- Conditions
- Frail Elderly, Vitamin d Deficiency
- Interventions
- vitamin D, placebo
- Dietary Supplement
- Lead sponsor
- VA Office of Research and Development
- Federal
- Eligibility
- 65 Years to 95 Years · Male only
- Enrollment
- 130 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2014
- U.S. locations
- 1
- States / cities
- Miami, Florida
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.
These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Showing 97–120
of 407
matching trials from the live ClinicalTrials.gov search.
- Conditions
- Vitamin D Deficiency
- Interventions
- 400 IU vitamin D3, 2,000 IU Vitamin D3
- Dietary Supplement
- Lead sponsor
- USDA, Western Human Nutrition Research Center
- Federal
- Eligibility
- 18 Years to 45 Years · Female only
- Enrollment
- 60 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2013
- U.S. locations
- 2
- States / cities
- Davis, California • Sacramento, California
- Conditions
- Depression, Depressive Symptoms, Mood
- Interventions
- vitamin D3, omega-3 fatty acids (fish oil), Fish oil placebo, Vitamin D placebo
- Dietary Supplement · Drug
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 18,353 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2025
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Cardiovascular Diseases, Vitamin D Deficiency
- Interventions
- Vitamin D3, Placebo
- Dietary Supplement
- Lead sponsor
- University of Wisconsin, Madison
- Other
- Eligibility
- 55 Years to 65 Years · Female only
- Enrollment
- 80 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2010
- U.S. locations
- 1
- States / cities
- Madison, Wisconsin
- Conditions
- Vitamin D Deficiency, Hypertension
- Interventions
- Aliskiren, Cholecalciferol, Placebo
- Drug · Dietary Supplement
- Lead sponsor
- UConn Health
- Other
- Eligibility
- 21 Years and older
- Enrollment
- 40 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Farmington, Connecticut
- Conditions
- Femoral Neck Fractures
- Interventions
- Sliding Hip Screw, Cancellous Screws, Vitamin D, Vitamin D Placebo
- Procedure · Drug
- Lead sponsor
- McMaster University
- Other
- Eligibility
- 18 Years to 60 Years
- Enrollment
- 91 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2014 – 2019
- U.S. locations
- 10
- States / cities
- Phoenix, Arizona • San Francisco, California • Gainesville, Florida + 7 more
- Conditions
- Aging, Skeletal Muscle
- Interventions
- Non-Exercise Control, Resistance Exercise Training, Placebo, HMB+VitD
- Behavioral · Dietary Supplement
- Lead sponsor
- University of Illinois at Urbana-Champaign
- Other
- Eligibility
- 45 Years to 60 Years · Female only
- Enrollment
- 48 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2019 – 2021
- U.S. locations
- 1
- States / cities
- Urbana, Illinois
- Conditions
- Opioid Use Disorder
- Interventions
- [11C]-PHNO, Calcitriol, Placebo Control, PET Scan
- Drug · Dietary Supplement · Other + 1 more
- Lead sponsor
- Yale University
- Other
- Eligibility
- 18 Years to 50 Years
- Enrollment
- 5 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2024 – 2025
- U.S. locations
- 1
- States / cities
- New Haven, Connecticut
- Conditions
- Asthma
- Interventions
- Vitamin D 3 cholecalciferol, Vitamin D3
- Dietary Supplement
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 18 Years to 39 Years · Female only
- Enrollment
- 876 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2023
- U.S. locations
- 3
- States / cities
- San Diego, California • Boston, Massachusetts • St Louis, Missouri
- Conditions
- Prostate Cancer
- Interventions
- risedronate, Placebo risedronate oral tablet
- Drug
- Lead sponsor
- UConn Health
- Other
- Eligibility
- 55 Years to 85 Years · Male only
- Enrollment
- 50 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2003 – 2009
- U.S. locations
- 1
- States / cities
- Farmington, Connecticut
- Conditions
- Type 1 Diabetes
- Interventions
- Ergocalciferol, Placebo
- Drug · Other
- Lead sponsor
- Benjamin U. Nwosu, MD
- Other
- Eligibility
- 10 Years to 21 Years
- Enrollment
- 48 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2021
- U.S. locations
- 1
- States / cities
- Worcester, Massachusetts
- Conditions
- Cluster Headache
- Interventions
- Vitamin D, multivitamin, Placebo
- Dietary Supplement
- Lead sponsor
- The University of Texas Health Science Center, Houston
- Other
- Eligibility
- 18 Years to 70 Years
- Enrollment
- 27 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2024
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- COVID-19, Corona Virus Infection, Coronavirus-19, Sars-CoV2
- Interventions
- Hydroxychloroquine, Azithromycin, Vitamin C, Vitamin D, Zinc
- Drug · Dietary Supplement
- Lead sponsor
- ProgenaBiome
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 118 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2020 – 2024
- U.S. locations
- 1
- States / cities
- Ventura, California
- Conditions
- Osteoporosis, Cardiac Transplantation
- Interventions
- Alendronate, Calcitriol, Placebo Alendronate, Placebo Calcitriol
- Drug
- Lead sponsor
- Columbia University
- Other
- Eligibility
- 20 Years to 70 Years
- Enrollment
- 149 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 1997 – 2002
- U.S. locations
- 2
- States / cities
- New York, New York
- Conditions
- Colorectal Cancer
- Interventions
- Vitamin D intervention, Placebo intervention
- Dietary Supplement
- Lead sponsor
- Baylor University
- Other
- Eligibility
- 18 Years to 79 Years
- Enrollment
- 43 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Waco, Texas
- Conditions
- Renal Function, Endothelial Function, Blood Pressure, Overweight, Obesity
- Interventions
- Vitamin D ergocalciferol, Probenecid, Allopurinol, Placebo
- Drug
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 18 Years to 75 Years
- Enrollment
- 242 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Healthy
- Interventions
- vitamin D, aerobic training
- Dietary Supplement · Other
- Lead sponsor
- David Travis Thomas
- Other
- Eligibility
- 60 Years and older
- Enrollment
- 50 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2014 – 2018
- U.S. locations
- 1
- States / cities
- Lexington, Kentucky
- Conditions
- Prostatic Neoplasms, Bone Mineral Density Quantitative Trait Locus 3
- Interventions
- vitamin D, Placebo
- Dietary Supplement
- Lead sponsor
- University of Rochester
- Other
- Eligibility
- 60 Years to 99 Years · Male only
- Enrollment
- 108 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2014 – 2016
- U.S. locations
- 1
- States / cities
- Rochester, New York
- Conditions
- Healthy
- Interventions
- Vitamin D, Placebo
- Dietary Supplement
- Lead sponsor
- University of Kentucky
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 45 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2012
- U.S. locations
- 1
- States / cities
- Lexington, Kentucky
- Conditions
- Melanoma, Skin
- Interventions
- Vitamin D3, placebo and vitamin D
- Drug
- Lead sponsor
- Stanford University
- Other
- Eligibility
- 18 Years to 75 Years · Female only
- Enrollment
- 24 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2014
- U.S. locations
- 1
- States / cities
- Palo Alto, California
- Conditions
- Postpartum Depression, Preterm Labor
- Interventions
- Mindfulness-based intervention (with a focus on self-compassion; MBSC), Vitamin D
- Behavioral · Dietary Supplement
- Lead sponsor
- University of Idaho
- Other
- Eligibility
- 18 Years to 50 Years · Female only
- Enrollment
- 500 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2027
- U.S. locations
- 1
- States / cities
- Coeur d'Alene, Idaho
- Conditions
- Diabetic Nephropathy, Chronic Kidney Disease
- Interventions
- Zemplar (paricalcitol) capsules, Placebo
- Drug
- Lead sponsor
- Abbott
- Industry
- Eligibility
- 20 Years and older
- Enrollment
- 281 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2006 – 2009
- U.S. locations
- 27
- States / cities
- Phoenix, Arizona • Fountain Valley, California • Yuba City, California + 21 more
- Conditions
- Hyperlipidemia
- Interventions
- Vitamin D3, Placebo
- Dietary Supplement · Other
- Lead sponsor
- Avera McKennan Hospital & University Health Center
- Other
- Eligibility
- 18 Years to 88 Years
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Sioux Falls, South Dakota
- Conditions
- Rheumatoid Arthritis, Hypovitaminosis D
- Interventions
- Vitamin D, placebo
- Dietary Supplement
- Lead sponsor
- University of Wisconsin, Madison
- Other
- Eligibility
- 18 Years to 90 Years
- Enrollment
- 22 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2005 – 2009
- U.S. locations
- 1
- States / cities
- Madison, Wisconsin