If you eat a little more nitrate-rich food like spinach or beets each day, the amount of nitrate in your blood goes up by a predictable amount, which might help your heart by turning that nitrate into a substance that relaxes your blood vessels.
Claim Language
Language Strength
definitive
Uses definitive language (causes, prevents, cures)
The claim uses 'increases' and 'demonstrating' to assert a precise, predictable, and direct effect (19.6 µmol/L per mmol), which implies causation and certainty rather than probability or association.
Context Details
Domain
nutrition
Population
human
Subject
Each additional millimole of dietary nitrate per day
Action
increases
Target
chronic plasma nitrate levels by 19.6 µmol/L in adults
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 (1)
Plasma nitrate, dietary nitrate, blood pressure, and vascular health biomarkers: a GRADE-Assessed systematic review and dose-response meta-analysis of randomized controlled trials
This study found that eating more nitrate-rich foods (like spinach or beets) raises nitrate levels in the blood by exactly the amount the claim says — 19.6 µmol/L per extra millimole — and this happens in a straight-line, predictable way, which supports the idea that nitrate helps your blood vessels work better.