Study Shows Beetroot Juice Reduces Blood Pressure In Older Adults
Beetroot juice improves blood pressure via oral bacteria changes.
A new study suggests that drinking nitrate-rich beetroot juice may help lower blood pressure in older adults, offering a potential dietary support option for managing one of the most common age-related health concerns. The research, conducted by scientists at the University of Exeter, found that participants in their 60s and 70s experienced a noticeable reduction in blood pressure after consuming beetroot juice for two weeks. The findings point to a possible link between dietary nitrates, oral bacteria, and cardiovascular health.
The study, published in Free Radical Biology, included 75 participants divided into two age groups: 39 individuals under 30 and 36 older adults aged between 60 and 70. Researchers designed a controlled experiment in which participants consumed nitrate-rich beetroot juice twice daily for two weeks, followed by a placebo phase where the nitrate content was removed. A washout period separated the two phases to ensure reliable comparisons of results.
Results showed a clear age-related difference in response. Older adults experienced a measurable drop in blood pressure after consuming the nitrate-rich juice, while younger participants showed little to no significant change. Researchers suggest this may be due to the natural decline in nitric oxide production with age, a compound essential for relaxing and widening blood vessels and maintaining healthy circulation.
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A key finding of the study was the role of the oral microbiome in processing dietary nitrates. Scientists observed that beetroot juice altered the composition of mouth bacteria in older adults, reducing levels of Prevotella while increasing beneficial bacteria such as Neisseria. These bacteria help convert nitrates into nitric oxide, improving the body’s ability to regulate blood pressure more effectively.
Researchers believe this interaction between diet and oral bacteria could explain why older adults benefited more from beetroot juice. As nitric oxide production naturally decreases with age, the additional dietary nitrates may help compensate for this decline. The study highlights how gut and oral microbiomes may play a larger role in cardiovascular health than previously understood.
While the findings are promising, experts caution that beetroot juice should not replace prescribed medication for hypertension. Larger studies are needed to confirm the results and determine long-term benefits. However, researchers note that incorporating nitrate-rich vegetables such as spinach, kale, celery, arugula, and fennel into the diet may offer a simple, natural way to support heart health, particularly for older adults.
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