Better Poops Ahead: These 4 Foods Are Surprisingly Effective, Per 75 Trials

Most of us brush off constipation as a minor inconvenience, something that'll work itself out eventually. But backed-up digestion doesn't just affect your bathroom habits. It can drain your energy, fog your brain, dull your skin, and even weaken your immune response. Your gut isn't isolated; it's connected to nearly every system in your body.

For years, the advice has been vague: "Eat more fiber. Drink more water." While that advice still rings true, a comprehensive new review published after analyzing 75 randomized controlled trials reveals something far more specific—and actionable.

Researchers identified exactly which foods, supplements, and drinks actually improve gut motility and stool consistency. Some findings confirmed what we suspected. Others? Completely upended conventional wisdom.

How researchers finally cut through the noise

The study authors didn’t rely on anecdotes or broad nutritional categories. They conducted four separate systematic reviews and meta-analyses, evaluating dozens of controlled trials that tested everything from whole foods to mineral waters to particular probiotic strains.

In total, they generated 59 evidence-backed recommendations, each graded for both strength and quality of evidence. This means you’re not getting blanket advice; you’re getting targeted, specific, clinically tested strategies.

And crucially, the team distinguished between:

That level of detail matters. Your gut doesn’t respond to foods in broad categories; it responds to the unique compounds inside them.

The most effective foods to keep things moving

Kiwifruit topped the list as one of the most effective whole-food remedies for constipation. Rich in both soluble and insoluble fiber, kiwis also contain actinidin, a natural enzyme that aids digestion. Studies show that eating just two kiwis a day can improve stool frequency and softness. 

Not a fan of kiwis? Our favorite fiber supplement includes green kiwifruit fiber (in addition to guar) promote regularity.

Specific probiotic strains, particularly bifidobacteria, and magnesium oxide both improved stool consistency and ease in the review. These can be particularly helpful for people who struggle with high-fiber foods or experience travel-related sluggishness.

Rye bread has long been a staple, and now science confirms it’s a powerhouse for gut regularity. Clinical trials found that rye’s fermentable fibers feed beneficial gut bacteria and help bulk and soften stool. 

Here's where hydration gets interesting: It's not just about drinking more water; it's about drinking better water. High-mineral varieties, especially those rich in magnesium and sulfates, significantly outperform regular tap or filtered water for improving stool frequency.

What surprisingly didn't make the cut

Some long-standing remedies didn't hold up under rigorous analysis.

In other words, not all “natural” remedies are equally effective, and more is not always better. The key is targeted, evidence-based support that aligns with how your gut actually functions.

The takeaway

Constipation isn’t just inconvenient. It affects how you feel, how you think, and how your entire body functions. But you don’t need intense cleanses, extreme diets, or sketchy “detox” teas to get things moving again.

Try adding a couple of kiwis to your breakfast. Choose rye bread over wheat. Swap your go-to water for a mineral-rich option. Support your microbiome with the right probiotic strain or magnesium form.