Hibiscus (Hibiscus sabdariffa) trials recruiting now
2 registrations that name hibiscus as a study arm and are recruiting or about to, as ClinicalTrials.gov listed them on Oct 20, 2026. Read each listing for its full criteria and current status.
Kymata never assesses eligibility. Each listing names its own criteria; only its study team can say whether someone can join. Trial doses are given under the trial's monitoring and are not a schedule for anyone outside it.
Filter 2 registrations
Status
All 2 registrations
Not yet recruitingNCT07047742
Efficacy of Dietary Interventions and Educational Programs as Adjunctive Therapies for the Management of Urolithiasis: Efficacy of Fresh Lemon Juice and Roselle as Educational Program on Urolithiasis Parameters
No phase
Hawler Medical University
About 200 people
Starts Jul 1, 2025 (estimated)
In plain words A study of hibiscus in people 18 to 75, run by Hawler Medical University. It plans to enroll about 200 people at 1 site, none in the US.
Who it lists and where
Who the trial lists, as registered
Lists people 18 to 75. Conditions: Urolithiasis, Lemon Juice.
The following aspects is considered for the inclusion of participants in the study:
Adults aged 18-75 years diagnosed with urolithiasis.
Patients are willing to participate and provide informed consent.
Patients do not currently use lemon juice, Roselle, or other herbal treatments for urolithiasis.
1 more inclusion criterion and the exclusion criteria are on the listing.
What it tests, as registered
lemon juice; Roselle; Education on urolithiasis management
Registered summary
The Efficacy of Dietary and Health Educational Program, as Adjunctive Therapies for the Management of Urolithiasis Introduction Background Urolithiasis, commonly known as kidney stone disease, is a prevalent global health concern affecting millions of individuals annually. The incidence and recurrence of urolithiasis have been increasing due to dietary habits, metabolic disorders, and genetic predispositions (Qian et al., 2022). The full summary is on the listing.
Where, as registered
No US site; Iraq (1).
Not yet recruitingNCT07159152
Effects of Coffee Versus Hibiscus Tea Consumption During Prolonged Sitting on Blood Pressure and Heart Rate
No phase
King Saud University
About 30 people
Starts Sep 1, 2025 (estimated)
In plain words A study of hibiscus in people 18 to 35, run by King Saud University. It plans to enroll about 30 people at 1 site, none in the US.
Who it lists and where
Who the trial lists, as registered
Lists people 18 to 35; healthy volunteers accepted. Conditions: Hypertension.
Age between 18 and 35 years.
Normal to elevated blood pressure (systolic <130 mmHg and diastolic <80 mmHg) and normal resting heart rate (60-100 bpm), ensuring selection of healthy adults and minimizing confounding factors.
Generally healthy, without chronic or acute medical conditions, to reduce external influences on study outcomes.
Physically inactive, not meeting current physical activity guidelines, as the study targets sedentary individuals.
The exclusion criteria are on the listing.
What it tests, as registered
Coffee; Hibiscus drink
Registered summary
Modern lifestyles often involve long periods of sitting, which can increase the risk of heart problems, obesity, and other health issues. Diet also plays a key role in heart health. Coffee and hibiscus tea are two common beverages, but their effects during prolonged sitting are not well understood. This study will examine how drinking coffee versus hibiscus tea affects blood pressure, heart rate, and heart rate variability in men and women during extended periods of sitting. The full summary is on the listing.