Cited by 587Nitric Oxide and Endothelin EffectsCardiovascular Health and Disease PreventionSodium Intake and Health

Effects of Dietary Nitrate on Blood Pressure in Healthy Volunteers

Open access
Larsen, Filip J., Ekblom, Björn, Sahlin, Kent, Lundberg, Jon O., Weitzberg, Eddie·2006·New England Journal of Medicine

Abstract

To the Editor: Nitric oxide, generated by nitric oxide synthase, is a key regulator of vascular integrity. This system is dysfunctional in many cardiovascular disorders, including hypertension. A fundamentally different pathway for the generation of nitric oxide was recently described in which the anions nitrate (NO3 ) and nitrite (NO2 ) are converted into nitric oxide and other bioactive nitrogen oxides.1-3 Nitrate is abundant in our diet, and particularly high levels are found in many vegetables.3 We examined the effect of 3-day dietary supplementation with either sodium nitrate (at a dose of 0.1 mmol per kilogram of body weight per day) or placebo (sodium chloride, at a dose of 0.1 mmol per kilogram per day) on blood pressure in 17 physically active, healthy volunteers, none of whom smoked (15 men and 2 women; mean age, 24 years). The study had a randomized, double-blind, crossover design with two different treatment periods during which the subjects received either nitrate or placebo; the treatment periods were separated by a washout period of at least 10 days. The compounds were dissolved in water and could not be distinguished by taste or appearance. During the two treatment periods, the subjects were instructed to avoid all foods with a moderate or high nitrate content.3 Systolic blood pressure Effects of 3-Day Dietary Supplementation with Inorganic Nitrate or Placebo on Systolic (Panel A) and Diastolic (Panel B) Blood Pressure in 17 Healthy Volunteers.) and pulse rate did not change significantly after nitrate supplementation, as compared with placebo supplementation. However, the diastolic blood pressure was on average 3.7 mm Hg lower after nitrate supplementation than after placebo supplementation (P<0.02) (Figure 1B), and the mean arterial pressure was 3.2 mm Hg lower (P<0.03). Plasma nitrate levels were higher after nitrate ingestion than after placebo ingestion (mean [±SD], 178±51 and 26±11 μM, respectively; P<0.001), as were plasma nitrite levels (219±105 and 138±38 nM, respectively; P<0.01). The daily nitrate dose used in the study corresponds to the amount normally found in 150 to 250 g of a nitrate-rich vegetable such as spinach, beetroot, or lettuce. It is clear from earlier studies, such as the Dietary Approaches to Stop Hypertension (DASH) trial, that a diet rich in fruits and vegetables can reduce blood pressure,4,5 but attempts to modify single nutrients have been inconsistent. Therefore, it has been argued that the effect of any individual nutrient is too small to detect in trials. In our study, reduced blood pressure was associated with nitrate supplementation alone; this effect was evident in young normotensive subjects. In fact, it was similar to that seen in the healthy control group in the DASH study.4 The exact mechanism behind the blood-pressure–lowering effect of nitrate needs to be clarified in future studies. We conclude that short-term dietary supplementation with inorganic nitrate reduces diastolic blood pressure in healthy young volunteers.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1056/nejmc062800

Cites

5 of 5 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The balance of evidence indicates that NO3- represents a potent dietary means for reducing systemic blood pressure.

    “Although the balance of evidence indicates that NO3- represents an potent dietary means for reducing systemic BP [22], [25], [27], [40], [6]”

    From Nitrate-responsive oral microbiome modulates nitric oxide homeostasis and blood pressure in humans (2018) · cites this paper as [27]

    The study reports that three days of dietary nitrate supplementation lowered diastolic blood pressure and mean arterial pressure in 17 healthy young volunteers (p. 1), supporting a blood-pressure-lowering effect. Systolic pressure did not change significantly, and the authors’ conclusion is limited to short-term supplementation and diastolic pressure in healthy young volunteers (p. 2). The broader claim that the balance of evidence establishes nitrate as a potent means of reducing systemic blood pressure exceeds those findings. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Dietary nitrate has a range of beneficial vascular effects, including reducing blood pressure, inhibiting platelet aggregation, preserving or improving endothelial dysfunction, enhancing exercise performance in healthy individuals and patients with peripheral arterial disease.

    “Dietary nitrate has been demonstrated to have a range of beneficial vascular effects, including reducing blood pressure, inhibiting platelet aggregation, preserving or improving endothelial dysfunction, enhancing exercise performance in healthy individuals and patients with peripheral arterial disease.”

    From Vascular effects of dietary nitrate (as found in green leafy vegetables and beetroot) via the nitrate-nitrite-nitric oxide pathway (2013) · cites this paper as [78]

    Split into 2 atoms — 0 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

    Experimental — accuracy not yet measured
  • Modest dietary supplementation with sodium nitrate lowers blood pressure in healthy volunteers.

    “Recently it was shown that modest dietary supplementation with sodium nitrate reduces blood pressure in healthy volunteers36.”

    From Nitrate and nitrite in biology, nutrition and therapeutics (2009) · cites this paper as [36]

  • Dietary NO3- supplementation through NO3- salts or vegetable products such as beetroot juice reduces blood pressure in healthy young and old humans.

    “The NO3-- NO2--NO reduction pathway underpins the discovery that dietary NO3- supplementation through consumption of NO3- salts [27] or vegetable products such as beetroot juice [23], [40] reduces blood pressure (BP) in healthy young and old humans.”
  • In 2006 Larsen et al. demonstrated that diastolic BP was reduced by 3.7 mmHg following 3 days' dietary supplementation with sodium nitrate (0.1 mmol kg-1 day-1) compared with placebo sodium chloride in 17 healthy volunteers (randomized, double-blind, crossover design).

    “in 2006 Larsen et al. demonstrated that diastolic BP was reduced by 3.7 mmHg following 3 days' dietary supplementation with sodium nitrate (0.1 mmol kg -1 day -1 ) compared with placebo sodium chloride in 17 healthy volunteers (randomized, double-blind, crossover design) [78].”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Larsen, F. J., Ekblom, B., Sahlin, K., Lundberg, J. O., & Weitzberg, E.
Venue
New England Journal of Medicine
Published
2006-12-28
Volume
355
Issue
26
Pages
2792-2793
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2051071984
Cited by
587
References
5
Citations by year
2026: 15 · 2025: 18 · 2024: 29 · 2023: 24 · 2022: 17 · 2021: 26 · 2020: 33 · 2019: 27 · 2018: 47 · 2017: 44 · 2016: 42 · 2015: 44 · 2014: 42 · 2013: 38 · 2012: 36
FWCI
10.63
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Diva portal (Dalarna University Library) (submittedVersion, other-oa)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
  • Health Sciences › Nursing › Nutrition and Dietetics › Sodium Intake and Health
Keywords
dietary nitrate, blood pressure, nitric oxide, nitrite, plasma nitrate, plasma nitrite, hypertension, healthy volunteers, mean arterial pressure, diastolic blood pressure, pulse rate, nitric oxide synthase, cardiovascular health, exercise training, nitrate-nitrite-nitric oxide pathway
MeSH terms
Adult, Blood Pressure, Double-Blind Method, Female, Humans, Male, Nitrates, Cross-Over Studies, Dietary Supplements

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review