When you eat foods with natural nitrates, like spinach or beets, bacteria in your mouth turn them into nitrite, which then travels through your blood and becomes nitric oxide—a molecule that helps your blood vessels relax.
Claim Language
Language Strength
definitive
Uses definitive language (causes, prevents, cures)
The claim uses definitive verbs such as 'is reduced' and 'is converted', which imply direct, certain biochemical transformations without uncertainty or probabilistic language.
Context Details
Domain
nutrition
Population
human
Subject
Inorganic dietary nitrate
Action
is reduced to nitrite by commensal oral bacteria and subsequently converted to nitric oxide
Target
nitric oxide in systemic circulation via acidic and enzymatic pathways
Intervention Details
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Evidence from Studies
Supporting (4)
Dietary nitrate provides sustained blood pressure lowering in hypertensive patients: a randomized, phase 2, double-blind, placebo-controlled study.
This study showed that drinking beetroot juice (which has natural nitrates) lowers blood pressure, and scientists know that our mouth bacteria turn those nitrates into nitrite, which then becomes nitric oxide in the body to relax blood vessels — exactly what the claim says.
Sex differences in the nitrate‐nitrite‐NO• pathway: Role of oral nitrate‐reducing bacteria
The study found that when people eat inorganic nitrate (like in beets or spinach), bacteria in their mouth turn it into nitrite, which then gets into the blood and helps make nitric oxide — just like the claim says.
The role of inorganic nitrate and nitrite in CVD
The study says that nitrates in vegetables turn into nitrite in your mouth, then into nitric oxide in your blood, which helps your blood vessels work better — exactly what the claim says.
Inorganic nitrate: A potential prebiotic for oral microbiota dysbiosis associated with type 2 diabetes.
The study shows that eating inorganic nitrate (like in beets or leafy greens) helps good mouth bacteria turn it into nitrite, which then turns into nitric oxide in the body — exactly what the claim says.