Cited by 11Cardiovascular Health and Disease PreventionCardiovascular and exercise physiologyNitric Oxide and Endothelin Effects

Effects of a Dietary Beetroot Juice Treatment on Systemic and Cerebral Haemodynamics—A Pilot Study

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Millis, Richard Mark·2016·JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH

Abstract

INTRODUCTION: Beetroot Juice (BJ) contains dietary nitrates that increase the blood Nitric Oxide (NO) level, decrease Blood Pressure (BP), increase athletic performance and improve cognitive functions but the mechanism remains unclear. Ultrasonographic measurement of middle cerebral artery blood flow velocity with computation of Cerebral Augmentation Index (CAIx) is a measure of the reflected flow signal, modulated by changes in cerebrovascular resistance and compliance. AIM: This pilot study tests the hypothesis that ingestion of an amount of BJ sufficient to raise the blood NO level two-to three-fold, decreases Transcranial Doppler (TCD) measured CAIx. MATERIALS AND METHODS: Ten healthy young-adult African-American women were studied at two levels of submaximal exercise, 40% and 80% of their predetermined peak oxygen consumptions. The subjects ingested nitrate-free orange juice (OJ, control) and an isocaloric BJ beverage (1.5 mg/mL nitrate, 220 Cal), on different days, 1-2 weeks apart. RESULTS: The BJ treatment increased blood NO and decreased systolic BP at rest and at the two levels of exercise. The BJ treatment decreased CAIx only at the two levels of exercise (from 79 ± 2% to 62 ± 2% and from 80 ± 2% to 60 ± 3%, p<0.05). Exercise increased TCD-measured resistance and pulsatility indices (RIx, PIx) without changing AIx. The BJ treatment had no effect on RIx and PIx. CONCLUSION: These findings suggest that decreased CAIx associated with aerobic exercise reflects the change in cerebral haemodynamics resulting from dietary nitrate supplementation. Future studies should determine whether the BJ-induced decrement in CAIx is correlated with an improvement in brain function.

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Crossref · 10.7860/jcdr/2016/20049.8113

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Authors
Millis, R. M.
Affiliations
Howard University (US)
Corresponding author
Millis, Richard Mark
Venue
JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH
Published
2016
Volume
10
Issue
7
Pages
CC01-5
ISSN
  • 0973-709X (ISSN-L)
  • 2249-782X
OpenAlex
W2512182317
Cited by
10
References
32
Citations by year
2026: 2 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1
FWCI
0.55
Type
journal article
Language
en
Open access
Licence
cc-by-nc-nd
Locations
  • JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Digital Howard (Howard University) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Center for Research Resources (G12RR003048)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
Keywords
beetroot juice, dietary nitrate, nitric oxide, cerebral hemodynamics, middle cerebral artery blood flow, cerebrovascular resistance, pulsatility index, resistance index, aerobic exercise, blood pressure, transcranial Doppler

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