- Conditions
- Acute Physiological Effects of Organic Guayusa Extract
- Interventions
- Acute Moderate-Dose Guayusa Extract Supplementation, Acute High-Dose Guayusa Extract Supplementation, Placebo
- Dietary Supplement
- Lead sponsor
- Nathaniel Jenkins
- Other
- Eligibility
- 18 Years to 45 Years
- Enrollment
- 32 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa
Search Results
Search by objective public record fields.
Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.
These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Showing 1–5
of 5
matching trials from the live ClinicalTrials.gov search.
- Conditions
- Cognitive Performance, Gaming Performance, Blood Pressure, Heart Rate, Mood
- Interventions
- Energy drink consumption
- Dietary Supplement
- Lead sponsor
- Nathaniel Jenkins
- Other
- Eligibility
- 18 Years to 50 Years
- Enrollment
- 34 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2023
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa
- Conditions
- Desire to Exercise, Exercise Training, Physical Exertion
- Interventions
- Organic Guayusa Extract, Placebo
- Dietary Supplement
- Lead sponsor
- Nathaniel Jenkins
- Other
- Eligibility
- 18 Years to 45 Years · Female only
- Enrollment
- 57 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa
- Conditions
- Caffeine, Exercise Performance, Energy Drink, Cardiovascular Safety, Mood
- Interventions
- Acute energy drink or placebo consumption
- Dietary Supplement
- Lead sponsor
- Nathaniel Jenkins
- Other
- Eligibility
- 20 Years to 35 Years · Male only
- Enrollment
- 109 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2021 – 2022
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa
- Conditions
- Adverse Childhood Experiences, Vascular Dilatation, Sleep, Sleep Disturbance, Psychosocial Stressor, Psychological Trauma, Endothelial Dysfunction, Inflammation, Oxidative Stress
- Interventions
- Cognitive Behavioral Therapy for Insomnia (CBT-i)
- Behavioral
- Lead sponsor
- Nathaniel Jenkins
- Other
- Eligibility
- 18 Years to 29 Years
- Enrollment
- 70 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2024 – 2028
- U.S. locations
- 1
- States / cities
- Iowa City, Iowa