Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.

Clear filters

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Oct 12, 2026, 3:22 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 217–240 of 415 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Deficiency Diseases Vitamin Clear all
Active, not recruiting No phase listed Observational

Vitamin A Status in Patients With Vocal Fold Leukoplakia

NCT05323292
View directory record Official record
Conditions
Vitamin A, Vitamin A Deficiency, Leukoplakia, Vocal Cord Neoplasm
Interventions
Not listed
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 17, 2026 · Synced Oct 12, 2026, 3:22 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Metformin Use and Vitamin B12 Deficiency

NCT01136512
View directory record Official record
Conditions
Vitamin B12 Deficiency, Type 2 Diabetes Mellitus
Interventions
Not listed
Lead sponsor
Northwell Health
Other
Eligibility
20 Years to 80 Years
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Staten Island, New York
Source: ClinicalTrials.gov public record
Updated Jul 31, 2013 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Not applicable Interventional Results available

Impact of Vitamin D Repletion in Hemodialysis Patients

NCT01175798
View directory record Official record
Conditions
Vitamin D Deficiency, End-stage Renal Disease
Interventions
Cholecalciferol
Drug
Lead sponsor
Mehrotra, Anita, M.D.
Individual
Eligibility
18 Years and older
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 22, 2014 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Solius UV Light Source in Improving Serum Levels of 25-hydroxyvitamin D

NCT04865432
View directory record Official record
Conditions
Vitamin D Deficiency, Vitamin D Insufficiency
Interventions
UVB treatment
Device
Lead sponsor
Boston University
Other
Eligibility
22 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 23, 2022 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Vitamin D Supplementation in RNA-seq Profiles of Single-core Prostate Samples, Among Veterans

NCT04621500
View directory record Official record
Conditions
Prostate Cancer, Vitamin D Deficiency, Stress Reaction
Interventions
cholecalciferol, Standard of Care Prostate Biopsy - collection of 13th core for RNA-seq, Standard of Care Prostate Biopsies at baseline and after one year vitamin D3 supplementation, Allostatic Load
Drug · Procedure · Diagnostic Test
Lead sponsor
Medical University of South Carolina
Other
Eligibility
50 Years to 75 Years · Male only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 4, 2025 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Randomized Controlled Trial Testing The Effect Of A Multi-Nutrient Fortified Juice

NCT01909063
View directory record Official record
Conditions
Vitamin D Deficiency, Hypovitaminosis A, Vitamin E Deficiency
Interventions
Vitamin D, Vitamin D, Vitamin E, and Vitamin A, Control, 700 mg Calcium
Dietary Supplement
Lead sponsor
Boston University
Other
Eligibility
6 Years to 10 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 28, 2017 · Synced Oct 12, 2026, 3:22 AM 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 Oct 12, 2026, 3:22 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Vitamin D Versus Placebo in the Treatment of Vague Musculoskeletal Pain in Children

NCT00944606
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Vitamin D, Placebo candy
Dietary Supplement · Other
Lead sponsor
University of New Mexico
Other
Eligibility
5 Years to 14 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Mar 1, 2012 · Synced Oct 12, 2026, 3:22 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Retrospective Analysis of Neevo®/Neevo®DHA Compared to a Standard Prenatal Vitamin in Anemia During Pregnancy

NCT01062958
View directory record Official record
Conditions
Anemia in Pregnancy, Preeclampsia
Interventions
Neevo® (a medical food), Prenatal vitamins (≤1mg folic acid, 27 - 35mg iron, and ≤12mcg vitamin B12)
Other
Lead sponsor
Pamlab, Inc.
Industry
Eligibility
21 Years to 39 Years · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
3
States / cities
Sheffield, Alabama • Flowood, Mississippi • Gainesville, Texas
Source: ClinicalTrials.gov public record
Updated Apr 16, 2013 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of a Meal on Vitamin D Absorption

NCT01268176
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
50 Years to 69 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 13, 2013 · Synced Oct 12, 2026, 3:22 AM EDT
Completed No phase listed Observational

Catheterization to Locate Mesenchymal Tumors in Patients With Tumor-Induced Osteomalacia or Oncogenic Osteomalacia

NCT00099762
View directory record Official record
Conditions
Osteomalacia, Neoplasms
Interventions
Not listed
Lead sponsor
National Institute of Dental and Craniofacial Research (NIDCR)
NIH
Eligibility
8 Years to 100 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 12, 2026, 3:22 AM EDT
Not listed Early Phase 1 Interventional Accepts healthy volunteers

Periodontal and Cardiometabolic Responses to Vitamin D Intervention in African Americans With Periodontal Disease

NCT02337257
View directory record Official record
Conditions
Periodontal Disease, Vitamin D Deficiency
Interventions
Cholecalciferol, Placebo
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 60 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 13, 2015 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3

NCT04885803
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Softgel Vitamin D3, Nano Liquid Vitamin D3, 25(OH)D Blood Serum Test, Placebo Control
Dietary Supplement · Diagnostic Test · Other
Lead sponsor
Inspired Life Medical, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
114 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Le Sueur, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 24, 2021 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Open-Label Study of Asfotase Alfa in Infants and Children ≤ 5 Years of Age With Hypophosphatasia (HPP)

NCT01176266
View directory record Official record
Conditions
Hypophosphatasia
Interventions
asfotase alfa
Drug
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
1 Minute to 5 Years
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
3
States / cities
Oakland, California • Cincinnati, Ohio • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 13, 2019 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Vitamin D Deficiency and Vitamin D Supplementation on Glucose Metabolism

NCT00749918
View directory record Official record
Conditions
Prediabetes, Vitamin D Deficiency
Interventions
Cholecalciferol (vitamin D3)
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 20, 2008 · Synced Oct 12, 2026, 3:22 AM EDT
Completed No phase listed Observational

Studies of States With Resistance to Vitamin D and Parathyroid Hormone

NCT00001242
View directory record Official record
Conditions
Hypocalcemia, Pseudohypoparathyroidism, Osteomalacia, Rickets, Pseudopseudohpoparathyroidism
Interventions
Not listed
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
2 Months to 100 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 20, 2023 · Synced Oct 12, 2026, 3:22 AM EDT
Terminated Not applicable Interventional

Vitamin D Supplementation in IBS

NCT03148288
View directory record Official record
Conditions
Irritable Bowel Syndrome, Vitamin D Deficiency, Abdominal Pain
Interventions
Vitamin D, placebo
Dietary Supplement
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 6, 2020 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Vitamin D and Arterial Stiffness in Elderly

NCT03649802
View directory record Official record
Conditions
Vitamin D Deficiency, Arterial Stiffness
Interventions
Low dose vitamin D3, High dose vitamin D3
Dietary Supplement
Lead sponsor
Texas Tech University Health Sciences Center
Other
Eligibility
65 Years to 89 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Mar 21, 2022 · Synced Oct 12, 2026, 3:22 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Vitamin D Deficiency in Subjects With Chronic Hepatitis C Compared to Healthy Volunteers

NCT01274013
View directory record Official record
Conditions
Chronic Hepatitis C
Interventions
Not listed
Lead sponsor
Avera McKennan Hospital & University Health Center
Other
Eligibility
20 Years to 60 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2019
U.S. locations
1
States / cities
Sioux Falls, South Dakota
Source: ClinicalTrials.gov public record
Updated Jan 10, 2019 · Synced Oct 12, 2026, 3:22 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Calcimimetics in Hypophosphatemic Rickets

NCT00844740
View directory record Official record
Conditions
Familial Hypophosphatemic Rickets
Interventions
Cinacalcet
Drug
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
5 Years to 21 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 17, 2020 · Synced Oct 12, 2026, 3:22 AM EDT
Not listed No phase listed Observational

Emulated Study of Vitamin D Correction Vs Non-Correction

NCT06366776
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
The Cooper Health System
Other
Eligibility
18 Years and older
Enrollment
9,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Camden, New Jersey
Source: ClinicalTrials.gov public record
Updated Jan 22, 2025 · Synced Oct 12, 2026, 3:22 AM EDT
Terminated Phase 2 Interventional Results available

Thiamine vs. Placebo to Increase Oxygen Consumption After Cardiac Arrest

NCT02974257
View directory record Official record
Conditions
Cardiac Arrest, Shock, Lactic Acidosis, Thiamin Deficiency
Interventions
Thiamine, placebo
Drug · Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 10, 2025 · Synced Oct 12, 2026, 3:22 AM EDT
Completed Phase 2 Interventional Results available

High Dose Intravenous Thiamine for the Prevention of Delirium in Allogeneic Hematopoietic Stem Cell Transplantation

NCT03263442
View directory record Official record
Conditions
Hematopoietic Stem Cell Transplantation, Delirium, Thiamine Deficiency
Interventions
Thiamine, Normal saline
Drug
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 19, 2021 · Synced Oct 12, 2026, 3:22 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin Supplementation After Bariatric Surgery

NCT02686905
View directory record Official record
Conditions
Complications of Bariatric Procedures, Avitaminosis
Interventions
Chewable Multivitamin with Iron, PatchMD Vitamin D3/Calcium Patch, PatchMD Multivitamin Patch, PatchMD B12 Energy Plus Patch, Chewable Calcium, Quick Dissolve B12
Dietary Supplement
Lead sponsor
California State Polytechnic University, Pomona
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Brea, California
Source: ClinicalTrials.gov public record
Updated Sep 30, 2016 · Synced Oct 12, 2026, 3:22 AM EDT