent, structured mealtimes. A cup of coffee with your morning meal paired with magnesium at night can also make great allies for stimulating a morning movement.

The key is sticking with it. While it may take a few weeks to notice a shift, these small, repeatable habits can help train your body to go when it works best for you.