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Showing 1–24 of 69 matching trials from the live ClinicalTrials.gov search.
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Completed Not applicable Interventional Accepts healthy volunteers

Evaluating the Effect of a Supplement on Symptoms of Hormonal Imbalance.

NCT06535698
View directory record Official record
Conditions
Women's Health
Interventions
Perelel Health Hormonal Balance Support
Dietary Supplement
Lead sponsor
Perelel Inc.
Industry
Eligibility
18 Years and older · Female only
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Aug 1, 2024 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 3 Interventional Results available

Heartland Osteoporosis Prevention Study

NCT02186600
View directory record Official record
Conditions
Osteopenia
Interventions
Calcium Carbonate, Vitamin D3, Risedronate, Bone-loading exercises
Drug · Behavioral
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older · Female only
Enrollment
276 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 4, 2023 · Synced Sep 3, 2026, 5:17 AM EDT
Recruiting Not applicable Interventional

Metabolic Mechanisms Induced by Enteral DHA and ARA Supplementation in Preterm Infants

NCT05380401
View directory record Official record
Conditions
Premature
Interventions
Enfamil® DHA & ARA Supplement for Special Dietary Use
Dietary Supplement
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
Up to 36 Weeks
Enrollment
328 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
7
States / cities
Los Angeles, California • New Haven, Connecticut • Chicago, Illinois + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 23, 2025 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Prebiotic and Probiotic Modulation of the Gut Microbiota-gut-brain Axis During Acute Stress

NCT05392556
View directory record Official record
Conditions
Stress Physiology
Interventions
Probiotic, Prebiotic, Placebo
Dietary Supplement · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years to 39 Years
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 25, 2025 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Optimization of Blood Levels of 25(OH)-Vitamin D in African Americans

NCT04939792
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D, Placebo, Vitamin D + L-cysteine, L-cysteine
Drug
Lead sponsor
Louisiana State University Health Sciences Center Shreveport
Other
Eligibility
18 Years to 65 Years
Enrollment
165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Shreveport, Louisiana
Source: ClinicalTrials.gov public record
Updated Jun 7, 2023 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Not applicable Interventional

Using D-Galactose as a Food Supplement in Congenital Disorders of Glycosylation

NCT02955264
View directory record Official record
Conditions
Congenital Disorders of Glycosylation
Interventions
D-Galactose
Dietary Supplement
Lead sponsor
Tulane University
Other
Eligibility
Up to 21 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Jan 7, 2021 · Synced Sep 3, 2026, 5:17 AM EDT
Withdrawn Phase 1 Interventional

Dexamethasone/Pancreatic Clamp P&F

NCT06126354
View directory record Official record
Conditions
Insulin Resistance, Prediabetic State, Non-Alcoholic Fatty Liver Disease, Overweight and Obesity
Interventions
Insulin human, Octreotide Acetate, Glucagon, Human Growth Hormone, Dexamethasone Oral, [6,6-2H2] D-glucose, 20% D-glucose (aq), BOOST Plus, Harvard Apparatus PHD ULTRA CP syringe pump, Yellow Springs Instruments (YSI) 2500 Biochemistry Glucose/Lactate Analyzer, Normal saline, Human albumin
Drug · Other · Dietary Supplement + 1 more
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 9, 2024 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Early Phase 1 Interventional

Oral Ketones and Exercise Among Patients With Long-chain Fatty Acid Oxidation Disorders

NCT05411835
View directory record Official record
Conditions
Long-chain 3-hydroxyacyl-CoA Dehydrogenase Deficiency, Carnitine Palmitoyltransferase Deficiency 2, Very Long Chain Acyl Coa Dehydrogenase Deficiency, Trifunctional Protein Deficiency
Interventions
Nutritional Ketone Supplement, Isocaloric Placebo Supplement
Dietary Supplement
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 1, 2024 · Synced Sep 3, 2026, 5:17 AM EDT
Enrolling by invitation Not applicable Interventional

Physiological Effects of N-Acetyl Cysteine in Patients With Multiple Sclerosis

NCT03032601
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
N-acetyl Cysteine
Dietary Supplement
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 3 Interventional

Anit-Inflammatory and Anti-Oxidative Nutrition in Dialysis Patients

NCT00561093
View directory record Official record
Conditions
Hypoalbuminemia, Protein-energy Malnutrition, Inflammation, Oxidative Stress, Chronic Kidney Disease (CKD) Hemodialysis
Interventions
pentoxiphylline, Nepro, anti-inflammatory module (similar to Oxepa), Placebo pill imitating pentoxiphylline, Placebo to imitate Nepro, Placebo to imitate anti-inflammatory module (similar to Oxepa)
Drug · Dietary Supplement
Lead sponsor
Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center
Other
Eligibility
18 Years to 85 Years
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
2
States / cities
Irvine, California • Torrance, California
Source: ClinicalTrials.gov public record
Updated May 20, 2015 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D Dose Finding Study

NCT01092338
View directory record Official record
Conditions
HIV Infections, AIDS
Interventions
Cholecalciferol (Vit D3)
Drug
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
5 Years to 24 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 17, 2013 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Not applicable Interventional

Correlative Analysis of the Genomics of Vitamin D and Omega-3 Fatty Acid Intake in Prostate Cancer

NCT03290417
View directory record Official record
Conditions
Prostate Cancer
Interventions
Vitamin D, Omega-3, Turmeric
Dietary Supplement
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
Male only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 17, 2020 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 2 Interventional

Effect of Vitamin D Supplementation on Hemoglobin A1c

NCT01354262
View directory record Official record
Conditions
Diabetes Mellitus, Vitamin D Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Ascension Health
Industry
Eligibility
34 Years to 69 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Flint, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 22, 2015 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 3 Interventional

Vitamin D for Enhancing the Immune System in Cystic Fibrosis (DISC Study)

NCT01426256
View directory record Official record
Conditions
Cystic Fibrosis, Respiratory Tract Infections
Interventions
Cholecalciferol
Dietary Supplement
Lead sponsor
Emory University
Other
Eligibility
16 Years and older
Enrollment
91 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
5
States / cities
Birmingham, Alabama • Atlanta, Georgia • Iowa City, Iowa + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2017 · Synced Sep 3, 2026, 5:17 AM EDT
Terminated Not applicable Interventional

The Pittsburgh Vitamin D Study: Vitamin D Supplementation in Vitamin D-deficient Subjects at Risk of Lung Cancer

NCT02532062
View directory record Official record
Conditions
Deficiency of Vitamin D3, COPD
Interventions
Cholecalciferol, multivitamin, Placebo
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
50 Years to 85 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 25, 2018 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 3 Interventional Results available

Anemia Studies in Chronic Kidney Disease: Erythropoiesis Via a Novel Prolyl Hydroxylase Inhibitor Daprodustat-Dialysis (ASCEND-D)

NCT02879305
View directory record Official record
Conditions
Anaemia, Aspergillosis, Allergic Bronchopulmonary
Interventions
Daprodustat, rhEPO, Placebo, Iron therapy
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 99 Years
Enrollment
2,964 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
126
States / cities
Huntsville, Alabama • Pine Bluff, Arkansas • Anaheim, California + 103 more
Source: ClinicalTrials.gov public record
Updated Dec 2, 2021 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Pilot Study of OMEGA-3 and Vitamin D in High-Dose in Type I Diabetic Patients

NCT03406897
View directory record Official record
Conditions
Diabetes Mellitus, Type 1, Hypoglycemia, Diabetes Mellitus, Diabetes, Autoimmune
Interventions
Cholecalciferol, Omega 3 fatty acid
Drug
Lead sponsor
Rodolfo Alejandro
Other
Eligibility
6 Years to 65 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Sep 3, 2026, 5:17 AM EDT
Recruiting Phase 2 Interventional

Essential Amino Acid Supplementation for Femoral Fragility Fractures

NCT06050668
View directory record Official record
Conditions
Femoral Fracture, Fragility Fracture, Muscle Atrophy
Interventions
Essential Amino Acid Supplementation
Combination Product
Lead sponsor
Michael C Willey
Other
Eligibility
65 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
2
States / cities
Iowa City, Iowa • Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 2 Interventional Results available

Effects of an Antioxidant-Enriched Multivitamin Supplement on Inflammation and Oxidative Stress in Cystic Fibrosis

NCT01859390
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
AquADEKs-2, control multivitamin
Drug · Dietary Supplement
Lead sponsor
University of Colorado, Denver
Other
Eligibility
10 Years and older
Enrollment
73 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
15
States / cities
Tucson, Arizona • Aurora, Colorado • Orlando, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2017 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 4 Interventional Results available

Sitagliptin in Non-Diabetic Patients Undergoing Cardiac Surgery

NCT02443402
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Sitagliptin, Placebo, Regular Human Insulin, Insulin glargine, Supplemental insulin (Insulin lispro), Supplemental insulin (Insulin aspart)
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 80 Years
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
4
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 5, 2018 · Synced Sep 3, 2026, 5:17 AM EDT
Terminated Phase 2 Interventional

Vitamin D Supplementation for Adults With Neurofibromatosis Type 1 (NF1)

NCT01968590
View directory record Official record
Conditions
Neurofibromatosis Type 1 (NF1)
Interventions
Cholecalciferol
Drug
Lead sponsor
University of Utah
Other
Eligibility
25 Years to 40 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
2
States / cities
Cincinnati, Ohio • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 24, 2022 · Synced Sep 3, 2026, 5:17 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Calcium-Rich Food Versus Calcium Carbonate for Bone Health

NCT07763509
View directory record Official record
Conditions
Osteopenia, Osteoporosis, Bone Health in Perimenopausal Women, Menopause Related Conditions, Fracture Healing
Interventions
500 mg calcium from milk-derived minerals, Calcium Carbonate 500 MG
Other · Dietary Supplement
Lead sponsor
Cornell University
Other
Eligibility
40 Years to 90 Years · Female only
Enrollment
217 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Magnesium and Vitamin D Supplementation and Cardiometabolic Outcomes

NCT03134417
View directory record Official record
Conditions
Overweight and Obesity, Vitamin D Deficiency, Magnesium Deficiency, Cardiovascular Risk Factor
Interventions
Vitamin D and magnesium, Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Drexel University
Other
Eligibility
30 Years to 70 Years
Enrollment
109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 26, 2021 · Synced Sep 3, 2026, 5:17 AM EDT
Completed Phase 4 Interventional Results available

Evaluating Vitamin D3 Supplement on Post-Op Outcomes

NCT04177758
View directory record Official record
Conditions
Knee Osteoarthritis
Interventions
Vitamin D, Control
Drug
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
137 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Sep 3, 2026, 5:17 AM EDT