0
0
A new study from the University of Exeter reveals that drinking nitrate-rich beetroot juice can significantly lower blood pressure in older adults, and that the effect is likely driven by changes in the mouth’s microbial community1.
Study Highlights
-
Largest study of its kind: The research, published in Free Radical Biology and Medicine, involved 39 adults under 30 and 36 adults in their 60s and 70s.
-
Trial design: Participants consumed concentrated beetroot juice shots twice daily for two weeks, followed by a similar period with a placebo juice (nitrate removed). Each phase was separated by a two-week washout period.
-
Key findings:
-
Older adults experienced decreased blood pressure after consuming the nitrate-rich juice.
-
No such effect was observed in the younger group.
-
Nitrate-rich juice altered oral bacteria in both groups, but the changes were more pronounced and beneficial in the older adults.
-
How Beetroot Juice Works
Nitrate is naturally found in vegetables and is crucial for health. The body converts dietary nitrate into nitric oxide, a molecule that helps regulate blood vessel function and blood pressure.
In older adults:
-
Higher blood pressure is common.
-
The natural production of nitric oxide declines with age.
Researchers found that beetroot juice not only delivers high amounts of dietary nitrate but also suppresses potentially harmful oral bacteria and boosts beneficial bacteria such as Neisseria. This shift supports better conversion of nitrate into nitric oxide, thus improving vascular health and lowering blood pressur.
Implications for Diet and Health
Professor Anni Vanhatalo, study author, emphasized the role of nitrate-rich vegetables in promoting cardiovascular health among older individuals. “Encouraging older adults to consume more nitrate-rich vegetables could have significant long-term health benefits,” she noted. For those who dislike beetroot, alternatives such as spinach, arugula, fennel, celery, and kale are suitable options.
Professor Andy Jones, co-author, added, “This study shows 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.”
Future Directions
The findings encourage further research into how lifestyle and biological factors, including sex, may affect individual responses to dietary nitrate. The research underscores the growing evidence supporting nutrition-focused interventions for healthy aging.
Disclaimer
This article is for informational purposes only and does not constitute medical advice. Individuals should consult with healthcare professionals before making significant dietary changes or using supplements, especially for conditions related to blood pressure or cardiovascular health1.
