A study led by Monash University examined the impact of fibre on blood pressure and reducing cardiovascular disease (CVD) risk.
Meta-analyses show that higher intake of dietary fibre is associated with a significant reduction in systolic and diastolic blood pressure, independent of pharmacological interventions.
The study authors say the international review sheds light on the often-overlooked importance of dietary fibre in managing high blood pressure, also called hypertension.
“Despite numerous guidelines recommending lifestyle modifications as first-line treatment for hypertension, specific recommendations regarding fibre intake have been notably absent,” said lead study author Associate Professor Francine Marques from the Monash University School of Biological Sciences.
“Dietary fibre has emerged as a crucial yet underappreciated part of hypertension management.
“Our comprehensive analysis emphasises the evidence supporting the effectiveness of dietary fibre in lowering blood pressure and reducing the risk of cardiovascular events.”
Hypertension remains a global health concern, contributing to 19 per cent of deaths worldwide.
Study authors say the findings of the review, published in Hypertension, have significant implications for public health initiatives and future hypertension guidelines.
They say healthcare professionals can take proactive steps to address hypertension and promote cardiovascular health by recognising the vital role of dietary fibre.
The review also provides resources for medical teams and patients on what foods to prioritise to increase fibre intake and reach their recommendations.
“Our study highlights the urgent need for healthcare providers to prioritise dietary fibre as vital for hypertension management,” Associate Professor Marques said.
“By incorporating dietary fibre into treatment plans and empowering patients to increase their intake, we can significantly reduce the burden of hypertension and improve cardiovascular outcomes.”
The review outlines a number of findings, including:
The Impact of Fibre on Blood Pressure: Meta-analyses have shown that higher intake of dietary fibre is associated with a significant reduction in systolic and diastolic blood pressure, independent of pharmacological interventions. Each additional 5 grams of fibre per day is estimated to reduce systolic blood pressure by 2.8 mmHg and diastolic blood pressure by 2.1 mmHg.
Gut Microbiota: Dietary fibre promotes cardiovascular health through various mechanisms, including modulation of gut microbiota and the production of short-chain fatty acids (SCFAs). These SCFAs produce anti-inflammatory effects and regulate immune function, contributing to reduced blood pressure.
Challenges and Recommendations: Despite the clear benefits of dietary fibre, global intake remains insufficient, with the average consumption hovering around 11 grams per day. The review provides evidence-based recommendations, suggesting a minimum daily intake of >28g/day for women and >38g/day for men to effectively manage hypertension.