Very few fruits directly cause constipation. Most fruits are rich in fiber and water, which help keep things moving. But a handful of fruits can slow your digestion under specific circumstances, and certain eating patterns around fruit can work against you. The two biggest culprits are unripe bananas and persimmons, both of which contain compounds that tighten intestinal tissue and draw moisture out of stool.
Unripe Bananas Are the Main Offender
The ripeness of a banana completely changes what it does in your gut. Green, unripe bananas contain the highest concentration of resistant starch of any unprocessed food, with green banana flour clocking in at roughly 74% resistant starch by weight. They also contain tannins, astringent compounds that slow intestinal movement and increase water reabsorption in the colon. The combination means drier, harder stool that moves through you more slowly.
Here’s the twist: as bananas ripen, their resistant starch converts into regular sugars. A spotted yellow banana has far less resistant starch and significantly lower tannin levels than a green one. Ripe bananas actually contain pectin, a type of soluble fiber that shortens colon transit time, feeds beneficial gut bacteria, and helps relieve constipation. So the same fruit can either bind you up or help you go, depending on when you eat it. If you’re prone to constipation, choose bananas with brown spots over firm green ones.
Persimmons and Tannin Buildup
Persimmons, particularly the astringent Hachiya variety eaten before fully ripe, are one of the few fruits strongly linked to constipation and even intestinal blockages. They contain a tannin called shibuol that reacts with stomach acid to form a gummy, hardened mass. When this mass combines with plant fibers in the gut, it can develop into a phytobezoar, a solid lump that physically blocks the digestive tract. This risk increases with age (over 70% of phytobezoar cases occur in people over 30) and is higher in people with slower gastric emptying from conditions like diabetes or previous abdominal surgery.
Fully ripe, soft persimmons have much lower tannin levels and are generally safe. The sweet Fuyu variety, which is eaten while still firm, also carries less risk than unripe Hachiya persimmons. If you enjoy persimmons, waiting until they’re completely soft and jelly-like inside is the simplest way to avoid problems.
How High-Fructose Fruits Cause Trouble
Some fruits don’t cause constipation for everyone but reliably do so in people who poorly absorb fructose. When fructose isn’t fully absorbed in the small intestine, it ferments in the colon, producing gas, bloating, and abdominal pain. While this more commonly causes diarrhea, in people with irritable bowel syndrome it can also trigger constipation or an unpredictable mix of both.
Fruits with a higher ratio of fructose to glucose are the most likely triggers. These include apples, pears, mangoes, watermelon, honeydew melon, guava, star fruit, and papaya. In one study of IBS patients with confirmed fructose malabsorption, 74% saw improvement in all abdominal symptoms after cutting these high-fructose foods from their diet. Roughly 40% of healthy people show signs of fructose malabsorption when they consume 20 grams of fructose at once, an amount you could easily get from two or three large apples or pears eaten in a sitting.
If you notice bloating, cramping, or irregular bowel habits after eating these fruits, the fructose content may be the issue rather than the fruit itself. Eating smaller portions, pairing fruit with other foods, or choosing lower-fructose options like berries, oranges, or kiwi can help.
Low Fiber Intake Matters More Than Any Single Fruit
For most people, constipation isn’t caused by eating the wrong fruit. It’s caused by not eating enough fiber overall. The U.S. Dietary Guidelines recommend 25 to 28 grams of fiber daily for women and 28 to 34 grams for men, depending on age. Over 90% of women and 97% of men fall short of these targets.
Fiber works in two ways. Insoluble fiber adds bulk to stool and physically pushes material through the digestive tract. Soluble fiber dissolves in water to form a gel that softens stool and makes it easier to pass. Most fruits contain both types. Apples, bananas, avocados, and citrus fruits are particularly rich in soluble fiber, while the skins and seeds of fruits like berries and pears contribute insoluble fiber. Pectin, a soluble fiber found in apples, prunes, kiwi, bananas, and dates, has been shown to speed up colon transit time, boost populations of beneficial gut bacteria, and ease constipation symptoms.
Replacing whole fruit with fruit juice is one of the fastest ways to cut your fiber intake without realizing it. Processing fruit into juice strips out most of its fiber and breaks down its cell structure, converting the naturally bound sugars into free sugars. If you’re relying on juice for your fruit servings, you’re getting far less of the fiber that prevents constipation in the first place.
Cooking Fruit Changes Its Fiber
How you prepare fruit also affects digestion. Cooking breaks down insoluble fiber, the type that adds bulk and speeds up transit. For people with sensitive digestive systems or conditions like inflammatory bowel disease, cooked fruit can be easier to tolerate. But for someone trying to prevent constipation, raw fruit with its full fiber structure intact is generally more effective at keeping stool moving. Stewing apples or baking pears softens the fiber and may reduce their laxative benefit compared to eating them raw with the skin on.
Fruits That Help, Not Hurt
If constipation is your concern, certain fruits are reliably helpful. Prunes are the best-studied option, containing both sorbitol (a natural sugar alcohol with laxative effects) and high levels of fiber. Kiwifruit has strong evidence for improving stool frequency and consistency. Oranges, berries, and ripe bananas all contribute meaningful fiber without the tannin issues of green bananas or persimmons.
The bottom line: the list of fruits that cause constipation is short. Unripe bananas and unripe persimmons are the clearest examples. High-fructose fruits can cause digestive problems in susceptible people. Beyond those specific cases, eating more fruit, not less, is one of the simplest ways to stay regular.