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ClinicalTrials.gov public records Last synced Oct 4, 2026, 5:17 AM EDT

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Showing 1–24 of 45 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D and calcium supplementation Clear all
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 4, 2026, 5:17 AM EDT
Recruiting Early Phase 1 Interventional

Vitamin D in Patients With Stage I-III Colon Cancer or Resectable Colon Cancer Liver Metastases

NCT02172651
View directory record Official record
Conditions
Stage, Colon Cancer, Stage I-III Colon Cancer, Stage IV Colon Cancer With Resectable Liver Metastases
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Clinical Trial of Vitamin D3 to Reduce Cancer Risk in Postmenopausal Women

NCT01052051
View directory record Official record
Conditions
Cancer
Interventions
Vitamin D3, Calcium carbonate
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
55 Years and older · Female only
Enrollment
2,303 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Fremont, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 24, 2019 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 3 Interventional Results available

Second Study of the Effect of Teriparatide on Hip Fracture Healing

NCT01473602
View directory record Official record
Conditions
Femur Neck Fracture
Interventions
Teriparatide, Placebo, Calcium supplementation, Vitamin D supplementation
Drug · Dietary Supplement
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
50 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
19
States / cities
San Diego, California • Golden, Colorado • Washington D.C., District of Columbia + 16 more
Source: ClinicalTrials.gov public record
Updated Apr 16, 2015 · Synced Oct 4, 2026, 5:17 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Absorption of Transdermal Vitamins in Post Bariatric Surgery Patients

NCT03360435
View directory record Official record
Conditions
Bariatric Surgery Candidate, Vitamin Deficiency, Mineral Deficiency
Interventions
Patch MD MultiVitamin Plus patch
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
99 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 9, 2021 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D and Calcium Study

NCT00857831
View directory record Official record
Conditions
Spinal Cord Injury
Interventions
Vitamin D and Calcium
Dietary Supplement
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 3, 2012 · Synced Oct 4, 2026, 5:17 AM EDT
Not listed Phase 4 Interventional

The Effect of Vitamin D Supplementation on Calcium Excretion in Thalassemia: a Dose Response Study

NCT01323608
View directory record Official record
Conditions
Thalassemia Major
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
6 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 19, 2011 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 1 Interventional

Cord Blood Plus Vitamin D and Omega 3s in T1D

NCT00873925
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
Autologous UCB, Omega 3 FA, Vitamin D
Biological · Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
1 Year to 18 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 4, 2013 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 3 Interventional Results available

Effect of Teriparatide on Hip Fracture Healing

NCT01473589
View directory record Official record
Conditions
Femur Neck Fracture
Interventions
Teriparatide, Placebo, Calcium supplementation, Vitamin D supplementation
Drug · Dietary Supplement
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
50 Years and older
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
24
States / cities
Phoenix, Arizona • Tucson, Arizona • La Mesa, California + 21 more
Source: ClinicalTrials.gov public record
Updated Apr 16, 2015 · Synced Oct 4, 2026, 5:17 AM EDT
Not yet recruiting Phase 2 Interventional

HMB Plus Vitamin D to Preserve Muscle in Older Adults Starting Semaglutide

NCT07760948
View directory record Official record
Conditions
Type 2 Diabetes Mellitus (T2DM), Sarcopenia, Obesity, Muscle Loss, Older Adults
Interventions
Calcium-HMB Plus Vitamin D3, Matching placebo
Dietary Supplement · Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
65 Years to 85 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 28, 2026 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 1 Interventional Results available

Study to Evaluate Romosozumab in Children and Adolescents With Osteogenesis Imperfecta

NCT04545554
View directory record Official record
Conditions
Osteogenesis Imperfecta
Interventions
Romosozumab, Calcium, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Amgen
Industry
Eligibility
5 Years to 17 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
3
States / cities
Indianapolis, Indiana • Nashville, Tennessee • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 15, 2024 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Calcium Supplementation for a Healthy Weight-Lite (CaSHeW Lite)

NCT00386672
View directory record Official record
Conditions
Obesity, Overweight
Interventions
Reduced energy (lite) OJ fortified with Calcium and Vitamin D, Nutrition Counseling, Reduced energy (lite) OJ without Calcium and Vitamin D
Dietary Supplement · Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
83 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 10, 2017 · Synced Oct 4, 2026, 5:17 AM EDT
Active, not recruiting Phase 2Phase 3 Interventional

Setrusumab vs Placebo for Osteogenesis Imperfecta

NCT05125809
View directory record Official record
Conditions
Osteogenesis Imperfecta
Interventions
Setrusumab, Placebo
Biological · Other
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
5 Years to 25 Years
Enrollment
183 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
23
States / cities
Little Rock, Arkansas • Los Angeles, California • Sacramento, California + 20 more
Source: ClinicalTrials.gov public record
Updated Feb 25, 2026 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Vitamin D HIV Study on Postmenopausal Women

NCT01375010
View directory record Official record
Conditions
HIV
Interventions
Vitamin D3, Placebo, Vitamin Supplements
Drug · Other
Lead sponsor
Columbia University
Other
Eligibility
40 Years to 70 Years · Female only
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 7, 2019 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Not applicable Interventional Results available

Health Benefits of Vitamin D and Calcium in Women With PCOS (Polycystic Ovarian Syndrome)

NCT00743574
View directory record Official record
Conditions
Polycystic Ovarian Syndrome, Vitamin D Deficiency
Interventions
Vitamin D2 (Ergocalciferol), Medroxyprogesterone (Provera), Vitamin D3 (Cholecalciferol), Elemental Calcium
Dietary Supplement · Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 13, 2021 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study

NCT03070483
View directory record Official record
Conditions
Hypertension, Vitamin D Deficiency
Interventions
Cholecalciferol
Drug
Lead sponsor
Loyola University
Other
Eligibility
25 Years to 45 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 24, 2020 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 2 Interventional Results available

Prevention of Bone Loss After Pediatric Hematopoietic Cell Transplantation

NCT02074631
View directory record Official record
Conditions
Osteopenia, Osteoporosis
Interventions
Pamidronate, Calcium and vitamin D
Drug
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
1 Year to 20 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
2
States / cities
Minneapolis, Minnesota • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 20, 2024 · Synced Oct 4, 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 15, 2026 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 4 Interventional Results available

Impact on Reducing the Incidence of Low Serum Calcium by Providing Educational Materials on the Need to Take Daily Supplemental Calcium and Vitamin D to Patients With Paget's Disease Treated With Reclast®

NCT00668200
View directory record Official record
Conditions
Paget's Disease of the Bone, Hypocalcemia
Interventions
Reclast (ZOL446, zoledronic acid), Calcium, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
Not listed
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
9
States / cities
Phoenix, Arizona • Tucson, Arizona • Gainesville, Georgia + 6 more
Source: ClinicalTrials.gov public record
Updated Mar 6, 2015 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Not applicable Interventional

Nutritional Supplements and Foot Surgery

NCT05522179
View directory record Official record
Conditions
Foot Injuries and Disorders
Interventions
NutraHeal, NutraHeal Plus
Dietary Supplement
Lead sponsor
NutraHeal
Industry
Eligibility
20 Years to 80 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
3
States / cities
Altoona, Pennsylvania • Ebensburg, Pennsylvania • State College, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 1, 2023 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 1 Interventional

Zoledronic Acid (ZOMETA) With Cyclophosphamide With Neuroblastoma and Cortical Bone Involvement

NCT00206388
View directory record Official record
Conditions
NEUROBLASTOMA
Interventions
Zolendric acid, Cyclophosphamide
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
Up to 30 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2013
U.S. locations
8
States / cities
Los Angeles, California • San Francisco, California • Stanford, California + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 2, 2013 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Comparing a Novel Phototherapy Kiosk to Oral Vitamin D Supplementation

NCT04556136
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Standing Phototherapy Kiosk, D3 Oral supplement
Device · Dietary Supplement
Lead sponsor
Madigan Army Medical Center
Federal
Eligibility
18 Years to 69 Years
Enrollment
106 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Mar 13, 2024 · Synced Oct 4, 2026, 5:17 AM EDT
Completed Phase 3 Interventional

Supplementation With Vitamin D, Calcium or Both on Calcium Absorption and Bone Mineral Content in Children With JRA

NCT00570934
View directory record Official record
Conditions
Juvenile Rheumatoid Arthritis
Interventions
Cholecalciferol, Calcium, Calcium and cholecalciferol, Placebo
Dietary Supplement · Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
3 Years to 15 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2002
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 10, 2016 · Synced Oct 4, 2026, 5:17 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Vitamin D Supplementation and Metabolism in Vitamin D Deficient Elderly

NCT01145703
View directory record Official record
Conditions
Vitamin D Deficiency, Metabolic Syndrome
Interventions
RDA Vitamin D3 only, Vitamin D2/3 Repletion only, Vitamin D2/3 Repletion + AEX, Vitamin D2/3 Repletion + RT
Dietary Supplement · Other
Lead sponsor
Baltimore VA Medical Center
Federal
Eligibility
40 Years to 85 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 5, 2014 · Synced Oct 4, 2026, 5:17 AM EDT