Clinical trial Recruiting at 1 site Early Phase 1 Interventional Ages 18 to 75

Nitrate supplementation effects on blood pressure in resistant hypertension patients

Official title: Effect of Nitrate Supplementation on Blood Pressure and Systemic Microvascular Function of Resistant Hypertensive Patients

Run by National Institute of Cardiology, Laranjeiras, Brazil · NCT06169241 · Data updated 2026-11-12

This study tests if taking beetroot extract can help lower blood pressure in people with resistant hypertension who haven't changed their blood pressure medications recently.

More Arterial Hypertension trials

Quick facts

PhaseEarly Phase 1
Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment50 (estimated)
SponsorNational Institute of Cardiology, Laranjeiras, Brazil
Government
Locations1 site (Rio de Janeiro)
StatusRecruiting
StartedNovember 1, 2023
Main results expectedDecember 2026
Study endsDecember 2026
Registry record updatedApril 13, 2026
Trial IDNCT06169241 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are individuals diagnosed with resistant hypertension who have not changed their antihypertensive medications in the last 30 days.

Probably not a fit

Patients with neoplasms, heart failure, or those using medications containing nitrates will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial investigates the impact of nitrate supplementation, specifically through beetroot extract, on blood pressure and microvascular function in patients with resistant hypertension. The study aims to determine whether increasing nitric oxide availability can lead to improved vasodilation and overall cardiovascular health. Participants will be randomly assigned to receive either the beetroot extract or a placebo, with careful monitoring of their blood pressure and microvascular responses. The trial focuses on patients who have not altered their antihypertensive medications in the past month.

Why it matters

Potential benefit: If successful, this study could provide a novel dietary approach to managing resistant hypertension and improving cardiovascular health.

How similar studies have gone: While the use of dietary nitrates has shown promise in other studies, this specific approach in resistant hypertension is relatively novel and requires further investigation.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Resistant hypertension, with a diagnosis described in the medical record, without changing medications or increasing doses in the last 30 days.

Exclusion Criteria:

* neoplasms
* heart failure
* use of medications with nitrate in their formula
* patients undergoing renal denervation

Where it's running

  • National Institute of Cardiology
    Rio de Janeiro, Brazil
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.