Research indicates that beetroot juice, rich in dietary nitrates, may lower blood pressure in older adults by altering oral microbiome composition, according to a recent study.
New findings from researchers at the University of Exeter suggest that drinking beetroot juice, which is high in dietary nitrates, could significantly reduce blood pressure in older adults. The study, published in the journal Free Radical Biology and Medicine, highlights the potential of dietary changes to improve vascular health.
The research involved 39 participants under the age of 30 and 36 individuals in their 60s and 70s. Participants were divided into two groups and underwent two separate two-week phases. One group consumed daily shots of nitrate-rich beetroot juice, while the other group received a placebo version without nitrates. To ensure accurate results, a “wash-out period” was implemented between the phases, allowing participants’ systems to reset.
Researchers employed bacterial gene sequencing techniques to analyze the oral microbiome of participants before and after each treatment. The results revealed that older adults who consumed the nitrate-rich beetroot juice exhibited a decrease in the presence of Prevotella bacteria, which is associated with inflammation, and an increase in beneficial bacteria such as Neisseria.
Dr. Marc Siegel, a senior medical analyst at Fox News, explained that nitrates contribute to lower blood pressure by enhancing blood vessel flexibility, reducing resistance, and decreasing inflammation. Participants who began the study with elevated blood pressure experienced a reduction after consuming beetroot juice, while those in the placebo group did not show any significant changes.
“We know that foods high in dietary nitrates, such as leafy greens, beets, and lettuce, can help lower blood pressure,” Dr. Siegel noted. He elaborated that nitrates are converted to nitric oxide in the body, a crucial molecule for vascular health that promotes blood vessel dilation, thereby reducing blood pressure.
Co-author Andy Jones, a professor at the University of Exeter, emphasized the study’s implications, stating that “nitrate-rich foods alter the oral microbiome in a way that could result in less inflammation, as well as a lowering of blood pressure in older people.” This finding underscores the intricate relationship between diet, microbiome health, and aging.
Lee Beniston, an associate director at the Biotechnology and Biological Sciences Research Council, remarked on the significance of the research. He described it as a valuable example of how bioscience can enhance our understanding of the connections between diet, the microbiome, and healthy aging. “By uncovering how dietary nitrate affects oral bacteria and blood pressure in older adults, the study opens up new opportunities for improving vascular health through nutrition,” Beniston added.
Both Jones and Beniston acknowledged that further research is necessary to fully understand the implications of these findings. Dr. Siegel pointed out that as people age, their levels of bioavailable nitric oxide decrease, suggesting that older adults may benefit more from dietary nitrates. He reiterated the well-established notion that a diet rich in fresh fruits and vegetables can help manage various chronic health conditions.
Individuals with high blood pressure or other medical conditions are advised to consult healthcare professionals before making any significant dietary changes. This precaution is especially important for those who are currently taking medication.
Source: Original article