A new study is adding to growing evidence that what people eat may influence not only their physical health but also the quality of their sleep.
Researchers examining dietary records alongside wearable-based sleep data found that higher fibre intake was associated with better restorative sleep and a lower nighttime heart rate. The findings were published in Nature Health on August 19, 2026.
Fibre is naturally found in foods such as vegetables, fruits, beans, lentils, oats, whole grains, nuts and seeds. Beyond supporting digestion, dietary fibre can influence blood sugar regulation and the gut microbiome, which researchers increasingly believe may play a role in overall health.
The latest findings do not prove that eating more fibre directly causes better sleep. However, they add to a growing body of research linking dietary quality with sleep and metabolic health.
Nutrition experts generally recommend getting fibre from a variety of minimally processed foods rather than relying heavily on supplements. Adding vegetables to lunch and dinner, choosing whole grains instead of refined grains and including beans or lentils in meals can be simple ways to increase intake.
Recent nutrition research is also highlighting the importance of plant-based foods for gut health. Studies have suggested that fibre and certain plant proteins can provide fuel for beneficial gut bacteria and support the production of helpful metabolites.
For people looking to improve their diet, the takeaway is simple: focus on a varied eating pattern built around vegetables, fruits, legumes, whole grains, nuts and seeds. A balanced diet, regular physical activity and consistent sleep habits can work together to support long-term health.
This article is for general information and is not a substitute for personalised medical or nutritional advice.
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