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Showing 1–24 of 95 matching trials from the live ClinicalTrials.gov search.
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Recruiting Phase 3 Interventional

A Trial of Etelcalcetide in Pediatric Participants With Secondary Hyperparathyroidism and Chronic Kidney Disease on Hemodialysis

NCT03633708
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions
Etelcalcetide, Standard of Care
Drug · Other
Lead sponsor
Amgen
Industry
Eligibility
0 Years to 18 Years
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2029
U.S. locations
10
States / cities
Los Angeles, California • Aurora, Colorado • Kansas City, Missouri + 7 more
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Sep 8, 2026, 4:35 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin K to Slow Progression of Dyslipidemia and Diabetes Risk (Vita-K 'n' Kids Study II)

NCT02959762
View directory record Official record
Conditions
Obesity, Insulin Resistance, Obesity in Diabetes, Nutritional and Metabolic Diseases, Hyperlipidemia, Hyperglycemia, Cardiovascular Diseases
Interventions
Placebo-Control, Low-Dose Vitamin K2 (menaquinone-7; 45-mcg/d), High-Dose Vitamin K2 (menaquinone-7; 90 mcg/d)
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
8 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 19, 2019 · Synced Sep 8, 2026, 4:35 AM EDT
Active, not recruiting Phase 2 Interventional Results available

Vitamin D and Physical Activity on Bone Health

NCT01419730
View directory record Official record
Conditions
Bone Metabolism Biomarkers, Bone Mineral Density, Physical Fitness
Interventions
Vitamin D3, Physical Activity
Drug · Behavioral
Lead sponsor
University of Rochester
Other
Eligibility
18 Years to 99 Years · Female only
Enrollment
191 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2026
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Low vs. Moderate to High Dose Vitamin D for Prevention of COVID-19

NCT04868903
View directory record Official record
Conditions
SARS-CoV-2 Infection
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
1,475 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Not applicable Interventional Results available

Treatment of Vitamin D Deficiency in Intestinal Rehabilitation Clinic Patients With a Portable Ultraviolet B Lamp

NCT01930539
View directory record Official record
Conditions
Vitamin D Deficiency, Short Bowel Syndrome
Interventions
Ultraviolet B lamp
Device
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Sep 8, 2026, 4:35 AM 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 24, 2016 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Phase 2 Interventional Results available

The Efficacy, Safety and Tolerability of Oral LPCN 1144 in Subjects With Nonalcoholic Steatohepatitis

NCT04134091
View directory record Official record
Conditions
Nonalcoholic Steatohepatitis (NASH)
Interventions
LPCN 1144 Formulation A, LPCN 1144 Formulation B, Placebo
Drug
Lead sponsor
Lipocine Inc.
Industry
Eligibility
18 Years to 80 Years · Male only
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
19
States / cities
El Cajon, California • Murrieta, California • Rialto, California + 14 more
Source: ClinicalTrials.gov public record
Updated Dec 13, 2023 · Synced Sep 8, 2026, 4:35 AM EDT
Recruiting Phase 2 Interventional

Influence of β-hydroxy β-methyl Butyrate (HMB)Supplementation on Post-operative Muscle Mass and Function in Female Athletes

NCT05869812
View directory record Official record
Conditions
Atrophy
Interventions
CaHMB (Dietary supplement, not Drug), CaLa
Drug · Dietary Supplement
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Mar 1, 2026 · Synced Sep 8, 2026, 4:35 AM EDT
Not listed Not applicable Interventional

Vitamin D in Pediatric Asthma: a Randomized Controlled Open-label Pilot Trial

NCT02054975
View directory record Official record
Conditions
Asthma, Vitamin D Deficiency
Interventions
Vitamin D2 + vitamin D3, Vitamin D3
Drug
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
8 Years to 17 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 7, 2015 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Not applicable Interventional

S0812 High Dose Cholecalciferol in Premenopausal Women at High-Risk for Breast Cancer

NCT01097278
View directory record Official record
Conditions
brca1 Mutation Carrier, brca2 Mutation Carrier, Breast Cancer
Interventions
cholecalciferol, placebo
Dietary Supplement · Other
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
18 Years to 50 Years · Female only
Enrollment
208 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
360
States / cities
Anniston, Alabama • Mobile, Alabama • Anchorage, Alaska + 230 more
Source: ClinicalTrials.gov public record
Updated Nov 23, 2017 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A New Paradigm for Vitamin D Sufficiency

NCT02969850
View directory record Official record
Conditions
New Biomarkers for Measuring Vitamin D Level
Interventions
Vitamin D Supplementation, Placebo, Calcium
Dietary Supplement · Other
Lead sponsor
NYU Langone Health
Other
Eligibility
60 Years to 90 Years · Female only
Enrollment
444 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Oct 21, 2021 · Synced Sep 8, 2026, 4:35 AM 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 Oct 31, 2019 · Synced Sep 8, 2026, 4:35 AM 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 3, 2019 · Synced Sep 8, 2026, 4:35 AM 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 28, 2020 · Synced Sep 8, 2026, 4:35 AM EDT
Terminated Phase 2 Interventional Results available

High Dose Vitamin D vs Standard Dose Vitamin D Study

NCT01988090
View directory record Official record
Conditions
Breast Cancer
Interventions
800 IU Vitamin D Supplement, 50,000 IU Vitamin D supplement
Drug
Lead sponsor
Mothaffar Rimawi
Other
Eligibility
18 Years and older · Female only
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
2
States / cities
St Louis, Missouri • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 8, 2021 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Vitamin D to ENhance TraUma REcovery

NCT05458024
View directory record Official record
Conditions
Musculoskeletal Pain
Interventions
Vitamin D 2, Vitamin D2 Placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 65 Years
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
4
States / cities
Worcester, Massachusetts • St Louis, Missouri • Camden, New Jersey + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 27, 2025 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Vitamin D Status on Bones in Breastfed Infants

NCT00697294
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Tri-Vi-Sol
Dietary Supplement
Lead sponsor
Baylor College of Medicine
Other
Eligibility
Up to 2 Hours
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
3
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 4, 2011 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Micronutrients to Prevent Noise-induced Hearing Loss

NCT00808470
View directory record Official record
Conditions
Noise-Induced Hearing Loss
Interventions
beta-carotene, vitamins C and E, magnesium, Placebo
Drug · Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 35 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated May 18, 2017 · Synced Sep 8, 2026, 4:35 AM EDT
Terminated Phase 4 Interventional Results available

Thiazolidinedione Intervention With Vitamin D Evaluation

NCT00879970
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
pioglitazone, rosiglitazone, placebo, Vitamin D, Placebo
Drug · Dietary Supplement
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
50 Years and older
Enrollment
1,332 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
23
States / cities
Long Beach, California • Los Angeles, California • Northridge, California + 19 more
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 8, 2026, 4:35 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

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

NCT01972113
View directory record Official record
Conditions
Obesity, Insulin Resistance, Insulin Sensitivity, Prediabetes, Dyslipidemia, Diabetes
Interventions
Placebo-Control, Low-Dose Vitamin K2 (menaquinone-7; 45 mcg/d), High-Dose Vitamin K2 (menaquinone-7; 90 mcg/d)
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
8 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2020
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 18, 2019 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children

NCT01050387
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
6 Months to 6 Years
Enrollment
193 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 4, 2014 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Phase 2 Interventional Results available

Phase 2 Safety and Efficacy Study of a Vitamin D Compound (DP001) in Postmenopausal Women With Low Bone Mineral Density

NCT00715676
View directory record Official record
Conditions
Osteoporosis
Interventions
Placebo, DP001
Drug
Lead sponsor
Deltanoid Pharmaceuticals
Industry
Eligibility
55 Years to 80 Years · Female only
Enrollment
157 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
9
States / cities
Upland, California • Indianapolis, Indiana • Bethesda, Maryland + 6 more
Source: ClinicalTrials.gov public record
Updated Jan 10, 2010 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Vitamin D and Osteoporosis Prevention in Elderly African American Women

NCT01153568
View directory record Official record
Conditions
Determine Effect of Vitamin D on Bone Health in Elderly African American Women
Interventions
Vitamin D 3, placebo
Dietary Supplement · Other
Lead sponsor
Winthrop University Hospital
Other
Eligibility
60 Years and older · Female only
Enrollment
260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2016
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Oct 2, 2018 · Synced Sep 8, 2026, 4:35 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Pharmacokinetics of a Single Large Dose of Vitamin D3

NCT00473239
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol.
Drug
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated May 3, 2015 · Synced Sep 8, 2026, 4:35 AM EDT