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Study on the effectiveness of a dietary supplement containing grape pomace extract and L-arginine for blood pressure control in people with mild to moderate hypertension

A randomized, double-blind, placebo-controlled trial to evaluate the effects of grape pomace extract and L-arginine supplementation on blood pressure in individuals with mild to moderate hypertension

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN99673579
Enrollment
300
Registered
2025-11-17
Start date
2025-05-05
Completion date
Unknown
Last updated
2025-12-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Mild to moderate essential hypertension Circulatory System

Interventions

Participants in this study are randomly assigned to one of four groups: - Group 1: Individuals with grade 1 hypertension (systolic BP 130-150 mmHg, diastolic BP 90-95 mmHg) receive one tablet per day

Sponsors

NGN Healthcare—New Generation Nutraceuticals s.r.l.
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 75 Years

Inclusion criteria

Inclusion criteria: 1. Male and female subjects, of caucasian ethnicity, resident in Italy, aged 18–75 years 2. Documented diagnosis of essential hypertension for at least one year before study initiation 3. Ongoing treatment with antihypertensive medications that will not be modified during the study 4. No additional cardiological (e.g., atrial fibrillation, heart failure) or metabolic (e.g., diabetes, dyslipidaemia) comorbidities 5. Ability to understand the study procedures and to provide written informed consent

Exclusion criteria

Exclusion criteria: 1. Any autoimmune, rheumatologic or vascular disease other than essential hypertension 2. Severe hypertension (grade 3: =171/106 mmHg) 3. Diabetes mellitus 4. Irregular sleep/wake rhythm (e.g., night-shift workers within the last 3 months) 5. Total cholesterol >250 mg/dl or triglycerides >200 mg/dl 6. Cardiovascular events (myocardial infarction and/or stroke) in the past 6 months 7. Renal impairment (serum creatinine >1.5 mg/dl) or hepatic impairment (ALT/AST and/or ?-GT twice above normal values) 8. Anaemia (Hb 3 kg in the 3 months before enrolment 12. Malignant neoplasms 13. Significant neurological or psychiatric disorders, including alcohol or drug abuse 14. Concomitant therapy with: hypoglycaemic agents, laxatives, cyproheptadine, antidepressants, antiserotonergic drugs, phenothiazines, barbiturates, oral corticosteroids, or antipsychotics 15. Pregnancy or breastfeeding 16. Women of childbearing potential not using adequate contraception

Design outcomes

Primary

MeasureTime frame
Blood pressure measured using sphygmomanometer at baseline, 4, 8, and 12 weeks of treatment, and at the end of the 4-week follow-up period.

Secondary

MeasureTime frame
1. Fasting blood glucose measured using a blood glucose meter at baseline, 4, 8, and 12 weeks of treatment, and at the end of the 4-week follow-up period 2. Lipid profile (total cholesterol, LDL, HDL, triglycerides) measured using blood sample analysis at baseline, 4, 8, and 12 weeks of treatment, and at the end of the 4-week follow-up period 3. Liver function (AST and ALT) measured using blood sample analysis at baseline, 4, 8, and 12 weeks of treatment, and at the end of the 4-week follow-up period 4. Kidney function (microalbuminuria and creatinine clearance) measured using urine and blood sample analysis at baseline, 4, 8, and 12 weeks of treatment, and at the end of the 4-week follow-up period 5. Quality of life measured using the SF-12 health survey at baseline and at the end of 12 weeks of treatment

Countries

Italy

Contacts

Public ContactElisabetta Schiano
elisabetta.schiano@unina.it3405387058

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026