The Best Time to Eat High-Fiber Foods to Poop the Next Morning

A little help from fiber can get things moving smoothly.

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

Key Points

• Spread fiber intake evenly throughout the day for better morning bowel movements.
• Aim for at least 5 grams of fiber per meal and snack along with plenty of water.
• Stay active, eat prunes or kiwis and allow time in the morning to move things along.

Ever find yourself sitting on the toilet trying to poop but nothing comes out? You’re definitely not alone. Constipation is one of the most common gastrointestinal complaints, accounting for millions of doctors visits each year. “Constipation is more common than most people realize, affecting about 35 million Americans, or roughly 1 in 10,” shares Yasi Ansari, MS, RDN, CSSD.

When you’re backed up, it can be tempting to try quick fixes. But experts agree one of the most effective and sustainable solutions is surprisingly simple: eat more high-fiber foods. A high-fiber diet is one of the best natural ways to improve regularity, since fiber helps stool move through the digestive system, Ansari explains.

So, is there a “best” time to eat high-fiber foods to help you poop the next morning? We spoke with dietitians to get their thoughts and gathered their tips for keeping things moving when your trips to the toilet don’t quite result in a successful flush.

Is There a Best Time?

According to dietitians, the best time to eat high-fiber foods to help you poop the next morning is: multiple times per day.

“To help you poop best in the morning you’ll want to make sure you’re eating enough fiber throughout the day. Consistent fiber helps minimize any gut upset and keeps things consistent, which is what your gut loves,” explains Amanda Sauceda, MS, RD.

The key word here is: consistent. “Consistent fiber intake matters far more than the exact timing of any one meal,” Ansari adds.

Fiber works best when it’s spread out evenly throughout the day, rather than loading up all at once. “The trick is to not jump into a high-fiber diet right away, as that can make things worse. Your gut needs time to get used to more fiber, so add it in slowly to help with the constipation,” Sauceda advises.

Eating too much fiber at once can backfire and actually worsen constipation—especially without drinking enough fluids. Fiber absorbs water in the intestines, and without adequate hydration, it can slow things down instead of speeding them up. “Fiber works best when paired with fluids, so drinking enough water helps keep stool softer and easier to pass, especially as fiber intake increases,” says Ansari.

How Much Fiber Should I Eat?

So how much fiber should you aim for? Ansari recommends aiming for at least 5 grams of fiber at each meal and snack, along with plenty of fluids. This will help you reach the daily recommended intake for fiber, which is 28 grams per day for women and 34 grams per day for men.

Eating fiber-rich foods also help support a healthy gut microbiome. Research shows that an unbalanced gut microbiome can disrupt gut secretions, interfere with normal gut metabolism and even affect gut-brain signaling—all of which can slow digestion and contribute to constipation.

While consistency matters most, timing can also work in your favor. “Eating a fiber-rich dinner (especially paired with hydration) can support a bowel movement the next morning,” says Ansari. She explains that the digestive system follows natural circadian rhythms—your body’s 24-hour clock—and that your colon is actually most active in the morning. Eating fiber at dinner gives it time to move through the gut overnight, potentially supporting a bowel movement by morning.

Another factor to consider is the gastrocolic reflex. “The gastrocolic reflex is what gives you the urge to go to the bathroom because your gut is making space and this reflex is activated when you eat,” explains Sauceda. “Since this reflex kicks in most after meals, starting the day with fiber can be especially helpful.” So don’t skip breakfast—eating in the morning can help move things along too.

Other Tips to Help You Poop

• Drink Water. Staying hydrated can keep stool soft and easy to pass and prevent against constipation.
• Move Your Body. Physical activity supports gut motility, and research suggests that moderately active people have a significantly lower risk of constipation, says Ansari. Going for a morning walk can help stimulate regular bowel movements.
• Set Aside Some Time. Give yourself enough time to poop in the morning. Rushing around in the morning can increase stress, making it harder to “go,” advises Sauceda.
• Eat Prunes. Prunes not only contain fiber but have a laxative-like effect and can help stimulate a bowel movement. Enjoy a few prunes at snack time along with nuts or sprinkle them on a salad, yogurt or grain bowl for a burst of sweetness.
• Eat Two Kiwis a Day. Eating two kiwis a day has been found to be helpful for constipation, says Sauceda. These juicy fruits can help make stool softer and easier to pass.

Our Expert Take

Dietitians agree: There isn’t a single “best” time to eat high-fiber foods for a morning bowel movement. What matters most is spreading your fiber intake evenly throughout the day. Incorporating high-fiber foods consistently into meals and snacks makes a bigger difference than loading up all at once. Aim for at least 5 grams of fiber per meal and pair it with plenty of water to help keep things moving.

Other tips to support regular bowel movements include staying active, scheduling a regular bathroom routine and incorporating foods like prunes and kiwis. Following these strategies can help you have a successful poop each morning—and that’s a great way to start the day.