Overview
- The University of Exeter trial found that seniors consuming nitrate-rich beetroot juice for two weeks experienced significant drops in 24-hour systolic and diastolic blood pressure compared to a nitrate-stripped placebo.
- Gene sequencing of mouth swabs revealed that older adults showed marked declines in inflammatory Prevotella and increases in beneficial nitrate-metabolizing Neisseria after juice intake.
- The study confirms that oral bacteria convert dietary nitrates into nitric oxide, a vasodilator that widens arteries and lowers blood pressure more effectively in older adults.
- Earlier meta-analyses from 2017 and 2022 established consistent blood pressure reductions with daily beetroot juice, with the largest effect seen at 250 mL doses.
- Researchers recommend larger, nuanced trials to examine demographic and lifestyle influences on nitrate response and to test other nitrate-rich vegetables like spinach and celery.