Skip to main content
OpenTrials
Completed

NCT Number: NCT06982365

Study to Investigate the Potential Health Benefits of Grapes Seeds Extract Supplementation in the Management of Elevated Blood Pressure or Stage 1 Hypertension

This study is a pragmatic, randomized, double-blind, placebo-controlled trial aimed at evaluating the potential health benefits of Enovita® (standardized grape seed extract) supplementation in adults with elevated blood pressure or Stage 1 hypertension. The primary objective is to assess the impact of Enovita® on systolic and diastolic blood pressure over 8 weeks. Secondary outcomes include changes in mood, emotional well-being, perceived stress, lipid profile, and systemic inflammation. The study will also monitor the safety and tolerability of Enovita®.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Elevated Blood Pressure Cardiovascular Diseases Hypertension Vascular Diseases

Age range

30 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Liaquat University of Medical & Health Sciences (LUMHS)

Jāmshoro, Sindh, 76090, Pakistan

About this study

Hypertension is a major risk factor for cardiovascular diseases, and its early management is crucial. Grape seed extract is a natural polyphenol-rich supplement that may offer antihypertensive benefits through its antioxidant, anti-inflammatory, and vasodilatory properties. This study aims to investigate the effectiveness of a standardized Grape seeds extract, Enovita® in reducing blood pressure in adults with elevated blood pressure or Stage 1 hypertension.

This is a pragmatic, randomized, double-blind, placebo-controlled trial involving two groups: the Enovita® group receiving 150 mg of Enovita® twice daily and the placebo group receiving matching placebo capsules. The intervention will last for 8 weeks. Participants will be assessed at baseline, 4 weeks, and 8 weeks.

The primary outcome is the change in systolic and diastolic blood pressure from baseline to 8 weeks. Secondary outcomes include changes in mood (PANAS and WEMWBS scores), perceived stress (PSQ-20 score), lipid profile (total cholesterol, LDL, HDL, triglycerides), and systemic inflammation (hs-CRP levels). Safety will be monitored through adverse event reporting and regular health assessments.

This study will provide insights into the potential of Enovita® as a natural intervention for managing mild hypertension and improving emotional well-being.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Adults aged 30 to 65 years.
  • Diagnosed with Elevated Blood Pressure (systolic 120-129 mmHg and diastolic <80 mmHg) or Stage 1 Hypertension (systolic 130-139 mmHg or diastolic 80-89 mmHg), according to American Heart Association guidelines.
  • No use of antihypertensive medication in the past 3 months.
  • Willing to comply with study procedures and follow-up visits.
  • Able to provide written informed consent.

Exclusion criteria

  • Stage 2 Hypertension (systolic BP ≥140 mmHg or diastolic BP ≥90 mmHg) at screening.
  • Chronic kidney disease (eGFR < 60 mL/min/1.73 m²).
  • Diabetes mellitus (HbA1c ≥ 6.5%).
  • History of cardiovascular events (myocardial infarction, stroke) in the past 6 months.
  • Known allergy to grape products.
  • Current use of polyphenol supplements or similar herbal products.
  • Pregnancy or breastfeeding.
  • Participation in another clinical trial within the last 30 days.

Treatment and study plan

Enovita® (Grape Seed Extract)

Dietary Supplement

Enovita® is a standardized grape seed extract containing polyphenols, known for their antioxidant and vasodilatory properties. Participants in this group will take 150 mg of Enovita® orally, twice daily (total daily dose: 300 mg) for 8 weeks.

Placebo capsule

Other

Participants in this group will receive a matching placebo capsule identical in appearance to the Enovita® capsule, taken orally, twice daily for 8 weeks.

Other names: Matching Placebo Capsule

Primary outcomes

  1. Change in Systolic and Diastolic Blood Pressure

    Time frame: Baseline (Week 0) and Week 8.

    Evaluation of the change in systolic and diastolic blood pressure (measured in mmHg) from baseline (Week 0) to the end of the study (Week 8). Blood pressure will be measured using a validated automatic sphygmomanometer in a seated position, following standardized protocols.

Secondary outcomes

  1. Change in Mood (Positive and Negative Affect Schedule - PANAS Total Score)

    Time frame: Baseline and Week 8.

    Assessment of mood using the Positive and Negative Affect Schedule (PANAS), a self-reported questionnaire measuring both positive and negative emotional states. Each subscale (Positive Affect and Negative Affect) consists of 10 items scored from 1 to 5, resulting in subscale scores ranging from 10 to 50. Higher Positive Affect scores indicate better mood, while higher Negative Affect scores indicate worse mood.

    Participants will complete the PANAS at Baseline (Week 0) and Week 8.

  2. Change in Perceived Stress (Perceived Stress Questionnaire - PSQ-30 Total Score)

    Time frame: Baseline and Week 8.

    Measurement of perceived stress using the Perceived Stress Questionnaire (PSQ-30), a standardized 20-item self-reported measure. Each item is rated on a 4-point Likert scale. The PSQ-20 total score is scaled between 0 (lowest stress) and 1 (highest stress). Higher scores reflect greater perceived stress. Participants will complete the questionnaire at Baseline and Week 8.

  3. Change in Lipid Profile

    Time frame: Baseline and Week 8.

    Assessment of lipid profile using fasting blood samples, measuring total cholesterol, LDL, HDL, and triglycerides levels.

  4. Change in Systemic Inflammation (hs-CRP Levels)

    Time frame: Baseline and Week 8.

    Measurement of high-sensitivity C-reactive protein (hs-CRP) levels in fasting blood samples as a marker of systemic inflammation.

  5. Incidence and Severity of Treatment-Emergent Adverse Events (Safety and Tolerability of Enovita®)

    Time frame: Baseline to Week 8.

    Monitoring and recording of treatment-emergent adverse events (TEAEs) throughout the study. This includes the number of participants experiencing one or more TEAEs, the type of event, severity (mild, moderate, severe), and relationship to the investigational product (Enovita®). All events will be collected from Baseline through Week 8.

Sponsors and collaborators

Lead sponsor

Liaquat University of Medical & Health Sciences

Other

Registry information

Official study title

Study to Investigate the Potential Health Benefits of Grapes Seeds Extract Supplementation in the Management of Elevated Blood Pressure or Stage 1 Hypertension: A Pragmatic Randomized, Double-blind Placebo Controlled Trial

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
May 21, 2025
Registry last updated
Dec 5, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.