When you’re dealing with bloating and constipation at the same time, the right foods can relieve both, but the wrong choices can make one problem worse while fixing the other. The key is choosing foods that move things along without producing excess gas. That means prioritizing gentle, low-gas fiber sources, staying well hydrated, and including a few specific foods with proven gut-moving properties.
Best Foods to Reach for First
A few foods stand out for their ability to relieve constipation without piling on more bloating. Prunes are the classic recommendation for good reason. They contain sorbitol, a natural sugar alcohol that draws water into the intestines and softens stool. About 12 prunes (roughly 50 grams) twice a day with meals is the amount used in clinical research comparing prunes to fiber supplements, and prunes performed well. Even without their fiber content, the sorbitol alone acts as a mild osmotic laxative.
Kiwifruit is another strong option. Green kiwis contain a natural enzyme that helps break down protein in the digestive tract and gently stimulates gut motility. A study in older adults found that eating kiwifruit daily for three weeks significantly increased the number of bowel movements, stool volume, and comfort during defecation. A practical starting point is one to two kiwis per day.
Oats are one of the best breakfast choices when you’re bloated and backed up. A half cup of rolled oats provides about 5 grams of fiber, and oats are classified as low-FODMAP, meaning they’re less likely to cause gas. Chia seeds are another powerhouse: just two tablespoons deliver 8 grams of fiber. Stir them into water, yogurt, or oatmeal and let them form a gel, which helps bulk up stool and move it through smoothly.
Fiber That Helps Without Making Bloating Worse
Not all fiber is equal when bloating is part of the picture. Insoluble fiber, found in whole wheat, wheat bran, nuts, and many vegetables, adds bulk to stool and helps push material through the digestive system. Soluble fiber, found in oats, apples, carrots, and psyllium, dissolves in water and forms a gel that softens stool. You need both types, but the source matters more than the category when bloating is a concern.
The problem is that many high-fiber foods are also high-gas foods. Beans, lentils, cabbage, Brussels sprouts, and cauliflower are all excellent fiber sources, but they’re also among the most common gas producers. When you’re already bloated, loading up on these can make your abdomen feel worse even as your constipation starts to resolve.
Instead, focus on fiber sources that are gentler on gas production. These low-FODMAP options provide solid fiber without the bloat:
- Carrots: 3 grams of fiber per medium carrot
- Green beans: 2 grams per 15-bean serving
- Unripe bananas: 2 grams per medium banana
- Broccoli (small portions): 3 grams per three-quarter cup raw
- Quinoa: 3 grams per cup cooked
- Chia seeds: 8 grams per two tablespoons
- Rolled oats: 5 grams per half cup
Most adults fall short of their daily fiber needs. Current U.S. dietary guidelines recommend 22 to 28 grams per day for women and 28 to 34 grams per day for men, depending on age. If your current intake is low, increase it gradually over a week or two rather than doubling it overnight. A sudden jump in fiber is one of the most common reasons people get more bloated when trying to fix constipation.
Why Water Matters as Much as Food
Fiber without adequate water can actually make constipation worse. Fiber absorbs water to do its job. Without enough fluid, it just sits in the gut and creates more bulk with nowhere to go. Clinical trials investigating fiber for constipation typically pair fiber supplements with about 2 liters of water per day to ensure the fiber works as intended. If you’re increasing your fiber intake and not seeing results, insufficient water is often the missing piece.
You don’t need to force-drink water on a rigid schedule. Just keep a bottle nearby and sip consistently through the day. Herbal teas, broth, and water-rich foods like cucumbers and oranges all contribute to your total fluid intake.
Magnesium-Rich Foods for Gut Motility
Magnesium plays an underappreciated role in constipation relief. It helps increase the amount of water in your intestines, which softens stool and supports the muscle contractions that move food through the digestive tract. Many people with chronic constipation have low magnesium intake without realizing it.
Good food sources include spinach and other dark leafy greens, almonds, cashews, pumpkin seeds, and whole grain products. A handful of almonds or pumpkin seeds as a snack, or a side of sautéed spinach with dinner, adds both magnesium and fiber to your day without contributing much to bloating.
Fermented Foods for Gut Transit
Fermented foods can help speed up the time it takes for food to travel through your digestive system. Research on fermented milk products has shown that specific probiotic strains can shorten gut transit time, reduce the frequency of hard or lumpy stools, and improve symptoms in people with functional constipation. Yogurt, kefir, and fermented milk drinks are the most well-studied options.
Kimchi and sauerkraut are other fermented options, but start with small amounts if you’re bloated. Fermented vegetables contain fiber and can produce gas in larger servings. A few tablespoons alongside a meal is a reasonable starting point.
Foods to Limit Until You Feel Better
While you’re working through a constipation-and-bloating episode, some foods are worth pulling back on temporarily. Beans and lentils, cabbage, Brussels sprouts, bok choy, and cauliflower are well-documented gas producers. They’re nutritious foods you can reintroduce later, but in the short term they tend to make bloating significantly worse.
Carbonated drinks add gas directly to your digestive tract. Fried and fatty foods slow stomach emptying, which can intensify that heavy, bloated feeling. Highly processed foods like white bread, fast food, and packaged snacks are typically low in fiber and can worsen constipation. Sugar-free candies and gums sweetened with sugar alcohols (like sorbitol or xylitol) can cause gas and cramping in some people, even though sorbitol in whole foods like prunes tends to be better tolerated because it comes packaged with fiber.
A Simple Day of Eating
Putting this together into an actual day might look like: oatmeal with chia seeds and a sliced unripe banana for breakfast, a quinoa bowl with carrots, green beans, and a drizzle of olive oil for lunch, a kiwi and a small handful of almonds as an afternoon snack, and grilled chicken or fish with sautéed spinach and roasted potatoes for dinner. Add a serving of prunes at some point during the day and sip water consistently.
This combination gives you a mix of soluble and insoluble fiber from low-gas sources, magnesium from the greens and nuts, sorbitol from the prunes, and the natural enzymes in kiwi. It’s a lot more effective than just adding a fiber supplement to your existing diet.
How Quickly to Expect Relief
Dietary changes for constipation aren’t instant. If you shift your eating patterns meaningfully, expect a few weeks before symptoms fully ease. Some people notice improvement within a few days, especially from prunes or kiwi, but the bloating component often takes longer to resolve because your gut microbiome needs time to adjust to changes in fiber intake. Consistency matters more than intensity. A steady daily intake of the right foods will outperform a one-day fiber binge every time.