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Showing 1–24 of 53 matching trials from the live ClinicalTrials.gov search.
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Completed Not applicable Interventional Results available

Effects of Zoledronic Acid Versus Alendronate on Bone Loss After Kidney and Kidney/Pancreas Transplants

NCT00580047
View directory record Official record
Conditions
Renal Insufficiency
Interventions
Zoledronic Acid, Calcium with vitamin D, Alendronate
Drug · Combination Product
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2014
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Sep 28, 2026, 6:15 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

Improving Functionality in Older People

NCT03611049
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
High dose Vitamin D3, Low dose Vitamin D3
Dietary Supplement
Lead sponsor
Texas Tech University Health Sciences Center
Other
Eligibility
65 Years to 89 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Jul 22, 2019 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Phase 4 Interventional Results available

Repeated-dose Safety, Efficacy, Pharmacokinetic and Pharmacodynamic of CTAP101, Immediate-release Calcifediol, High-dose Cholecalciferol, and Paricalcitol Plus Low-dose Cholecalciferol in Patients With Secondary Hyperparathyroidism, Chronic Kidney Disease 3-4 and Vitamin D Insufficiency

NCT03588884
View directory record Official record
Conditions
Secondary Hyperparathyroidism Due to Renal Causes, Vitamin D Insufficiency, CKD Stage 3, CKD Stage 4
Interventions
Calcifediol Oral Capsule, Calcifediol Oral Product, Cholecalciferol, Paricalcitol Oral Capsule
Drug
Lead sponsor
OPKO Health, Inc.
Industry
Eligibility
18 Years and older
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
3
States / cities
Garden Grove, California • Chicago, Illinois • West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 8, 2022 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Not applicable Interventional

Serum 25-hydroxy Vitamin D [25(OH)D] Levels, Supplemental Vitamin D, and Parathyroid Hormone Levels in Premature Infants

NCT01469650
View directory record Official record
Conditions
Premature Infants
Interventions
cholecalciferal, cholecalciferol
Dietary Supplement
Lead sponsor
University of Nebraska
Other
Eligibility
23 Weeks to 32 Weeks
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 5, 2023 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Phase 4 Interventional Results available

VERtebral Fracture Treatment Comparisons in Osteoporotic Women

NCT01709110
View directory record Official record
Conditions
Postmenopausal Osteoporosis
Interventions
Teriparatide, Risedronate, Placebo, Calcium, Vitamin D
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
45 Years and older · Female only
Enrollment
1,366 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
30
States / cities
Birmingham, Alabama • Concord, California • Fresno, California + 27 more
Source: ClinicalTrials.gov public record
Updated Sep 22, 2019 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Phase 4 Interventional Results available

Study of the Effect of Velaglucerase Alfa (VPRIV®) on Bone-related Pathology in Treatment-naïve Participants With Type 1 Gaucher Disease

NCT02574286
View directory record Official record
Conditions
Gaucher Disease
Interventions
Velaglucerase alfa, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Shire
Industry
Eligibility
18 Years to 70 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
8
States / cities
Beverly Hills, California • Los Angeles, California • Atlanta, Georgia + 5 more
Source: ClinicalTrials.gov public record
Updated Jan 31, 2022 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Phase 3 Interventional Results available

Safety and Diagnostic Efficacy of Mangoral in Participants With Focal Liver Lesions and Reduced Kidney Function

NCT04119843
View directory record Official record
Conditions
Known or Suspected Focal Liver Lesions, Severe Renal Impairment
Interventions
Mangoral
Drug
Lead sponsor
Ascelia Pharma AB
Industry
Eligibility
18 Years and older
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
14
States / cities
Scottsdale, Arizona • Los Angeles, California • Stanford, California + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 5, 2025 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Vitamin D on 25-hydroxyvitamin D Levels and Physical Function

NCT02293187
View directory record Official record
Conditions
Vitamin D Deficiency, Sarcopenia
Interventions
vitamin D3, Placebo
Dietary Supplement · Other
Lead sponsor
Tufts University
Other
Eligibility
60 Years to 85 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 20, 2019 · Synced Sep 28, 2026, 6:15 PM 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 28, 2026, 6:15 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 20, 2014 · Synced Sep 28, 2026, 6:15 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 13, 2016 · Synced Sep 28, 2026, 6:15 PM EDT
Active, not recruiting Phase 4 Interventional

Novel Precision Medicine Approach to Treatment of Osteoporosis Based on Bone Turnover

NCT05151484
View directory record Official record
Conditions
Age-Related Osteoporosis
Interventions
Teriparatide, Alendronate
Drug
Lead sponsor
Madhumathi Rao
Other
Eligibility
40 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Role of Vitamin D in Menopause: Relationship to Menopausal Symptoms in Body Composition

NCT01141972
View directory record Official record
Conditions
Hot Flushes, Menopause, Premature, Obesity, Vitamin D Deficiency
Interventions
Vitamin D, Placebo
Dietary Supplement · Other
Lead sponsor
Kaiser Permanente
Other
Eligibility
40 Years to 60 Years · Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated May 29, 2013 · Synced Sep 28, 2026, 6:15 PM EDT
Not listed Not applicable Interventional

Effect of Vitamin D Status and Repletion on Postoperative Total Joint Arthroplasty Complications

NCT04229368
View directory record Official record
Conditions
Hip Arthropathy, Knee Arthropathy, Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 15, 2023 · Synced Sep 28, 2026, 6:15 PM EDT
Terminated Phase 3 Interventional Accepts healthy volunteers Results available

Hydroxychloroquine as Post-Exposure Prophylaxis Against COVID-19 Infection

NCT04372017
View directory record Official record
Conditions
COVID-19, SARS-CoV 2
Interventions
Hydroxychloroquine, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Sanford Health
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Sioux Falls, South Dakota
Source: ClinicalTrials.gov public record
Updated Dec 9, 2021 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

How Does Magnesium Status Influence Calcium Homeostasis?

NCT01593501
View directory record Official record
Conditions
Magnesium Deficiency, Calcium Metabolism Disorders
Interventions
vitamin D3
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
30 Years to 75 Years · Female only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 31, 2016 · Synced Sep 28, 2026, 6:15 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Study of Parental Ratings of Quality of Life and Body Composition in 5-19 Year Olds While Participating in the Good NEWS 4 Kids Program

NCT01855009
View directory record Official record
Conditions
Quality of Life, Body Mass Index
Interventions
MannaBears, AlgaeCal Calcium, Calcium carbonate, Vitamin D3
Dietary Supplement
Lead sponsor
Integrative Health Technologies, Inc.
Network
Eligibility
5 Years to 19 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 23, 2013 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Phase 2 Interventional Results available

Treatment for Non-Alcoholic Fatty Liver With Different Doses of Vitamin E

NCT01792115
View directory record Official record
Conditions
Fatty Liver
Interventions
Vitamin E 200 IU/d, Vitamin E 400 IU/d, Vitamin E 800 IU/d, Diet and Exercise
Drug · Behavioral
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 3, 2020 · Synced Sep 28, 2026, 6:15 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 25, 2013 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Phase 4 Interventional Results available

Effects of Teriparatide or Denosumab on Bone in Postmenopausal Women With Osteoporosis

NCT01753856
View directory record Official record
Conditions
Osteoporosis
Interventions
Teriparatide, Denosumab, Demeclocycline, Tetracycline, Calcium Supplement, Vitamin D
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
55 Years to 89 Years · Female only
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
4
States / cities
Lakewood, Colorado • Gainesville, Georgia • Detroit, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 7, 2015 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dried Plums Prevent Inflammation And Improve Bone Health in Osteopenic Men

NCT03408119
View directory record Official record
Conditions
Osteoporosis, Osteopenia
Interventions
Dried Plum, 800 IU vitamin D and 450mg elemental calcium
Dietary Supplement
Lead sponsor
Florida State University
Other
Eligibility
50 Years to 80 Years · Male only
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Oct 6, 2022 · Synced Sep 28, 2026, 6:15 PM EDT
Recruiting Phase 2 Interventional

Effect of Tirzepatide and Bimagrumab on Body Composition, Insulin Sensitivity, and Bone in Adults With Obesity

NCT05933499
View directory record Official record
Conditions
Obesity
Interventions
Bimagrumab, Tirzepatide, Calcium/Vitamin D, Lifestyle and nutrition counseling
Drug · Dietary Supplement · Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 28, 2026, 6:15 PM EDT
Completed Phase 2 Interventional Results available

Vitamin E Dosing Study

NCT04801849
View directory record Official record
Conditions
Nonalcoholic Fatty Liver Disease, Nonalcoholic Steatohepatitis
Interventions
Vitamin E, Placebo
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
9
States / cities
La Jolla, California • Los Angeles, California • San Francisco, California + 6 more
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 28, 2026, 6:15 PM EDT
Active, not recruiting Phase 4 Interventional

Romosozumab Use to Build Skeletal Integrity

NCT05058976
View directory record Official record
Conditions
Osteoporosis, Osteoporosis, Postmenopausal, Osteoporosis Fracture
Interventions
Romosozumab, Placebo, Zoledronic acid, Calcium and Vitamin D
Drug · Dietary Supplement
Lead sponsor
Susan L. Greenspan
Other
Eligibility
65 Years and older · Female only
Enrollment
184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 28, 2026, 6:15 PM EDT