The Prevalence and Causes of Constipation
According to health researchers, approximately 20% of people in North America suffer from constipation. Constipation is generally defined as having fewer than three bowel movements per week, often accompanied by hard stools, straining, or a persistent feeling of incomplete relief. Grace Derocha, a registered dietitian, noted that the condition can stem from various underlying causes, including irritable bowel syndrome, hypothyroidism, certain types of diabetes, as well as psychological factors like stress and anxiety. She emphasized that identifying and addressing the specific cause is essential for effective, lasting relief rather than relying on dietary changes alone.
Fiber: The Core Nutrient for Relieving Constipation
Fiber remains the most consistently recommended dietary tool for relieving constipation. According to Johns Hopkins Medicine, fiber adds bulk to stool while also supporting the gut microbiome and helping coordinate the muscle contractions that move food through the intestines, a process known as gut motility.
10 Natural Laxative Foods Recommended by Doctors
- Prunes: Among the most well-studied foods for constipation relief. Beyond containing roughly 2 grams of fiber per ounce, prunes are rich in sorbitol—a sugar alcohol the body does not easily digest—which helps draw water into the intestines and stimulate bowel movements. A review of multiple clinical studies found that prunes consistently helped soften stool, improve its consistency, and increase bowel movement frequency.
- Apples: Contain a specific type of soluble fiber called pectin, known for its laxative effect. A small apple contains about 4 grams of fiber. In one clinical study, participants who took pectin supplements for four weeks saw meaningfully faster movement of waste through the colon, along with an increase in beneficial gut bacteria.
- Leafy greens (such as spinach): Registered dietitian Keri Cording described the combination of fiber and magnesium found in leafy greens as particularly effective, calling magnesium "nature's muscle relaxer" for its role in easing intestinal muscle activity. She recommended incorporating greens through a spinach salad or blending them into a smoothie for easier daily inclusion.
- Artichokes: Offer a less commonly recognized fiber source. Cording noted that artichokes are surprisingly high in a type of soluble fiber called inulin, which can help stimulate digestion while also supporting healthy gut bacteria balance.
- Brussels sprouts: Despite their reputation for causing gas, registered dietitian Bianca Tamburello recommended loading up on high-fiber Brussels sprouts, noting that when seasoned well, they can be an easy way to add meaningful fiber to a meal.
- Kiwifruit: Rich in fiber and the enzyme actinidin, multiple studies have confirmed its ability to accelerate colonic transit time and improve constipation symptoms.
- Legumes (such as black beans, chickpeas): Half a cup of cooked legumes provides 6-8 grams of fiber, along with resistant starch that helps promote bowel motility.
- Flaxseeds: Rich in both soluble and insoluble fiber, providing about 2 grams per tablespoon. Grinding before consumption is recommended for better nutrient absorption and bowel movement promotion.
- Pears: Similar to apples, they are rich in pectin and sorbitol, with high water content that helps soften stools.
- Oat bran: Contains more fiber than regular oats, providing about 4 grams per half cup, effectively increasing stool bulk.
Expert Reminder: Comprehensive Approach Works Better
Experts emphasize that dietary changes should be combined with adequate hydration (at least 1.5-2 liters daily) and regular physical activity. If constipation persists for more than three weeks, or is accompanied by abdominal pain or blood in the stool, seek medical attention promptly to rule out underlying conditions. Everyone's gut responds differently, so it's advisable to gradually increase fiber intake to give your digestive system time to adapt.
Tip: You can use the Xiaoshu Health App to sync bowel movement records, water intake, and exercise data from Apple Health, allowing you to track gut health changes more scientifically and find the best constipation relief plan for yourself.