Synopsis

Source of validity: Traditional
Rating (out of 5): 3

Juice, particularly prune juice, has a long history of traditional use for the relief of constipation in adults. Prunes (dried plums) and their juice have been used in folk medicine for centuries as a natural laxative. This effect is attributed primarily to their high content of sorbitol, a sugar alcohol that acts as an osmotic laxative, as well as dietary fiber. Other fruit juices, such as apple and pear juice, also contain sorbitol, though in lower concentrations than prune juice, and have been similarly used, though more commonly in children.

Scientific studies do provide some support for the efficacy of prune juice in treating mild to moderate constipation in adults, with several small randomized controlled trials and observational studies showing that regular consumption can increase stool frequency and improve stool consistency. However, the overall body of evidence is not extensive, and studies often have small sample sizes or methodological limitations. Clinical guidelines sometimes mention prune juice as a dietary option before considering pharmacological laxatives, particularly for mild cases.

In summary, the use of juice—especially prune juice—for constipation in adults is primarily justified by tradition, with moderate scientific support, mostly for prunes or prune juice. The evidence for other types of juice is weaker, with minimal scientific validation beyond their sorbitol content. Juice is generally safe in moderation, but can cause gastrointestinal discomfort or diarrhea if consumed in excess.

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