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ClinicalTrials.gov public records Last synced Oct 4, 2026, 8:55 PM EDT

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Showing 49–72 of 84 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Vitamin D3 400 IU Clear all
Completed Phase 4 Interventional

Vitamin and Asthma Study

NCT01447173
View directory record Official record
Conditions
Asthma
Interventions
Vitamin D
Drug
Lead sponsor
Augusta University
Other
Eligibility
7 Years to 17 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 23, 2012 · Synced Oct 4, 2026, 8:55 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 Oct 4, 2026, 8:55 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Prevention of Vitamin D Deficiency

NCT00494104
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D drops, 200 or 400 or 600 IU/day or 800 IU/day
Dietary Supplement
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
3 Weeks to 5 Weeks
Enrollment
398 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
Coralville, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 18, 2012 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Supplement Study for Adolescents

NCT00909454
View directory record Official record
Conditions
Vitamin D Deficiency, Overweight, Obesity
Interventions
2000 IU Vitamin D3 daily supplement, 400 IU Vitamin D3 supplement
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
14 Years to 19 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 17, 2011 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Phase 4 Interventional Results available

Vitamin D Repletion in Primary Hyperparathyroidism

NCT01306656
View directory record Official record
Conditions
Primary Hyperparathyroidism, Vitamin D Deficiency
Interventions
10,000 IU Vitamin D3, Placebo, Vitamin D
Drug · Other · Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 16, 2019 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Phase 2 Interventional

Calcium and Vitamin D vs Markers of Adenomatous Polyps

NCT00208793
View directory record Official record
Conditions
Colorectal Adenomatous Polyps
Interventions
Calcium and vitamin D3 combined, Placebo, Calcium, Vitamin D3
Dietary Supplement · Drug
Lead sponsor
Emory University
Other
Eligibility
30 Years to 74 Years
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2013
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 26, 2013 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Not applicable Interventional

Prevention of Osteoporosis in Breast Cancer Survivors

NCT00567606
View directory record Official record
Conditions
Postmenopausal Osteoporosis
Interventions
Strength/Weight Training & Drug/Supplement, Drug/Supplement only
Other · Combination Product
Lead sponsor
University of Nebraska
Other
Eligibility
35 Years to 75 Years · Female only
Enrollment
249 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2007
U.S. locations
4
States / cities
Kearney, Nebraska • Lincoln, Nebraska • Omaha, Nebraska + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 30, 2023 · Synced Oct 4, 2026, 8:55 PM EDT
Active, not recruiting Phase 2 Interventional

RANKL Inhibition and Mammographic Breast Density

NCT04067726
View directory record Official record
Conditions
Dense Breasts
Interventions
Denosumab, Placebo, Calcium, Vitamin D3, Core needle biopsy, Blood draw
Drug · Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
40 Years and older · Female only
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Oct 4, 2026, 8:55 PM EDT
Terminated Not applicable Interventional Results available

Vitamin D Deficiency and Atopic Dermatitis

NCT01337635
View directory record Official record
Conditions
Atopic Dermatitis, Vitamin D Deficiency
Interventions
Vitamin D
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
1 Year to 18 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 5, 2018 · Synced Oct 4, 2026, 8:55 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Effect Of Vitamin D On Measures Of Bone Health And Gene Expression

NCT01696409
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
400 IU vitamin D3, 2000 IU vitamin D3
Dietary Supplement
Lead sponsor
Boston University
Other
Eligibility
18 Years to 70 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 4, 2017 · Synced Oct 4, 2026, 8:55 PM EDT
Terminated Not applicable Interventional Results available

Study of Adults With Low Growth Hormone Who Survived Childhood Cancer Where Treatment Caused Low Bone Density

NCT00145704
View directory record Official record
Conditions
Osteopenia
Interventions
bisphosphonate therapy (risedronate), Vitamin D supplement, Calcium
Drug · Dietary Supplement
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2008
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Apr 8, 2013 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Phase 3 Interventional Results available

Zoledronate in Preventing Skeletal (Bone)-Related Events in Men Who Are Receiving Androgen Deprivation Therapy For Prostate Cancer and Bone Metastases

NCT00079001
View directory record Official record
Conditions
Metastatic Cancer, Prostate Cancer
Interventions
zoledronic acid, placebo, androgen deprivation therapy, GnRH agonist, Calcium supplement, Vitamin D
Drug · Other · Dietary Supplement
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Male only
Enrollment
645 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2014
U.S. locations
238
States / cities
Mobile, Alabama • Fort Smith, Arkansas • Little Rock, Arkansas + 159 more
Source: ClinicalTrials.gov public record
Updated May 12, 2020 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Phase 3 Interventional Results available

Zoledronic Acid - Letrozole Adjuvant Synergy Trial (ZFAST) - Cancer Treatment Related Bone Loss in Postmenopausal Women With Estrogen Receptor Positive and/or Progesterone Receptor Positive Breast Cancer Receiving Adjuvant Hormonal Therapy

NCT00050011
View directory record Official record
Conditions
Breast Neoplasms, Osteoporosis
Interventions
Zoledronic Acid, Letrozole
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 85 Years · Female only
Enrollment
602 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2009
U.S. locations
43
States / cities
Springdale, Arkansas • Burbank, California • Lafayette, California + 39 more
Source: ClinicalTrials.gov public record
Updated Mar 21, 2014 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dairy Foods Compared to Dietary Supplements and Bone Health

NCT01394484
View directory record Official record
Conditions
Osteoporosis, Bone Loss, Osteopenia
Interventions
Intervention I, Intervention II
Other · Dietary Supplement
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
50 Years to 65 Years · Female only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Feb 26, 2013 · Synced Oct 4, 2026, 8:55 PM 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 4, 2026, 8:55 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Changes in Breast Cancer Biomarkers Using Synergistic Prostaglandin Inhibitors

NCT01425476
View directory record Official record
Conditions
Breast Cancer
Interventions
Celecoxib, Placebo, Cholecalciferol
Drug
Lead sponsor
Hartford Hospital
Other
Eligibility
18 Years and older · Female only
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2016
U.S. locations
1
States / cities
Grand Forks, North Dakota
Source: ClinicalTrials.gov public record
Updated Aug 9, 2017 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effects of Aromatase Inhibition Versus Testosterone in Older Men With Low Testosterone: Randomized-Controlled Trial.

NCT00104572
View directory record Official record
Conditions
Hypogonadism, Diabetes, Sarcopenia, Osteoporosis, Depression
Interventions
Androgel (Testosterone Gel), Anastrozole (Aromatase Inhibitor), Placebo tablet, Placebo gel, Calcium Cardone 500mg with vitamin D 400 IU
Drug · Dietary Supplement
Lead sponsor
National Institute on Aging (NIA)
NIH
Eligibility
65 Years and older · Male only
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2015
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 6, 2018 · Synced Oct 4, 2026, 8:55 PM EDT
Terminated Not applicable Interventional Results available

Vitamin D Levels in Children With IBD

NCT00621257
View directory record Official record
Conditions
Inflammatory Bowel Disease, Crohn's Disease, Ulcerative Colitis
Interventions
ergocalciferol, Cholecalciferol
Dietary Supplement
Lead sponsor
Boston Children's Hospital
Other
Eligibility
5 Years to 21 Years
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 22, 2017 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effect of Vitamin D3 Supplementation on Insulin Resistance and Cardiovascular Risk Factors in Obese Adolescents

NCT00858247
View directory record Official record
Conditions
Obesity
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
12 Years to 18 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 20, 2014 · Synced Oct 4, 2026, 8:55 PM EDT
Terminated No phase listed Observational

Effect of Vitamin D Supplementation on In-vitro Fertilization (IVF) Outcomes

NCT01419743
View directory record Official record
Conditions
Infertility, Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 38 Years · Female only
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
3
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 19, 2014 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Not applicable Interventional

Vitamin D Supplementation in Older Women

NCT00472823
View directory record Official record
Conditions
Osteoporosis, Aging
Interventions
Vitamin D3, Calcium Citrate (Citracal)
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
57 Years and older · Female only
Enrollment
273 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 14, 2016 · Synced Oct 4, 2026, 8:55 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 Oct 4, 2026, 8:55 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Is Vitamin D Insufficiency and Deficiency Associated With Antepartum and Postpartum Depression?

NCT02272387
View directory record Official record
Conditions
Depression, Postpartum Depression
Interventions
Vitamin D3 (Cholecalciferol), Placebo
Dietary Supplement · Other
Lead sponsor
St. Luke's-Roosevelt Hospital Center
Other
Eligibility
18 Years and older · Female only
Enrollment
151 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 24, 2017 · Synced Oct 4, 2026, 8:55 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Sunweavers: Supporting Native American Women's Vitamin D Research

NCT01490333
View directory record Official record
Conditions
Vitamin D Deficiency, Cardiovascular Diseases
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
55 Years to 75 Years · Female only
Enrollment
99 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
3
States / cities
Bowler, Wisconsin • Lac du Flambeau, Wisconsin • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 20, 2014 · Synced Oct 4, 2026, 8:55 PM EDT