- Conditions
- Tuberculosis, Vitamin D, Immunity
- Interventions
- Vitamin D (600 IU), Vitamin D (2000 IU), Vitamin D (4000 IU), Placebo
- Dietary Supplement · Other
- Lead sponsor
- Cornell University
- Other
- Eligibility
- 18 Years to 60 Years
- Enrollment
- 200 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2023
- U.S. locations
- 1
- States / cities
- Ithaca, New York
Search Results
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Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.
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Showing 1–24
of 63
matching trials from the live ClinicalTrials.gov search.
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- Conditions
- Spinal Cord Injury, Vitamin D Deficiency
- Interventions
- Vitamin D3
- Drug
- Lead sponsor
- James J. Peters Veterans Affairs Medical Center
- Federal
- Eligibility
- 18 Years to 75 Years
- Enrollment
- 88 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2016
- U.S. locations
- 1
- States / cities
- The Bronx, New York
- Conditions
- Vitamin D Deficiency
- Interventions
- Vitamin D and Calcium
- Dietary Supplement
- Lead sponsor
- CONRAD
- Other
- Eligibility
- 21 Years to 50 Years · Female only
- Enrollment
- 22 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2014 – 2015
- U.S. locations
- 1
- States / cities
- Norfolk, Virginia
- Conditions
- Seasonal Allergic Rhinitis
- Interventions
- Vitamin D3, Placebo, Fluticasone Propionate
- Drug
- Lead sponsor
- University of Chicago
- Other
- Eligibility
- 18 Years to 45 Years
- Enrollment
- 35 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Chicago, Illinois
- Conditions
- Gastrointestinal Cancers, Prostate Cancer, Hypertension
- Interventions
- Vitamin D, Placebo
- Drug · Dietary Supplement
- Lead sponsor
- Dana-Farber Cancer Institute
- Other
- Eligibility
- 30 Years to 80 Years
- Enrollment
- 328 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2007 – 2013
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- 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
- Conditions
- Renal Insufficiency, Chronic, Kidney Failure, Chronic
- Interventions
- NanoD4CKD, MicroD4CKD
- Dietary Supplement
- Lead sponsor
- University of Florida
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 21 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2023
- U.S. locations
- 1
- States / cities
- Gainesville, Florida
- 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
- Vitamin D Deficiency
- Interventions
- Cholecalciferol
- Dietary Supplement
- Lead sponsor
- Augusta University
- Other
- Eligibility
- 13 Years to 45 Years
- Enrollment
- 74 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- Augusta, Georgia
- Conditions
- Vitamin D Deficiency, Burns
- Interventions
- Ergocalciferol Capsules
- Drug
- Lead sponsor
- University of Texas Southwestern Medical Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 48 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022 – 2025
- U.S. locations
- 1
- States / cities
- Dallas, Texas
- Conditions
- Vitamin D Deficiency, Falls
- Interventions
- 200 IU/d cholecalciferol, 1000 IU/d cholecalciferol, 2000 IU/d cholecalciferol, 4000 IU/d cholecalciferol
- Dietary Supplement
- Lead sponsor
- Johns Hopkins University
- Other
- Eligibility
- 70 Years and older
- Enrollment
- 688 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2015 – 2019
- U.S. locations
- 2
- States / cities
- Baltimore, Maryland • Hagerstown, Maryland
- Conditions
- Sarcopenia, Falls
- Interventions
- vitamin D3, Placebo
- Dietary Supplement
- Lead sponsor
- Tufts University
- Other
- Eligibility
- 65 Years and older · Female only
- Enrollment
- 24 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2006 – 2011
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Muscle Function, Muscle Soreness, Vitamin D Status
- Interventions
- Vitamin D2 mushroom powder, Placebo
- Dietary Supplement · Other
- Lead sponsor
- Appalachian State University
- Other
- Eligibility
- 20 Years to 40 Years · Male only
- Enrollment
- 33 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2013
- U.S. locations
- 3
- States / cities
- Kannapolis, North Carolina
- 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
- Obesity, Insulin Resistance, Inflammation
- Interventions
- Vitamin D, Placebo
- Dietary Supplement · Drug
- Lead sponsor
- Purdue University
- Other
- Eligibility
- 18 Years to 35 Years
- Enrollment
- 34 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2010
- U.S. locations
- 1
- States / cities
- West Lafayette, Indiana
- 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, microcrystalline cellulose
- Dietary Supplement · Other
- Lead sponsor
- Tufts University
- Other
- Eligibility
- 40 Years and older
- Enrollment
- 100 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2011
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Gestational Diabetes
- Interventions
- 4000 IU vitamin D3
- Drug
- Lead sponsor
- University of Minnesota
- Other
- Eligibility
- 18 Years and older · Female only
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2020
- U.S. locations
- 1
- States / cities
- Minneapolis, Minnesota
- Conditions
- Muscle Pain, Joint Pain
- Interventions
- Vitamin D3
- Drug
- Lead sponsor
- HealthPartners Institute
- Other
- Eligibility
- 18 Years and older · Female only
- Enrollment
- 116 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2015
- U.S. locations
- 1
- States / cities
- Minneapolis, Minnesota
- Conditions
- Solid Cancers
- Interventions
- Grape Seed Extract, Vitamin D
- Drug
- Lead sponsor
- Medical University of South Carolina
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 22 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013 – 2016
- U.S. locations
- 1
- States / cities
- Charleston, South Carolina
- Conditions
- Vitamin D Deficiency
- Interventions
- cholecalciferol (vitamin D3), cholecalciferol
- Drug
- Lead sponsor
- Medical University of South Carolina
- Other
- Eligibility
- 16 Years to 45 Years · Female only
- Enrollment
- 501 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2004 – 2010
- U.S. locations
- 1
- States / cities
- Charleston, South Carolina
- Conditions
- Urticaria, Angioedema, Hives, Swelling
- Interventions
- High Dose Vitamin D3, Low Dose Vitamin D3
- Drug
- Lead sponsor
- University of Nebraska
- Other
- Eligibility
- 19 Years and older
- Enrollment
- 42 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2013
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska
- Conditions
- Arterial Dysfunction, Chronic Kidney Disease
- Interventions
- Cholecalciferol, Calcitriol
- Drug
- Lead sponsor
- University of Colorado, Denver
- Other
- Eligibility
- 18 Years to 80 Years
- Enrollment
- 128 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- Aurora, Colorado
- Conditions
- HIV-associated Co-morbidities
- Interventions
- conventional vitamin D treatment, tiered/titrated vitamin D dosing
- Dietary Supplement · Drug
- Lead sponsor
- Andrea Branch
- Other
- Eligibility
- 18 Years to 70 Years
- Enrollment
- 62 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2011 – 2015
- U.S. locations
- 1
- States / cities
- New York, New York