- Conditions
- Post-Acute COVID-19 Syndrome, Fatigue
- Interventions
- Dietary intervention to mitigate Post-Acute COVID-19 Syndrome, Attention Control
- Other
- Lead sponsor
- University of Maryland, Baltimore
- Other
- Eligibility
- 50 Years to 94 Years
- Enrollment
- 56 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2025 – 2028
- U.S. locations
- 1
- States / cities
- Baltimore, Maryland
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 25–48
of 959
matching trials from the live ClinicalTrials.gov search.
- Conditions
- Vitamin D Deficiency
- Interventions
- Vitamin D3, placebo
- Drug
- Lead sponsor
- Winthrop University Hospital
- Other
- Eligibility
- 18 Years to 70 Years
- Enrollment
- 27 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2008 – 2013
- U.S. locations
- 1
- States / cities
- Mineola, New York
- 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
- Conditions
- Vitamin D Deficiency
- Interventions
- Oral Vitamin D Supplementation
- Drug
- Lead sponsor
- Winthrop University Hospital
- Other
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 150 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2004 – 2006
- U.S. locations
- 1
- States / cities
- Mineola, New York
- 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
- Fracture, Fracture Nonunion, Fractures, Bone, Vitamin D
- Interventions
- Vitamin D Assessment, Fracture
- Other
- Lead sponsor
- Methodist Health System
- Other
- Eligibility
- 18 Years to 25 Years
- Enrollment
- 100 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2020 – 2021
- U.S. locations
- 1
- States / cities
- Dallas, Texas
- 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
- Conditions
- Nutrition, Healthy
- Interventions
- Dairy Milk, Soy Milk, Almond Milk, Oat Milk
- Other
- Lead sponsor
- Clinical Nutrition Research Center, Illinois Institute of Technology
- Industry
- Eligibility
- 25 Years to 70 Years
- Enrollment
- 60 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2023 – 2026
- U.S. locations
- 1
- States / cities
- Chicago, Illinois
- Conditions
- Prostate Cancer
- Interventions
- Vitamin D, Omega-3, Turmeric
- Dietary Supplement
- Lead sponsor
- Case Comprehensive Cancer Center
- Other
- Eligibility
- Male only
- Enrollment
- 37 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2019
- U.S. locations
- 1
- States / cities
- Cleveland, Ohio
- Conditions
- Elderly, Frail
- Interventions
- Vitamin D + Sham Exercise, Vitamin D Placebo + Exercise, Vitamin D Placebo + Sham Exercise, Vitamin D + Exercise
- Drug · Procedure
- Lead sponsor
- Pfizer
- Industry
- Eligibility
- 75 Years and older
- Enrollment
- 64 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2005 – 2008
- U.S. locations
- 4
- States / cities
- Farmington, Connecticut • Hyattsville, Maryland • Roslindale, Massachusetts + 1 more
- Conditions
- Vitamin D Deficiency
- Interventions
- Redoxon VI, placebo
- Dietary Supplement
- Lead sponsor
- Oregon State University
- Other
- Eligibility
- 55 Years to 75 Years
- Enrollment
- 42 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2016 – 2019
- U.S. locations
- 1
- States / cities
- Corvallis, Oregon
- Conditions
- Chronic Sinusitis
- Interventions
- Vitamin D
- Biological
- Lead sponsor
- Medical University of South Carolina
- Other
- Eligibility
- 14 Years and older
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013
- U.S. locations
- 1
- States / cities
- Charleston, South Carolina
- 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
- Conditions
- Breast Cancer
- Interventions
- Vitamin D
- Drug
- Lead sponsor
- Stanford University
- Other
- Eligibility
- 18 Years and older · Female only
- Enrollment
- 63 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2008 – 2011
- U.S. locations
- 1
- States / cities
- Stanford, California
- Conditions
- Obesity, Vitamin D Deficiency
- Interventions
- Vitamin D3 and Calcium
- Dietary Supplement
- Lead sponsor
- Vadim Sherman, MD
- Other
- Eligibility
- 18 Years to 65 Years · Female only
- Enrollment
- 37 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- Healthy Adult Participants, Vitamin D Insufficiency
- Interventions
- Vitamin D3 bioenhanced eggs, 25(OH)D3 bioenhanced eggs
- Dietary Supplement
- Lead sponsor
- Cornell University
- Other
- Eligibility
- 18 Years to 40 Years
- Enrollment
- 60 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2027 – 2029
- U.S. locations
- 1
- States / cities
- Ithaca, New York
- Conditions
- PMS, Menstrual Cramp, Mood Change
- Interventions
- PMS Capsule, Capsule Placebo, PMS Gummy, Gummy Placebo
- Dietary Supplement
- Lead sponsor
- Semaine Health
- Industry
- Eligibility
- 18 Years and older · Female only
- Enrollment
- 176 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2024
- U.S. locations
- 1
- States / cities
- Las Vegas, Nevada
- Conditions
- Chronic Kidney Disease, Secondary Hyperparathyroidism
- Interventions
- Contrast Enhanced Ultrasonography
- Drug
- Lead sponsor
- University of Virginia
- Other
- Eligibility
- 18 Years to 75 Years
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2013
- U.S. locations
- 1
- States / cities
- Charlottesville, Virginia
- 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
- Conditions
- Irritable Bowel Syndrome, Vitamin D Deficiency, Abdominal Pain
- Interventions
- Vitamin D, placebo
- Dietary Supplement
- Lead sponsor
- Beth Israel Deaconess Medical Center
- Other
- Eligibility
- 18 Years to 80 Years
- Enrollment
- 7 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2018
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Anemia
- Interventions
- Vitamin D3 ., omega-3 fatty acids (fish oil), Vitamin D3 placebo, Fish oil placebo
- Dietary Supplement · Drug
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 2,000 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2025
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- 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
- Type 2 Diabetes
- Interventions
- Cholecalciferol
- Drug
- Lead sponsor
- Florida International University
- Other
- Eligibility
- 30 Years to 70 Years
- Enrollment
- 92 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2013
- U.S. locations
- 1
- States / cities
- Miami, Florida
- Conditions
- Osteoporosis, Bone Diseases, Metabolic
- Interventions
- Bone Mineral Density Result Letter and Bone Health Brochure
- Behavioral
- Lead sponsor
- Fredric D Wolinsky
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 7,749 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2015
- U.S. locations
- 3
- States / cities
- Birmingham, Alabama • Atlanta, Georgia • Iowa City, Iowa