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Showing 25–41 of 17 matching trials from the live ClinicalTrials.gov search.
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Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Probiotics (L. Helveticus, B. Longum, and B. Bifidum) on Immune Function and Digestive Health

NCT01709825
View directory record Official record
Conditions
Healthy
Interventions
Probiotic- Bifidobacterium Bifidum, Sugar Pill, Probiotic- Lactobacillus helveticus, Probiotic- Bifidobacterium longum ss. Infantis R0033
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
583 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 28, 2015 · Synced Sep 9, 2026, 5:03 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Kidney Blood Flow During Exercise in Older African American Adults

NCT07029165
View directory record Official record
Conditions
Healthy
Interventions
Acute exercise, Cold pressor test, Mental stress test
Other
Lead sponsor
University of Massachusetts, Boston
Other
Eligibility
55 Years to 79 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Sep 9, 2026, 5:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Variability in Adrenergic Response

NCT00838695
View directory record Official record
Conditions
Vascular Reaction to Medications
Interventions
Phenylephrine
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 40 Years
Enrollment
106 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 25, 2018 · Synced Sep 9, 2026, 5:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Feasibility Trial of Narrative Exposure Therapy (NET) for Posttraumatic Stress Disorder (PTSD) During Pregnancy

NCT04525469
View directory record Official record
Conditions
Post Traumatic Stress Disorder
Interventions
Narrative Exposure Therapy
Behavioral
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 21, 2022 · Synced Sep 9, 2026, 5:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Galactooligosaccharide, Immune Strength, and Digestive Health

NCT01137760
View directory record Official record
Conditions
Healthy
Interventions
Sucrose, Galactooligosaccharide
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
427 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Aug 1, 2012 · Synced Sep 9, 2026, 5:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Mindfulness Programs on Postoperative Pain

NCT04788329
View directory record Official record
Conditions
Post Operative Pain
Interventions
"Prepare for Surgery, Heal Faster" Program, Wim Hof Method
Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 100 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 20, 2022 · Synced Sep 9, 2026, 5:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Enhanced Firefighter Rehab Trial: The Role of Aspirin in Preventing Heat Stress Induced Platelet Activation

NCT01066923
View directory record Official record
Conditions
Heat Stress Disorders
Interventions
Daily aspirin (ASA), Active cooling, Acute aspirin (ASA), Passive cooling, Daily placebo, Acute placebo
Drug · Other
Lead sponsor
Dave Hostler
Other
Eligibility
18 Years to 49 Years
Enrollment
124 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 12, 2017 · Synced Sep 9, 2026, 5:03 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

The Role of Environmental Temperatures in Respiratory Control

NCT07470086
View directory record Official record
Conditions
Work of Breathing
Interventions
Thermoneutral temperature environment, Cold temperature environment, Hot temperature environment
Other
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 40 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2028 – 2029
U.S. locations
1
States / cities
Bloomington, Indiana
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Sep 9, 2026, 5:03 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Acute Cryotherapy on Musculoskeletal Function and Biomarkers

NCT07211412
View directory record Official record
Conditions
Exercise Induced Muscle Damage, Cryotherapy
Interventions
Cryotherapy, Eccentric exercise-induced muscle damage
Other
Lead sponsor
University of Texas, El Paso
Other
Eligibility
18 Years to 30 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
El Paso, Texas
Source: ClinicalTrials.gov public record
Updated Oct 7, 2025 · Synced Sep 9, 2026, 5:03 PM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

Exploring Sympathetic Nervous System Function in Individuals With Down Syndrome

NCT07238465
View directory record Official record
Conditions
Down Syndrome, Autonomic Dysfunction
Interventions
Fear Response, Cold Stress, Pain Response, Caffeine, 12-Hour Fast, Maximal Dynamic Exercise
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 50 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Sep 9, 2026, 5:03 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

High Resolution Phenotyping in Healthy Humans

NCT00943774
View directory record Official record
Conditions
Pressor Response, Baroreflex Sensitivity, Blood Pressure Variability, Heart Rate Variability, Arterial Catecholamines
Interventions
Physiological maneuvers
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 50 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2013
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 5, 2016 · Synced Sep 9, 2026, 5:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Glutathione on Immunity in Individuals Training for a Marathon

NCT03725241
View directory record Official record
Conditions
Healthy
Interventions
Glutathione Supplement, Placebo Supplement
Dietary Supplement
Lead sponsor
University of North Texas, Denton, TX
Other
Eligibility
19 Years to 45 Years
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Denton, Texas
Source: ClinicalTrials.gov public record
Updated Nov 18, 2020 · Synced Sep 9, 2026, 5:03 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Characterizing Subjective and Physiological Responses to Stress and Pain and Cognitive Learning and Executive Function

NCT04419831
View directory record Official record
Conditions
Pain Response, Stress, Trauma
Interventions
Yale Stress Pain Test (YSPT)
Diagnostic Test
Lead sponsor
Yale University
Other
Eligibility
18 Years to 50 Years
Enrollment
81 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 6, 2024 · Synced Sep 9, 2026, 5:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Appetite Hormones in Binge Eating Disorder

NCT01552759
View directory record Official record
Conditions
Binge Eating Disorder
Interventions
Postprandial responses, Cold pressor test, Test meal
Procedure · Behavioral
Lead sponsor
New York Obesity and Nutrition Research Center
Other
Eligibility
18 Years to 50 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 10, 2013 · Synced Sep 9, 2026, 5:03 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Characterization of Sympathetic Nerve Activity in Stress Cardiomyopathy

NCT01048125
View directory record Official record
Conditions
Cardiomyopathy
Interventions
Sympathetic Nerve Activity, Mental Stress Test (Color Word Test), The Modified Oxford Technique for Baroreflex Sensitivity, Cold Pressor Test, Echocardiographic evaluation
Device · Behavioral · Drug + 1 more
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 90 Years
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 22, 2016 · Synced Sep 9, 2026, 5:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Neural Control of Kidney Blood Flow During Exercise in African American Adults

NCT03981640
View directory record Official record
Conditions
Healthy
Interventions
Acute exercise, Cold pressor test, Mental stress test
Other
Lead sponsor
University of Massachusetts, Boston
Other
Eligibility
18 Years to 35 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Sep 9, 2026, 5:03 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Study to Analyze the Role of Sympathetic Nervous System in Spontaneous Coronary Artery Dissection

NCT05699200
View directory record Official record
Conditions
Spontaneous Coronary Artery Dissection, Healthy
Interventions
Arterial Tonometry, Echocardiogram, Carotid Ultrasounds, Elastography, Ankle-Brachial Index, Microneurography with sympathoexcitatory maneuvers
Other · Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 9, 2026, 5:03 PM EDT