Research
Mixed
Increasing dietary fiber intake significantly reduces systolic and diastolic blood pressure in adults with hypertension, regardless of concurrent antihypertensive medication use.
If you have high blood pressure, increasing your daily fiber intake by about 6-12 grams (e.g., adding more beans, oats, or vegetables) can significantly lower your blood pressure. This benefit holds true even if you are already taking blood pressure medication, making it a powerful addition to your current treatment plan.
StrongSupportsHIGH confidence
High certainty evidence from trials of adults with hypertension indicates increasing fibre intakes reduces systolic (MD 4.3 mmHg (95% CI 2.2 to 5.8)) and diastolic blood pressure (MD 3.1 mmHg (95% CI 1.7 to 4.4)). Benefits were observed irrespective of cardioprotective drug use.
Why this rating
The paper assigns 'High' certainty to blood pressure outcomes using GRADE protocols.
Source
Dietary fibre in hypertension and cardiovascular disease management: systematic review and meta-analyses
Andrew Reynolds et al. · BMC Medicine · 2022
DOI 10.1186/s12916-022-02328-x
Meta-analysis · 15 studiesCited 171×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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