Evidence map›Paper›PMID 25536008›Full record

Trial reportApplied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme2015

Acute dietary nitrate supplementation does not augment submaximal forearm exercise hyperemia in healthy young men.

Jin-Kwang Kim, David J Moore, David G Maurer, Daniel B Kim-Shapiro, Swati Basu, Michael P Flanagan, Ann C Skulas-Ray, Penny Kris-Etherton, David N Proctor

Open access · greenAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 13% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 46 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 1 institution in 1 country.

Jin-Kwang Kima Intercollege Graduate Degree Program in Physiology, The Pennsylvania State University, University Park, PA 16802, USA.
David J Moore
David G Maurer
Daniel B Kim-Shapiro
Swati Basu
Michael P Flanagan
Ann C Skulas-Ray
Penny Kris-Etherton
David N Proctor
Pennsylvania State University · US

Funding

Penn State Clinical and Translational Science InstituteUL1TR000127 · NCATS · PENNSYLVANIA STATE UNIV HERSHEY MED CTR · PI SINOWAY, LAWRENCE I · 2012 to 2015
$17.1M
Effects of Nitric Oxide in Sickle Cell BloodR37HL058091 · NHLBI · WAKE FOREST UNIVERSITY · PI KIM-SHAPIRO, DANIEL B · 2007 to 2016
$3.5M
Effects of Nitric Oxide in Sickle Cell BloodR01HL058091 · NHLBI · WAKE FOREST UNIVERSITY · PI KIM-SHAPIRO, DANIEL B · 2002 to 2006
$1.6M
MECHANISM AND KINETICS OF SICKLE CELL HEMOGLOBINR29HL058091 · NHLBI · WAKE FOREST UNIVERSITY · PI KIM-SHAPIRO, DANIEL B · 1998 to 2002
$260k
NCATS NIH HHS UL1 TR000127NHLBI NIH HHS HL058091NHLBI NIH HHS R01 HL058091NHLBI NIH HHS R29 HL058091NHLBI NIH HHS R37 HL058091
6 · The paper itself

Abstract

Despite the popularity of dietary nitrate supplementation and the growing evidence base of its potential ergogenic and vascular health benefits, there is no direct information about its effects on exercising limb blood flow in humans. We hypothesized that acute dietary nitrate supplementation from beetroot juice would augment the increases in forearm blood flow, as well as the progressive dilation of the brachial artery, during graded handgrip exercise in healthy young men. In a randomized, double-blind, placebo-controlled crossover study, 12 young (22 ± 2 years) healthy men consumed a beetroot juice (140 mL Beet-It Sport, James White Juice Company) that provided 12.9 mmol (0.8 g) of nitrate or placebo (nitrate-depleted Beet-It Sport) on 2 study visits. At 3 h postconsumption, brachial artery diameter, flow, and blood velocity were measured (Doppler ultrasound) at rest and during 6 exercise intensities. Nitrate supplementation raised plasma nitrate (19.5-fold) and nitrite (1.6-fold) concentrations, and lowered resting arterial pulse wave velocity (PWV) versus placebo (all p < 0.05), indicating absorption, conversion, and a biological effect of this supplement. The supplement-associated lowering of PWV was also negatively correlated with plasma nitrite (r = -0.72, p = 0.0127). Despite these systemic effects, nitrate supplementation had no effect on brachial artery diameter, flow, or shear rates at rest (all p ≥ 0.28) or during any exercise workload (all p ≥ 0.18). These findings suggest that acute dietary nitrate supplementation favorably modifies arterial PWV, but does not augment blood flow or brachial artery vasodilation during nonfatiguing forearm exercise in healthy young men.

Indexed as

Dietary SupplementsAdultBeta vulgarisBeveragesCross-Over StudiesDouble-Blind MethodExerciseForearmHand StrengthHumansHyperemiaMaleNitratesPlant ExtractsPlant RootsReference ValuesNitratesPlant Extractsfonction vasculaireinorganic nitratenitrate inorganiquepulse wave velocityvascular functionvélocité de l’onde pulsatile

Identifiers

PMID25536008
PMCPMC4314377
OpenAlexW2011783853

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.