Researchers at King's College London have identified kiwifruit, rye bread, and mineral-rich water as beneficial for reducing symptoms of chronic constipation. Their study marks the first comprehensive evidence-based dietary recommendations tailored specifically for adults suffering from long-term constipation. Additionally, the research found that supplements like psyllium fiber, certain probiotics, and magnesium oxide may offer further relief.

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The guidelines challenge the effectiveness of widely suggested remedies, such as general high-fiber diets and senna supplements, which lack strong scientific backing. Published in the Journal of Human Nutrition & Dietetics and Neurogastroenterology & Motility, the new recommendations have received endorsement from the British Dietetic Association (BDA) and aim to enhance clinical management of constipation by equipping healthcare professionals with evidence-based dietary tools.

Chronic constipation significantly impacts quality of life and contributes to rising healthcare costs. Previous advice typically focused on increasing fiber and fluid intake, an approach deemed overly simplistic by the researchers.

The recommendations rely on extensive systematic reviews and meta-analyses, evaluated through the GRADE framework. An expert panel comprising dietitians, a nutritionist, a gastroenterologist, a gut physiologist, and a general practitioner assessed data from over 75 clinical trials, resulting in 59 key recommendations and the identification of 12 priority areas for future research.

Dr. Eirini Dimidi, Reader in Nutritional Sciences at King's College London and the lead author, emphasized the significant daily impact of chronic constipation. She stated that for the first time, dietary approaches that genuinely assist in management have been identified, moving away from unsupported advice. The guidelines allow individuals to better manage their symptoms through diet and hydration.

Additionally, the guidelines focus on measurable outcomes including stool frequency, consistency, straining, and overall quality of life, allowing healthcare professionals to offer tailored dietary advice. A clinician-friendly tool has also been developed to assist global implementation.

Despite the effectiveness of several identified foods and supplements, the quality of existing studies remains low, often concentrating on individual interventions rather than comprehensive dietary patterns. This highlights the necessity for more robust research in constipation management.

Dr. Dimidi remarked that high-fiber diets, although widely recommended, showed limited evidence specific to constipation relief. She acknowledged the overall health benefits of fiber but stressed the need for updated dietary strategies based on emerging evidence.

Professor Kevin Whelan, the senior author and Professor of Dietetics, noted that these guidelines empower both health professionals and patients in managing constipation through diet. He expressed hope that continued research will lead to lasting improvements in patient well-being.