The Claim

The oral microbiome of healthy older adults exhibits a distinct response to dietary nitrate compared to that of healthy young adults, characterized by a significant reduction in Prevotella intermedia, Prevotella dentalis, and Crassaminicella sp. SY095, which correlate strongly with increased plasma nitrite concentrations and reduced blood pressure, indicating age-dependent modulation of the nitrate-nitrite-nitric oxide pathway.

Source: Ageing modifies the oral microbiome, nitric oxide bioavailability and vascular responses to dietary nitrate supplementation.

What the research says

Supports is higher

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Supports
76score
Challenges
0score

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How it works
1 study reviewed
In plain English

In healthy older adults, dietary nitrate leads to a measurable decrease in specific oral bacteria that produce ammonia and a corresponding increase in plasma nitrite and lower blood pressure, compared to healthy young adults.

See the scientific wording

The oral microbiome of healthy older adults responds differently to dietary nitrate than that of young adults, with a significant reduction in Prevotella intermedia, Prevotella dentalis, and Crassaminicella sp. SY095—bacteria encoding ammonia-producing nitrate reductase pathways—that correlates strongly with increased plasma nitrite and reduced blood pressure, suggesting age-dependent modulation of the nitrate-nitrite-nitric oxide pathway.

Why this might work

When older adults eat nitrate-rich foods, specific bacteria in their mouth that turn nitrate into ammonia decrease in number. This allows other bacteria to convert more nitrate into nitrite, which enters the bloodstream and becomes nitric oxide. Nitric oxide relaxes blood vessels, which lowers blood pressure. Younger adults do not show this change because their oral bacteria respond differently.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Ageing modifies the oral microbiome, nitric oxide bioavailability and vascular responses to dietary nitrate supplementation.

    In older adults, drinking beetroot juice lowers blood pressure because it reduces certain mouth bacteria that waste nitrate into ammonia, letting more nitrate turn into helpful nitrite that relaxes blood vessels. This doesn’t happen the same way in younger people.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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