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The first-ever evidence-based dietary guidance for adults experiencing chronic constipation has just been released, and you might be surprised by some of the recommendations. Advice like eating a generally high-fiber diet has been found to be lacking in evidence, but an unlikely star has emerged as something of a gut health hero: the humble kiwi fruit.

Most of us will have experienced occasional constipation, but long-term or chronic constipation is also a common issue. Reports vary massively – between 1 and 80 percent according to one study – but the global prevalence in adults is thought to be somewhere around 16 percent, and even more for older people.

“Chronic constipation can hav

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