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, 2:40 AM EDT

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

Showing 193–216 of 505 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamins A and D Clear all
Active, not recruiting Not applicable Interventional

The TRIABETES - ARMMS-T2D Study: A Randomized Trial to Compare Surgical and Medical Treatments for Type 2 Diabetes

NCT01047735
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Obesity
Interventions
Roux-en-Y Gastric Bypass Surgery, Laparoscopic Adjustable Gastric Banding, Lifestyle Weight Loss Intervention
Procedure · Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
25 Years to 55 Years
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2028
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Oct 12, 2026, 2:40 AM 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 Oct 12, 2026, 2:40 AM EDT
Completed Phase 3 Interventional Results available

High Dose Preoperative Cholecalciferol Supplementation and Perioperative Vitamin D Status

NCT01689779
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
100,000 IU cholecalciferol, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 28, 2017 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Phase 1 Interventional

Calcitriol Plus Carboplatin in Treating Patients With Advanced Solid Tumors

NCT00008086
View directory record Official record
Conditions
Brain and Central Nervous System Tumors, Unspecified Adult Solid Tumor, Protocol Specific
Interventions
calcitriol, carboplatin
Dietary Supplement · Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2004
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 19, 2013 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Efficacy of a Once Daily Calcium and Vitamin D Fortified Food Product to Improve Bone Microarchitecture

NCT02375503
View directory record Official record
Conditions
Bone Alteration, Dietary Modification
Interventions
Calcium/Vitamin D, Placebo
Dietary Supplement
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years to 42 Years
Enrollment
175 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated May 15, 2017 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Blackcurrants Modify Gut Microbiota and Reduce Osteoporosis and CVD Risk

NCT04431960
View directory record Official record
Conditions
Postmenopausal Osteoporosis, Gut Microbiota, Cardiovascular Diseases
Interventions
blackcurrant (BC) extract
Drug
Lead sponsor
University of Connecticut
Other
Eligibility
45 Years to 60 Years · Female only
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 12, 2025 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Phase 3 Interventional

Calcium With or Without Estrogen and/or Risedronate in Preventing Osteoporosis in Patients With Prostate Cancer

NCT00043069
View directory record Official record
Conditions
Osteoporosis, Prostate Cancer
Interventions
calcium carbonate, cholecalciferol, Estrogen Antagonists, risedronate sodium, placebo
Dietary Supplement · Drug · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Male only
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2010
U.S. locations
112
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Aurora, Illinois + 71 more
Source: ClinicalTrials.gov public record
Updated Dec 7, 2016 · Synced Oct 12, 2026, 2:40 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 23, 2025 · Synced Oct 12, 2026, 2:40 AM EDT
Not listed Phase 2 Interventional

Study of DN-101 (Calcitriol) and Docetaxel in Subjects Previously Enrolled in Studies DN101-002 or DN101-004

NCT00285675
View directory record Official record
Conditions
Androgen Independent Prostate Cancer (AIPC), Non Small Cell Lung Cancer (NSCLC)
Interventions
DN-101 (calcitriol) - Drug
Drug
Lead sponsor
Novacea
Industry
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
11
States / cities
Berkeley, California • San Francisco, California • Vallejo, California + 6 more
Source: ClinicalTrials.gov public record
Updated May 31, 2006 · Synced Oct 12, 2026, 2:40 AM EDT
Completed No phase listed Observational

Vitamin D Replacement in Nonalcoholic Fatty Liver Disease

NCT03084328
View directory record Official record
Conditions
Nonalcoholic Fatty Liver
Interventions
Vitamind D
Dietary Supplement
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
48 participants
Timeline
2012 – 2017
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 13, 2017 · Synced Oct 12, 2026, 2:40 AM EDT
Recruiting Phase 3 Interventional

Dinutuximab With Chemotherapy, Surgery and Stem Cell Transplantation for the Treatment of Children With Newly Diagnosed High Risk Neuroblastoma

NCT06172296
View directory record Official record
Conditions
Ganglioneuroblastoma, Nodular, Neuroblastoma
Interventions
Biospecimen Collection, Bone Marrow Aspiration, Bone Marrow Biopsy, Carboplatin, Cisplatin, Computed Tomography, Cyclophosphamide, Dinutuximab, Doxorubicin, Echocardiography Test, Etoposide, FDG-Positron Emission Tomography and Computed Tomography Scan, Hematopoietic Cell Transplantation, Irinotecan, Isotretinoin, Leukapheresis, Magnetic Resonance Imaging, Melphalan, Multigated Acquisition Scan, Radiation Therapy, Radionuclide Imaging, Survey Administration, Temozolomide, Thiotepa, Topotecan, Tumor Resection, Vincristine
Procedure · Drug · Biological + 2 more
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
Up to 30 Years
Enrollment
478 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
157
States / cities
Birmingham, Alabama • Mobile, Alabama • Mesa, Arizona + 127 more
Source: ClinicalTrials.gov public record
Updated Oct 8, 2026 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Not applicable Interventional Results available

Open-label Vitamin D Trial for Patients With Cystic Fibrosis and Allergic Bronchopulmonary Aspergillosis

NCT01222273
View directory record Official record
Conditions
Cystic Fibrosis, Allergic Bronchopulmonary Aspergillosis
Interventions
cholecalciferol (Vitamin D3)
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
12 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
2
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 29, 2018 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile

NCT01688102
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Oral Vitamin D3, Ultraviolet Light
Dietary Supplement · Radiation
Lead sponsor
Rockefeller University
Other
Eligibility
18 Years to 70 Years
Enrollment
118 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 6, 2017 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Pilot Study of the Effect of Dietary Fat Type and Amount on Vitamin D3 Absorption

NCT01508845
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
50 Years and older
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 21, 2014 · Synced Oct 12, 2026, 2:40 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Clinical Study to Evaluate the Efficacy of Four Supplements on Improving Readiness for Intimacy

NCT05862519
View directory record Official record
Conditions
Libido, Intimacy, Gastrointestinal Issues
Interventions
Reset, Stay Ready Fiber, Libido, Testosterone supplement
Dietary Supplement
Lead sponsor
906 CMVI Holdings
Industry
Eligibility
18 Years to 44 Years · Male only
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated May 17, 2023 · Synced Oct 12, 2026, 2:40 AM EDT
Completed No phase listed Observational Results available

Vitamin D to Improve Outcomes by Leveraging Early Treatment: Long-term Brain Outcomes in Vitamin D Deficient Patients

NCT03733418
View directory record Official record
Conditions
Cognitive Decline
Interventions
540,000 IU vitamin D3, Placebo
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
95 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
7
States / cities
Aurora, Colorado • Boston, Massachusetts • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2024 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Impact of Smoking Cessation and γ-Tocopherol to Restore Vascular Endothelial Function

NCT01314443
View directory record Official record
Conditions
Endothelial Dysfunction
Interventions
Nicotine Replacement Therapy (NRT), Gamma-Tocopherol, Placebo, Smoking cessation
Other · Dietary Supplement · Behavioral
Lead sponsor
University of Connecticut
Other
Eligibility
18 Years to 60 Years
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 21, 2015 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Not applicable Interventional

Effect of Vitamin D in Diets of Preterm Infants

NCT01698840
View directory record Official record
Conditions
Premature Infants
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Baylor College of Medicine
Other
Eligibility
Not listed
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Phase 4 Interventional Results available

A Study of Zemplar® Injection and Hectorol® Injection on Intestinal Absorption of Calcium in Chronic Kidney Disease

NCT00257920
View directory record Official record
Conditions
Chronic Kidney Disease, Stage 5, Secondary Hyperparathyroidism
Interventions
Zemplar® injection, Hectorol® injection
Drug
Lead sponsor
Abbott
Industry
Eligibility
20 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2006
U.S. locations
2
States / cities
Bellevue, Nebraska • Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Dec 24, 2009 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Single Group Study to Evaluate the Effects of a Supplement on Premenstrual Syndrome

NCT06124326
View directory record Official record
Conditions
Premenstrual Syndrome
Interventions
Premenstrual Syndrome Supplement
Dietary Supplement
Lead sponsor
Rael
Industry
Eligibility
18 Years to 40 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Aug 23, 2024 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D Deficiency, Muscle Pain, Joint Pain, and Joint Stiffness in Postmenopausal Women Receiving Letrozole For Stage I-III Breast Cancer

NCT00416715
View directory record Official record
Conditions
Arthralgia, Musculoskeletal Complications, Pain, Recurrent Breast Cancer, Stage I Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer
Interventions
letrozole, calcium carbonate, laboratory biomarker analysis, calcium citrate, calcium glucarate, calcium gluconate, cholecalciferol, assessment of therapy complications, musculoskeletal complications management/prevention
Drug · Dietary Supplement · Other + 1 more
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 11, 2017 · Synced Oct 12, 2026, 2:40 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Study of Changes in Bone Mineral Density as a Function of Consuming Two Different Forms of Calcium Carbonate

NCT01857154
View directory record Official record
Conditions
Osteopenia, Osteoporosis
Interventions
Micronized Calcium Carbonate, Non-Micronized Calcium Carbonate, Vitamin D3
Dietary Supplement
Lead sponsor
Integrative Health Technologies, Inc.
Network
Eligibility
21 Years and older
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Nov 25, 2013 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating Whole Foods Supplementation on Cognition

NCT01672359
View directory record Official record
Conditions
Sub-optimal Cognitive Function, Sub-optimal Immune Function
Interventions
Ginkgo Synergy® and Choline, OPC Synergy® and Catalyn, Placebo
Dietary Supplement
Lead sponsor
University of Miami
Other
Eligibility
60 Years and older
Enrollment
97 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 6, 2014 · Synced Oct 12, 2026, 2:40 AM EDT
Completed Phase 4 Interventional Results available

Long Term Safety and Efficacy Study of Calcitriol 3 mcg/g Ointment in Pediatric Subjects With Plaque Psoriasis

NCT02125279
View directory record Official record
Conditions
Psoriasis Vulgaris
Interventions
Calcitriol
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
2 Years to 16 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
8
States / cities
Fort Smith, Arkansas • Rogers, Arkansas • Burbank, California + 5 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2021 · Synced Oct 12, 2026, 2:40 AM EDT