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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Supplements Clear all
Recruiting Not applicable Interventional

A Study of Herbal Supplements in Cancer Survivors With Constipation

NCT07091084
View directory record Official record
Conditions
Constipation, Cancer, Functional Constipation
Interventions
MZRW
Dietary Supplement
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
7
States / cities
Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 10, 2026, 9:23 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Trial of Antibody Responses by Vitamin Supplementation

NCT03859687
View directory record Official record
Conditions
Healthy Participants
Interventions
Vitamin A supplementation, No vitamin A supplementation
Biological
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
1 Year to 4 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 4, 2025 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Sports Supplements on Blood Flow

NCT04278053
View directory record Official record
Conditions
Determine the Effects of Nitrosigine and Citrulline-malate on Flow-mediated Dilation Among Young Adults
Interventions
inositol-stabilized arginine silicate
Dietary Supplement
Lead sponsor
University of Arkansas, Fayetteville
Other
Eligibility
18 Years to 29 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Fayetteville, Arkansas
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Phase 2 Interventional

Zinc Supplements in Lowering Cadmium Levels in Smokers

NCT00376987
View directory record Official record
Conditions
Bladder Cancer, Cervical Cancer, Esophageal Cancer, Gastric Cancer, Head and Neck Cancer, Kidney Cancer, Leukemia, Liver Cancer, Lung Cancer, Pancreatic Cancer, Tobacco Use Disorder
Interventions
zinc oxide
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
21 Years to 120 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2015
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Garlic Supplements on Opioids in Healthy Volunteers

NCT00499460
View directory record Official record
Conditions
Healthy, No Evidence of Disease
Interventions
garlic powder tablets, oxycodone
Dietary Supplement · Drug
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
21 Years to 45 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 6, 2017 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Comparing Blood Sugar Levels and Endothelial Function of PEAK ATP® With GlycoCarn®, PEAK ATP® and GlycoCarn® Supplements

NCT01855373
View directory record Official record
Conditions
Blood Sugar, Endothelial Function
Interventions
PEAK ATP® with GlycoCarn®, PEAK ATP®, GlycoCarn®, Placebo
Dietary Supplement · Other
Lead sponsor
Supplement Formulators, Inc.
Industry
Eligibility
25 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Fort Lauderdale, Florida
Source: ClinicalTrials.gov public record
Updated Apr 14, 2016 · Synced Sep 10, 2026, 9:23 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Calcium DXA: Impact of Calcium Supplements on Lumbar Spine Bone Mineral Density

NCT00205036
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 27, 2016 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Natural Supplements for Unipolar Depression

NCT00226356
View directory record Official record
Conditions
Unipolar Depression
Interventions
Supplements of L-methionine, betaine and folate
Drug
Lead sponsor
Cambridge Health Alliance
Other
Eligibility
18 Years to 64 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2008
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 10, 2026, 9:23 AM EDT
Terminated No phase listed Observational

Long-term Study in US Cystic Fibrosis Patients Receiving Digestive Enzyme Supplements to Assess Narrowing of the Large Intestine Causing Adverse Intestinal Symptoms (Fibrosing Colonopathy)

NCT01652157
View directory record Official record
Conditions
Fibrosing Colonopathy
Interventions
ULTRESA, PANCREAZE, CREON, ZENPEP, other non-sponsor pancreatic enzyme replacement therapy, PERTZYE, No pancreatic enzyme replacement therapy
Biological · Other
Lead sponsor
AbbVie
Industry
Eligibility
0 Months to 99 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2020
U.S. locations
123
States / cities
Birmingham, Alabama • Anchorage, Alaska • Phoenix, Arizona + 102 more
Source: ClinicalTrials.gov public record
Updated Mar 21, 2021 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Iron Supplementation Among Low-Income Postpartum Women

NCT00207610
View directory record Official record
Conditions
Anemia
Interventions
Daily iron supplements of 65 mg a day for 3 months, Universal anemia screening and treatment, Selective anemia screening and treatment
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
13 Years and older · Female only
Enrollment
959 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2007
U.S. locations
1
States / cities
Hattiesburg, Mississippi
Source: ClinicalTrials.gov public record
Updated Feb 2, 2009 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Phase 3 Interventional

VITAL - VITamins to Slow ALzheimer's Disease (Homocysteine Study)

NCT00056225
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
Folate, Vitamin B6, Vitamin B12
Drug
Lead sponsor
National Institute on Aging (NIA)
NIH
Eligibility
55 Years and older
Enrollment
340 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
38
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Sun City, Arizona + 29 more
Source: ClinicalTrials.gov public record
Updated Jun 11, 2009 · Synced Sep 10, 2026, 9:23 AM EDT
Not listed Not applicable Interventional

Supplemental Adjuvants for Intracellular Nutrition and Treatment

NCT00893724
View directory record Official record
Conditions
Neovascular Age-related Macular Degeneration, Diabetic Macular Edema
Interventions
Neutral pills with no medicinal effect, Inosine; Tocopherols, Tocotrienol, CoQ10 combination capsule; Niacinamide SR; Viatmin C; N-acetyl Cysteine; Complete Multivitamin with all minerals, Inosine; Tocopherol, Tocotrienol, CoQ10 combination capsule; Niacinamide; Vitamin C; N-acetyl Cysteine; Complete Multivitamin with all minerals; Minocycline
Drug · Dietary Supplement
Lead sponsor
Mid-Atlantic Retina Consultations, Inc.
Other
Eligibility
Not listed
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Jul 19, 2011 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Phase 1 Interventional

Vitamin E Supplements in Treating Patients Undergoing Surgery for Colorectal Cancer

NCT00905918
View directory record Official record
Conditions
Colorectal Cancer
Interventions
vitamin E, laboratory biomarker analysis
Dietary Supplement · Other
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 29, 2014 · Synced Sep 10, 2026, 9:23 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Oral Nutrition Impact on Tear Film

NCT01561040
View directory record Official record
Conditions
Dry Eye Syndrome
Interventions
Omega 3, Vitamins A, D3 and E
Dietary Supplement
Lead sponsor
Eye and Vision Technologies and Research Institute
Network
Eligibility
18 Years to 79 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
4
States / cities
Conifer, Colorado • Oak Lawn, Illinois • Lexington, Kentucky + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 25, 2012 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Phase 2 Interventional Results available

Melatonin Supplements for Improving Sleep in Individuals With Hypertension

NCT00238108
View directory record Official record
Conditions
Sleep Disorders, Hypertension
Interventions
Melatonin, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
35 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 13, 2017 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Guided Metabolic Detox Program

NCT06061289
View directory record Official record
Conditions
Detoxification Response
Interventions
SP Detox Program
Dietary Supplement
Lead sponsor
Standard Process Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Bloomington, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Sep 10, 2026, 9:23 AM EDT
Not yet recruiting Not applicable Interventional

Comparing Prebiotic Fiber Supplements for Gut Health and Digestive Comfort

NCT07525180
View directory record Official record
Conditions
Healthy Participants
Interventions
LOAM, Inulin, Cellulose Placebo
Dietary Supplement
Lead sponsor
Ventoscity LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Short-Term Rhodiola Rosea for Anaerobic Performance and Cognitive Function in Resistance-Trained Adults

NCT07225413
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Rhodiola rosea (low dose), Rhodiola rosea (high dose), Placebo capsules
Dietary Supplement
Lead sponsor
Jacksonville State University
Other
Eligibility
18 Weeks to 40 Weeks
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Jacksonville, Alabama
Source: ClinicalTrials.gov public record
Updated Nov 5, 2025 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Comparison of Changes in Bone Density With the Same Bone-health Plan, But With Different Bone-health Supplements

NCT01114685
View directory record Official record
Conditions
Osteopenia
Interventions
AlgaeCal-1, AlgaeCal-2
Dietary Supplement
Lead sponsor
Integrative Health Technologies, Inc.
Network
Eligibility
18 Years and older
Enrollment
354 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2010
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated May 2, 2010 · Synced Sep 10, 2026, 9:23 AM EDT
Withdrawn Not applicable Interventional

Antiorbital Calcium in Chronic Conditions

NCT05302713
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
Ionic Calcium, Calcium Carbonate
Dietary Supplement
Lead sponsor
National University of Natural Medicine
Other
Eligibility
55 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 6, 2024 · Synced Sep 10, 2026, 9:23 AM EDT
Recruiting Not applicable Interventional

Efficacy of Viome's Precision Nutrition Program Towards Reducing HbA1c

NCT05465616
View directory record Official record
Conditions
Diabetes, Pre Diabetes
Interventions
Viome's Precision Nutrition Program (VPNP)
Dietary Supplement
Lead sponsor
Viome
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Bothell, Washington
Source: ClinicalTrials.gov public record
Updated Jan 23, 2025 · Synced Sep 10, 2026, 9:23 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

The Benefits of Natural Medicine, Vitamin IV Therapy and Supplements: Maintaining Good Health Through Nature

NCT05067998
View directory record Official record
Conditions
Anxiety Disorders and Symptoms, Fibromyalgia, Arthritis, Chronic Pain, Hypertension,Essential
Interventions
IV Vitamin Infused Therapy Treatment, Herbal medicine
Dietary Supplement · Drug
Lead sponsor
Faith A. Richardson
Other
Eligibility
21 Years to 80 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Dover, Delaware
Source: ClinicalTrials.gov public record
Updated Sep 22, 2025 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Phase 3 Interventional

Comparison of Nutritional Supplements in Preventing Weight Loss in Patients With Cancer

NCT00053053
View directory record Official record
Conditions
Cachexia, Lymphoma, Lymphoproliferative Disorder, Unspecified Adult Solid Tumor, Protocol Specific
Interventions
Juven, Non-Juven Supplement
Dietary Supplement
Lead sponsor
Radiation Therapy Oncology Group
Network
Eligibility
17 Years to 120 Years
Enrollment
472 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2009
U.S. locations
230
States / cities
Birmingham, Alabama • Huntsville, Alabama • Mobile, Alabama + 181 more
Source: ClinicalTrials.gov public record
Updated Dec 7, 2016 · Synced Sep 10, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Supplements on Stress Markers

NCT05592561
View directory record Official record
Conditions
Physiological Stress
Interventions
mental stress task
Other
Lead sponsor
Texas State University
Other
Eligibility
18 Years to 40 Years
Enrollment
109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
San Marcos, Texas
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Sep 10, 2026, 9:23 AM EDT