Prune juice is the most effective juice for constipation, followed by pear juice and apple juice. All three work because they contain sorbitol, a naturally occurring sugar alcohol your body can’t fully absorb. When sorbitol reaches your colon, it pulls water in, softening stool and triggering a bowel movement.
Why Sorbitol Is the Key Ingredient
The juices that relieve constipation share one thing in common: high levels of sorbitol. Unlike regular sugar, sorbitol passes through your small intestine largely unabsorbed. Once it reaches the colon, it draws water into the bowel through osmosis. That extra fluid softens hard, lumpy stool and makes it easier to pass. A 2015 review found that juices containing naturally occurring sorbitol increased both the water content and frequency of bowel movements.
This is why not all fruit juices help with constipation. Orange juice and grape juice, for instance, contain far less sorbitol and won’t have the same laxative effect. If you’re reaching for juice specifically to get things moving, stick with the three that deliver meaningful amounts of sorbitol: prune, pear, and apple.
Prune Juice: The Strongest Option
Prune juice has the highest sorbitol concentration of any common fruit juice, which is why it’s the go-to recommendation. Sorbitol draws water into the colon, softening stool and creating a natural laxative effect. Prune juice also contains fiber and phenolic compounds that may further stimulate the gut. For most adults, half a cup to a full cup (120 to 240 mL) is a reasonable starting amount. Drinking it in the morning on a relatively empty stomach tends to produce results faster.
If you’ve never tried prune juice for constipation before, start on the lower end. It’s potent enough that drinking too much at once can swing you from constipation straight to loose stools.
Pear Juice: A Gentler Alternative
Pear juice is a solid second choice, particularly for children. It contains sorbitol along with a high fructose-to-glucose ratio, which contributes to its mild laxative effect. Fructose that isn’t fully absorbed in the small intestine behaves similarly to sorbitol, pulling water into the bowel. Pear juice tends to be better tolerated than prune juice for people who find the taste or intensity of prune juice off-putting.
Apple Juice: Mild but Effective for Kids
Apple juice provides a very gentle laxative effect. It’s often recommended for children because of its relatively high ratio of fructose to glucose and its sorbitol content. The effect is milder than prune or pear juice, so it works best for mild constipation or as a preventive measure rather than a remedy for severe backup.
One important distinction: apple juice helps constipation, but applesauce does the opposite. Applesauce contains higher levels of pectin, a fiber that adds bulk to stool and firms it up. That makes applesauce better suited for diarrhea, not constipation. If you’re blending whole apples at home, you’re getting pectin along with the sorbitol, which can cancel out the laxative benefit.
What About Orange Juice?
Orange juice isn’t typically recommended for constipation because it’s low in sorbitol. However, citrus fruits contain a flavonoid called naringenin that has shown laxative properties in animal research. In a study published in PLOS ONE, naringenin stimulated chloride secretion in colon tissue, which creates an osmotic force that pulls fluid into the bowel. In constipated rats, it restored normal fecal output, water content, and mucus secretion. That said, the concentrations used in lab studies are much higher than what you’d get from a glass of orange juice, so it’s not a reliable remedy on its own.
Juice for Babies and Toddlers
For infants over one month old who are exclusively breastfed or formula-fed, small amounts of fruit juice can help with constipation. HealthyChildren.org, the parent resource from the American Academy of Pediatrics, recommends 1 ounce (30 mL) per month of age per day, up to a maximum of 4 ounces (120 mL). Pear and apple juice are the preferred choices for younger infants. After three months of age, prune juice can also be used.
These guidelines apply specifically to treating constipation, not as a daily beverage. Juice isn’t recommended as a regular part of an infant’s diet because of its sugar content and lack of fiber.
How Much to Drink and What to Expect
For adults, 4 to 8 ounces (120 to 240 mL) of prune juice is a typical starting dose. You can drink it once or twice a day. Pear and apple juice can be consumed in slightly larger amounts since they’re less potent, but there’s no benefit to drinking excessive quantities. Results vary from person to person. Some people notice a bowel movement within a few hours, while others may need a day or two of consistent intake before things start moving.
Drinking juice on an empty stomach, particularly first thing in the morning, tends to speed up the effect. Warm prune juice is a common home remedy variation, though the temperature itself doesn’t change the sorbitol content. Staying hydrated with water alongside juice helps, since the whole mechanism depends on drawing fluid into the colon.
Side Effects to Watch For
Because these juices contain large amounts of carbohydrates and sorbitol, drinking too much can cause diarrhea, abdominal pain, bloating, and gas. This is especially true with prune juice. The International Foundation for Gastrointestinal Disorders notes that excessive fruit juice consumption is a common cause of these symptoms. Start with a small amount, give it time to work, and increase gradually rather than drinking a large glass all at once.
People with irritable bowel syndrome should be particularly cautious, since sorbitol and excess fructose are both FODMAPs, the group of fermentable carbohydrates that can trigger IBS symptoms. If juice consistently causes cramping or bloating without relieving constipation, it may not be the right approach for you.