- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03380000
Effect of Beetroot Juice on Blood Pressure Regulation in Post Menopausal Women
June 16, 2022 updated by: David N. Proctor, PhD, Penn State University
Acute Blood Pressure-lowering Effects of Beetroot Juice in Postmenopausal Women With and Without Hypertension
In this study the investigators will test the hypothesis that acute consumption of inorganic nitrate (supplied in concentrated beetroot juice) reduces artery stiffness and resting blood pressure, and lessens the rise in blood pressure during handgrip exercise in postmenopausal women.
Understanding and improving artery function and blood pressure regulation in women is important because they undergo accelerated arterial stiffening after menopause and have much larger increases in blood pressure when they exercise compared with either premenopausal women or men of similar age.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
Postmenopausal women have stiff central arteries and exaggerated blood pressure (BP) responses during exercise compared with either premenopausal women or men of similar age.
Arterial stiffness and exaggerated BP responses to exercise are prognostic for heart wall thickening, future hypertension, adverse cardiovascular events, and mortality.
Previous studies have reported that acute consumption of nitrate-rich beetroot juice can lower resting and exercising BP responses in older adults.
However, these studies included both sexes and did not compare the effects of beetroot juice to a nitrate-depleted placebo (a true control).
Thus, the potential BP lowering effects of nitrate supplementation per se have not been established in postmenopausal women.
The present study examines the acute (single dose) effects of nitrate-rich beetroot juice on resting hemodynamics (peripheral and central BP, arterial wave properties, etc), and physiological responses to handgrip exercise in metabolically healthy post-menopausal women.
Study Type
Interventional
Enrollment (Actual)
16
Phase
- Phase 2
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Pennsylvania
-
University Park, Pennsylvania, United States, 16802
- Penn State University
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
53 years to 78 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
Female
Description
Inclusion Criteria:
- Resting systolic blood pressure less than or equal to 160 mmHg
- Resting diastolic blood pressure less than or equal to 100 mmHg
Exclusion Criteria:
- Overt cardiovascular, metabolic, hematologic, pulmonary, renal, musculoskeletal, and/or neurological disease(s)
- Users of any tobacco and/or nicotine products (smokers, chewing tobacco, nicotine-containing patches/gum, smokeless cigarettes)
- Body mass index greater than 35
- Total cholesterol greater than 239 mg/dl
- LDL cholesterol greater than 159 mg/dl
- Fasting blood triglycerides greater than 199 mg/dl
- Fasting blood glucose greater than 109 mg/dl and HbA1c greater than 6.0%
Individuals currently taking any of the following medications:
- blood pressure lowering medication (e.g., beta blockers, ACE inhibitors, angiotensin antagonists, calcium channel blockers, diuretics)
- lipid-lowering medication (e.g., statins)
- nitrates (e.g. nitroglycerin) for angina
- phosphodiesterase inhibitors (e.g., Viagra)
- anti-inflammatory drugs
- Individuals currently taking hormone replacement therapy
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Nitrate rich beetroot juice
Subjects will consume 140 ml of beetroot juice (Beet-It Organic Shot) approximately 90 min before physiological testing.
|
This beverage contains 0.3 g of inorganic nitrate per 70 ml container, and is bottled and supplied by James White Drinks (UK).
Other Names:
|
Placebo Comparator: Nitrate depleted beetroot juice
Subjects will consume 140 ml of beetroot juice (Beet-It Organic Placebo) approximately 90 min before physiological testing.
|
This beverage is identical in look and taste to the Beet-It organic shot, but has the nitrate removed.
It is also bottled and supplied by James White Drinks (UK).
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Resting Aortic Blood Pressures
Time Frame: Resting systolic blood pressure at 90 minutes after beetroot juice ingestion
|
Aortic Blood pressures were measured in the arm (cuff) and estimated in the aorta (radial artery tonometry).
|
Resting systolic blood pressure at 90 minutes after beetroot juice ingestion
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Blood Measures of Nitrate Absorption and Conversion
Time Frame: Change from baseline measures of plasma nitrate and nitrite at 90 minutes and at approximately 6 hours
|
Venous blood will be withdrawn (venipuncture) for determination of plasma nitrate and nitrite.
|
Change from baseline measures of plasma nitrate and nitrite at 90 minutes and at approximately 6 hours
|
Resting Arterial Stiffness/Wave Properties
Time Frame: Change from baseline resting pulse wave velocity at 90 minutes after beet root juice ingestion
|
Carotid to femoral artery pulse wave velocity will be assessed using arterial tonometry.
|
Change from baseline resting pulse wave velocity at 90 minutes after beet root juice ingestion
|
Handgrip Exercise Blood Pressure Responses (Relative Change From Baseline)
Time Frame: Approximately 180 minutes after ingestion of beetroot juice
|
Beat-to-beat blood pressure (finger cuff) will be assessed at rest and during handgrip exercise to volitional fatigue.
|
Approximately 180 minutes after ingestion of beetroot juice
|
Peak Rate of Perceived Exertion Scores During Handgrip Exercise
Time Frame: Approximately 90 minutes after ingestion of beetroot juice
|
The Borg Rating of Perceived Exertion Scale (RPE) was used to assess exercise intensity during handgrip exercise.
The RPE scale ranges from a minimum of 6 (no exertion at all) to a maximum of 20 (maximal exertion) units on a scale.
|
Approximately 90 minutes after ingestion of beetroot juice
|
Handgrip Exercise Tolerance
Time Frame: Approximately 90 minutes after ingestion of beetroot juice
|
Time to fatigue (seconds) was assessed during a progressive blood flow restricted handgrip exercise protocol.
|
Approximately 90 minutes after ingestion of beetroot juice
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: David N Proctor, PhD, Penn State University
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
September 12, 2014
Primary Completion (Actual)
September 1, 2019
Study Completion (Actual)
January 1, 2020
Study Registration Dates
First Submitted
December 10, 2017
First Submitted That Met QC Criteria
December 15, 2017
First Posted (Actual)
December 20, 2017
Study Record Updates
Last Update Posted (Actual)
July 12, 2022
Last Update Submitted That Met QC Criteria
June 16, 2022
Last Verified
June 1, 2022
More Information
Terms related to this study
Other Study ID Numbers
- 00043633
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Yes
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Postmenopausal Women
-
University of Sao PauloAlzChem AGUnknown
-
Cairo UniversityRecruitingPostmenopausal WomenEgypt
-
Warner ChilcottCompletedPostmenopausal WomenUnited States
-
University of North Carolina, Chapel HillNational Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)Completed
-
Cairo UniversityRecruitingPostmenopausal WomenEgypt
-
Fundación Santiago Dexeus FontCompleted
-
Organon and CoCompletedPostmenopausal Women
-
University of Campinas, BrazilUnknownHysteroscopy | Postmenopausal WomenBrazil
-
Texas Tech University Health Sciences CenterWithdrawnPostmenopausal Women | DynapeniaUnited States
-
Karadeniz Technical UniversityCompletedPostmenopausal Women | Raloxifene
Clinical Trials on Beetroot juice
-
Universidad Francisco de VitoriaUniversity of Alcala; University of SevilleCompleted
-
Bangor UniversityCompleted
-
University Hospital, GhentUniversity GhentTerminated
-
University of ManchesterCompleted
-
Queen Mary University of LondonCompleted
-
University of Colorado, BoulderRecruitingChronic Kidney DiseaseUnited States
-
Penn State UniversityActive, not recruitingMetabolic SyndromeUnited States
-
Wake Forest University Health SciencesCompletedStroke | Ischemic Stroke | Cerebrovascular AccidentUnited States
-
University of ReadingSaudi Cultural BureauCompletedNo Dental Disease | Non-smokingUnited Kingdom
-
Bournemouth UniversityInstitute of Bioengineering and Bioimaging (IBB); University of Portsmouth; Loughborough...Completed