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By , Executive Editor, Harvard Health Letter

photo of a whole kiwi fruit with half of another leaning against it

October kicks off kiwifruit season, which lasts through May. The tasty green fruit is great in salads, smoothies, and desserts. And it might have an added bonus of helping to ease chronic constipation, according to a small randomized trial. Scientists asked more than 180 adults (some with constipation, some without) in Italy, Japan, and New Zealand to take part in two four-week courses of treatment. In one regimen, they ate two peeled kiwifruits per day. In the other, they took 7.5 grams of psyllium (a natural ingredient found in fiber supplements such as Metamucil or Fiberall) daily. The order of the two regimens was randomly assigned, and participants took a four-week break in between. The results: both treatments seemed to help constipated participants produce more bowel movements and experience less straining and abdominal pain, with kiwi being slightly more effective than psyllium. Scientists say kiwi contains not only fiber (about 3 grams per half-cup serving), but also raphides (natural needle-shaped crystals), which both help improve bowel function. The findings were published in the June 2023 issue of The American Journal of Gastroenterology.

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About the Author

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Heidi Godman, Executive Editor, Harvard Health Letter

Heidi Godman is the executive editor of the Harvard Health Letter. Before coming to the Health Letter, she was an award-winning television news anchor and medical reporter for 25 years. Heidi was named a journalism fellow … See Full Bio
View all posts by Heidi Godman

About the Reviewer

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Anthony L. Komaroff, MD, Editor in Chief, Harvard Health Letter

Dr. Anthony L. Komaroff is the Steven P. Simcox/Patrick A. Clifford/James H. Higby Professor of Medicine at Harvard Medical School, senior physician at Brigham and Women’s Hospital in Boston, and editor in chief of the Harvard … See Full Bio
View all posts by Anthony L. Komaroff, MD

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