New Guidelines Say Eating Kiwi Fruit Can Relieve Constipation, Backed by Strong Evidence
Doctors are being advised to recommend kiwi fruit as a first-line dietary remedy for constipation, according to new clinical guidance developed by researchers at King’s College London. The recommendations, grounded in the latest scientific evidence, suggest that simple dietary changes like eating 2–3 kiwis per day may be more effective than simply adding fiber or trying over-the-counter remedies.
The guidance, published in the Journal of Human Nutrition & Dietetics, marks a significant shift in how chronic constipation is managed—favoring natural food-based interventions before turning to supplements or fiber-heavy diets.
“Even without the skin, kiwis are beneficial,” said Dr. Eirini Dimidi, the lead study author and a reader in nutritional sciences at King’s College London. “They help increase stool volume, water content, and stimulate bowel contractions, which makes passing stools easier.”
💡 Constipation: A Common Yet Often Misunderstood Issue
According to the NHS, you’re considered constipated if you haven’t had a bowel movement at least three times in the last week, or if you’re going significantly less often than usual. But the symptoms don’t stop there.
“People can report up to 30 different symptoms of constipation,” Dr. Dimidi added. These range from bloating and lower abdominal pain to the sensation of incomplete emptying and even fatigue.
Up to 1 in 10 people experience constipation that doesn’t resolve easily, which can significantly affect their quality of life. For this reason, the new guidelines aim to give both health professionals and patients a better toolkit to manage the condition effectively and naturally.
🥝 Kiwis, Prunes, and Rye Bread Over Fiber Powders
While conventional advice has long centered on increasing fiber and water intake, this new approach highlights specific foods and minerals that can directly improve digestive function.
Top dietary tips from the guidance:
- Eat 2–3 kiwis daily: With or without skin, kiwi contains soluble and insoluble fiber that boosts stool volume and water content.
- Snack on 8–10 prunes a day: Rich in sorbitol and fiber, prunes have a well-documented laxative effect.
- Include rye bread: Whole grains like rye can further improve bowel regularity.
- Drink mineral water instead of tap water: Particularly types rich in magnesium, which has a natural laxative effect.
Dr. Dimidi emphasized that mineral-rich water, especially brands sourced in Eastern Europe, may offer better results than typical UK bottled or tap water.
💊 Magnesium Oxide Supplements Also Effective
In addition to fruit, the researchers found that magnesium oxide supplements were one of the most consistently effective treatments. These supplements helped reduce bloating, straining, abdominal discomfort, and made bowel movements easier overall.
“Magnesium works by drawing water into the gut, which softens stools and helps with bowel contractions,” explained Dr. Dimidi.
🧫 Probiotics: Some Promise, But Limited Evidence
While probiotics are heavily marketed as digestive aids, the guidelines note that the scientific evidence is mixed. Certain strains may improve symptoms, but overall, the research is too inconsistent to make broad recommendations.
Consumers are advised to focus on proven dietary interventions like kiwi fruit, prunes, and magnesium rather than relying solely on probiotic products.
📚 Evidence-Based and Doctor-Approved
The new guidelines are based on a review of 75 clinical trials and were produced in collaboration with the British Dietetic Association, which also funded the project.
“This marks a promising step towards empowering health professionals and their patients to manage constipation through diet,” said Prof. Kevin Whelan, senior research author and professor of dietetics at King’s College London.
The guidelines are being praised as an “excellent resource” for doctors, dietitians, and nurses, offering up-to-date, food-first solutions that could improve patients’ wellbeing and reduce the reliance on pharmaceutical treatments.
🧾 Bottom Line
If you’re struggling with constipation, it may be time to reach for a kiwi rather than another fiber supplement. With robust evidence behind it, this small fruit could offer big relief.
Always consult a doctor or registered dietitian before starting new supplements or significantly changing your diet.
