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ClinicalTrials.gov public records Last synced Sep 30, 2026, 11:11 PM EDT

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Showing 49–72 of 95 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D control dose Clear all
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D for Painful Nocturnal Leg Cramps

NCT00715429
View directory record Official record
Conditions
Leg Cramps, Nocturnal
Interventions
vitamin d, placebo
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
50 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 17, 2019 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Safety/Efficacy Study of CTAP101 in Chronic Kidney Disease Subjects With Secondary Hyperparathyroidism (SHPT)

NCT01219855
View directory record Official record
Conditions
Chronic Kidney Disease, Secondary Hyperparathyroidism, Vitamin D Insufficiency
Interventions
Cohort 1 CTAP101 Capsules- 60µg, Cohort 1 CTAP101 Capsules - 90µg, Cohort 1 Matching Sugar Capsule, Cohort 2 CTAP101 Capsules - 30µg, Cohort 2 Matching Sugar Capsule
Drug
Lead sponsor
OPKO Health, Inc.
Industry
Eligibility
18 Years to 85 Years
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Bannockburn, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 25, 2016 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Not applicable Interventional Results available

Oral Paricalcitol in Kidney Transplant Recipients

NCT00587158
View directory record Official record
Conditions
Transplant; Failure, Kidney, Renal Disease, End Stage, Hyperparathyroidism, Secondary
Interventions
Paricalcitol, Corticosteroid Avoidance Immune Suppression Protocol
Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
2
States / cities
Scottsdale, Arizona • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 13, 2013 · Synced Sep 30, 2026, 11:11 PM EDT
Terminated Phase 4 Interventional Results available

Mothers' Own Milk Optimization for Preterm Infants Project (MoMO PIP) Pilot Study

NCT04629534
View directory record Official record
Conditions
Vitamin D Deficiency, Nutritional Deficiency
Interventions
High dose Cholecalciferol, Cholecalciferol
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
0 Days to 45 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Mar 15, 2023 · Synced Sep 30, 2026, 11:11 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Independent and Combined Effects of Resistance Exercise Training and β-hydroxy β-methylbutyrate Plus Vitamin D

NCT03848741
View directory record Official record
Conditions
Aging, Skeletal Muscle
Interventions
Non-Exercise Control, Resistance Exercise Training, Placebo, HMB+VitD
Behavioral · Dietary Supplement
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
45 Years to 60 Years · Female only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 17, 2019 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Phase 3 Interventional Results available

Vitamin D Supplementation in Multiple Sclerosis

NCT01490502
View directory record Official record
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
Vitamin D3
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 50 Years
Enrollment
172 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2021
U.S. locations
16
States / cities
Carmichael, California • San Francisco, California • Stanford, California + 12 more
Source: ClinicalTrials.gov public record
Updated Sep 28, 2022 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Phase 2 Interventional Results available

The Effect of Paricalcitol Capsules on Reducing Albuminuria in Patients With Type 2 Diabetic Nephropathy Being Treated With Renin-angiotensin System Inhibitors

NCT00421733
View directory record Official record
Conditions
Diabetic Nephropathy, Chronic Kidney Disease
Interventions
Zemplar (paricalcitol) capsules, Placebo
Drug
Lead sponsor
Abbott
Industry
Eligibility
20 Years and older
Enrollment
281 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
27
States / cities
Phoenix, Arizona • Fountain Valley, California • Yuba City, California + 21 more
Source: ClinicalTrials.gov public record
Updated Jan 20, 2012 · Synced Sep 30, 2026, 11:11 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin K and Glucose Metabolism in Adults at Risk for Diabetes (Vita-K 'n' Adults Study)

NCT02366481
View directory record Official record
Conditions
Obesity, Insulin Resistance, Insulin Sensitivity, Beta-Cell Dysfunction, Prediabetes
Interventions
Placebo, Low-Dose Vitamin K2 Supplement (menaquinone-7; 90-mcg/d), High-Dose Vitamin K2 Supplement (menaquinone-7; 180-mcg/d)
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 20, 2019 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Not applicable Interventional

High-dose Vitamin D Supplementation for ADT-induced Side Effects

NCT02064946
View directory record Official record
Conditions
Prostatic Neoplasms, Bone Mineral Density Quantitative Trait Locus 3
Interventions
vitamin D, Placebo
Dietary Supplement
Lead sponsor
University of Rochester
Other
Eligibility
60 Years to 99 Years · Male only
Enrollment
108 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 8, 2019 · Synced Sep 30, 2026, 11:11 PM 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 17, 2025 · Synced Sep 30, 2026, 11:11 PM EDT
Active, not recruiting Phase 2Phase 3 Interventional

Short-course Regimens for the Treatment of Pulmonary Tuberculosis

NCT05766267
View directory record Official record
Conditions
Tuberculosis, Pulmonary, Tuberculosis Infection
Interventions
Rifabutin, Delamanid, Bedaquiline, Moxifloxacin, Pyrazinamide, Isoniazid, Rifampin, Ethambutol
Drug
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
12 Years and older
Enrollment
288 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

To Study the Nutri-Genomic Response of Vit-D Supplementation in African-Americans

NCT02802449
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
25 Hydroxy- Vitamin D3 [25 (OH) D3], Placebo
Drug
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
18 Years to 70 Years
Enrollment
330 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 15, 2019 · Synced Sep 30, 2026, 11:11 PM EDT
Withdrawn Phase 1Phase 2 Interventional

High Dose Cholecalciferol to Reduce the Incidence of Gestational Diabetes in High Risk Pregnant Women

NCT03037593
View directory record Official record
Conditions
Gestational Diabetes
Interventions
4000 IU vitamin D3
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 1, 2019 · Synced Sep 30, 2026, 11:11 PM EDT
Terminated Phase 3 Interventional Results available

Efficacy and Safety of Cinacalcet in Pediatric Patients With Secondary Hyperparathyroidism (SHPT) and Chronic Kidney Disease (CKD) on Dialysis

NCT02138838
View directory record Official record
Conditions
Chronic Kidney Disease, Secondary Hyperparathyroidism
Interventions
Cinacalcet HCl, Standard of Care
Drug · Dietary Supplement
Lead sponsor
Amgen
Industry
Eligibility
6 Years to 17 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
26
States / cities
Los Angeles, California • Wilmington, Delaware • Atlanta, Georgia + 22 more
Source: ClinicalTrials.gov public record
Updated Jun 29, 2020 · Synced Sep 30, 2026, 11:11 PM EDT
Suspended Phase 1Phase 2 Interventional

Vitamin D and Bone Homeostasis in Ortho Polytrauma Patients

NCT03066817
View directory record Official record
Conditions
Vitamin D Deficiency, Polytrauma, Orthopedic Disorder
Interventions
Ergocalciferol 8000 IU/ML Oral Liquid [DRISDOL], Propylene Glycol
Drug
Lead sponsor
New York City Health and Hospitals Corporation
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Apr 4, 2019 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Changes in Biomarkers Using Prostaglandin Inhibitors

NCT01769625
View directory record Official record
Conditions
Biomarker Change Linked to Breast Cancer
Interventions
placebo/celecoxib 400 mg and cholecalciferol 400 IU/cholecalciferol 2,000 IU
Drug
Lead sponsor
Hartford Hospital
Other
Eligibility
18 Years and older · Female only
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2016
U.S. locations
1
States / cities
Grand Forks, North Dakota
Source: ClinicalTrials.gov public record
Updated Aug 9, 2017 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Not applicable Interventional

Randomized Trial of Regenexx Stem Cell Support Formula

NCT04661267
View directory record Official record
Conditions
Knee Osteoarthritis
Interventions
Stem Cell Support Formula, Placebo
Dietary Supplement
Lead sponsor
Regenexx, LLC
Industry
Eligibility
18 Years to 80 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
2
States / cities
Broomfield, Colorado • Lone Tree, Colorado
Source: ClinicalTrials.gov public record
Updated Dec 28, 2022 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Phase 3 Interventional Results available

Zoledronate in Preventing Osteoporosis and Bone Fractures in Patients With Locally Advanced Nonmetastatic Prostate Cancer Undergoing Radiation Therapy and Hormone Therapy

NCT00329797
View directory record Official record
Conditions
Osteoporosis, Prostate Cancer
Interventions
Calcium, Zoledronic acid, radiation therapy, LHRH, Vitamin D
Dietary Supplement · Radiation · Drug
Lead sponsor
Radiation Therapy Oncology Group
Network
Eligibility
18 Years and older · Male only
Enrollment
109 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2014
U.S. locations
80
States / cities
Chico, California • Los Angeles, California • Pomona, California + 66 more
Source: ClinicalTrials.gov public record
Updated Nov 29, 2017 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Vitamins C and Vitamin E and Cardiovascular Risk

NCT00362518
View directory record Official record
Conditions
Diabetes
Interventions
Study Arm A, Study Arm B, Study Arm C, Study Arm D
Dietary Supplement
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years to 75 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2008
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Mar 12, 2024 · Synced Sep 30, 2026, 11:11 PM EDT
Terminated Phase 3 Interventional Results available

Pediatric Chronic Kidney Disease Safety and Efficacy

NCT01277510
View directory record Official record
Conditions
Chronic Kidney Disease, Hyperparathyroidism, Hyperparathyroidism, Secondary, Kidney Disease, Secondary Hyperparathyroidism
Interventions
cinacalcet capsule, placebo, Standard of Care
Drug
Lead sponsor
Amgen
Industry
Eligibility
6 Years to 17 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2011
U.S. locations
18
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 14 more
Source: ClinicalTrials.gov public record
Updated Jun 29, 2020 · Synced Sep 30, 2026, 11:11 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

Vitamin D Status, Disease Specific and Quality of Life Outcomes in Patients With Cutaneous Lupus

NCT01498406
View directory record Official record
Conditions
Cutaneous Lupus Erythematosus
Interventions
vitamin D
Dietary Supplement
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 20, 2013 · Synced Sep 30, 2026, 11:11 PM EDT
Recruiting Not applicable Interventional

Elucidating the Minimal Effective Dose of Prunes for Bone Health in Postmenopausal Women

NCT06184646
View directory record Official record
Conditions
Bone Disease, Metabolic
Interventions
Prune
Dietary Supplement
Lead sponsor
San Diego State University
Other
Eligibility
Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Not applicable Interventional

Acute Effect of Systemic Stress on Measured Blood Concentrations of 25 (OH) Vitamin D

NCT02460211
View directory record Official record
Conditions
Cardiovascular Disease, Vitamin D Deficiency
Interventions
Vitamin D3, Placebo
Dietary Supplement
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Murray, Utah
Source: ClinicalTrials.gov public record
Updated Apr 5, 2021 · Synced Sep 30, 2026, 11:11 PM EDT
Completed Phase 2 Interventional Results available

Zoledronic Acid in Preventing Osteoporosis in Patients Undergoing Donor Stem Cell Transplant

NCT00321932
View directory record Official record
Conditions
Leukemia, Lymphoma, Myelodysplastic Syndromes, Osteoporosis, Ovarian Cancer
Interventions
calcium, cholecalciferol, zoledronic acid
Dietary Supplement · Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
2
States / cities
Minneapolis, Minnesota • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 9, 2017 · Synced Sep 30, 2026, 11:11 PM EDT