- Conditions
- Vitamin D Deficiency
- Interventions
- Not listed
- Lead sponsor
- Nemours Children's Clinic
- Other
- Eligibility
- 6 Months to 3 Years
- Enrollment
- 60 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Jacksonville, 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 169–192
of 415
matching trials from the live ClinicalTrials.gov search.
- Conditions
- Hypovitaminosis D
- Interventions
- 100,000 IU cholecalciferol, Placebo
- Drug
- Lead sponsor
- Massachusetts General Hospital
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 60 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013 – 2015
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Retinal Disease, Age-Related Macular Degeneration, Retinitis Pigmentosa, Stargardt Disease, Optic Neuropathy, Nonarteritic Ischemic Optic Neuropathy, Optic Atrophy, Optic Nerve Disease, Glaucoma, Leber Hereditary Optic Neuropathy, Blindness, Vision Loss Night, Vision Loss Partial, Vision, Low, Retinopathy, Maculopathy, Macular Degeneration, Retina Atrophy
- Interventions
- Arm 1
- Procedure
- Lead sponsor
- MD Stem Cells
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 500 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2016 – 2028
- U.S. locations
- 2
- States / cities
- Westport, Connecticut • Coral Springs, Florida
- 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
- Conditions
- Polycystic Ovarian Syndrome in Adolescent Females, Vitamin D Deficiency
- Interventions
- Vitamin D 4000IU daily, Placebo
- Drug
- Lead sponsor
- Yale University
- Other
- Eligibility
- 13 Years to 21 Years · Female only
- Enrollment
- 60 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2026 – 2028
- U.S. locations
- 1
- States / cities
- New Haven, Connecticut
- Conditions
- Type 1 Diabetes, Vitamin D Deficiency/Insufficiency
- Interventions
- Vitamin D
- Dietary Supplement
- Lead sponsor
- Children's Hospital Los Angeles
- Other
- Eligibility
- 13 Years to 21 Years
- Enrollment
- 26 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2014
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- Conditions
- Inflammatory Bowel Disease, Crohn Disease, Ulcerative Colitis, Vitamin D Deficiency
- Interventions
- vitamin D3
- Dietary Supplement
- Lead sponsor
- Boston Children's Hospital
- Other
- Eligibility
- 5 Years to 25 Years
- Enrollment
- 50 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2020 – 2025
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Vitamin D Deficiency
- Interventions
- Oral Vitamin D3, Ultraviolet Light
- Dietary Supplement · Radiation
- Lead sponsor
- Rockefeller University
- Other
- Eligibility
- 18 Years to 70 Years
- Enrollment
- 118 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2015
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Vitamin D Deficiency
- Interventions
- cholecalciferol
- Dietary Supplement
- Lead sponsor
- Tufts University
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 61 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2013
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- 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
- Vitamin D Deficiency, Breast Milk Collection
- Interventions
- Vitamin D
- Dietary Supplement
- Lead sponsor
- Mayo Clinic
- Other
- Eligibility
- 1 Month to 60 Years
- Enrollment
- 101 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2023 – 2026
- U.S. locations
- 1
- States / cities
- Rochester, Minnesota
- Conditions
- Cardiovascular Diseases, Chronic Kidney Disease Stage 3, Chronic Kidney Disease Stage 4, Chronic Kidney Disease Stage 5, Vitamin K Deficiency, Hemodialysis
- Interventions
- Vitamin K2 (menaquinone-7; 360-mcg/d), Placebo-Control
- Dietary Supplement
- Lead sponsor
- Augusta University
- Other
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 60 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2021
- U.S. locations
- 1
- States / cities
- Augusta, Georgia
- Conditions
- Cognitive Decline
- Interventions
- 540,000 IU vitamin D3, Placebo
- Drug
- Lead sponsor
- Vanderbilt University Medical Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 95 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2018 – 2020
- U.S. locations
- 7
- States / cities
- Aurora, Colorado • Boston, Massachusetts • New York, New York + 3 more
- Conditions
- Sickle Cell Disease, Malnutrition
- Interventions
- Maternal Nutrition Education, Standard Care
- Behavioral
- Lead sponsor
- Vanderbilt University Medical Center
- Other
- Eligibility
- 6 Months to 18 Months
- Enrollment
- 146 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2024 – 2026
- U.S. locations
- 1
- States / cities
- Nashville, Tennessee
- Conditions
- Hyperparathyroidism
- Interventions
- Vitamin D, Four-dimensional computed tomography (4DCT)
- Drug · Device
- Lead sponsor
- M.D. Anderson Cancer Center
- Other
- Eligibility
- 21 Years and older
- Enrollment
- 22 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2007 – 2018
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- Hypertension, Vitamin D Deficiency
- Interventions
- Cholecalciferol
- Drug
- Lead sponsor
- Loyola University
- Other
- Eligibility
- 25 Years to 45 Years
- Enrollment
- 5 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2018
- U.S. locations
- 1
- States / cities
- Maywood, Illinois
- Conditions
- Arthralgia, Musculoskeletal Complications, Pain, Recurrent Breast Cancer, Stage I Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer
- Interventions
- letrozole, calcium carbonate, laboratory biomarker analysis, calcium citrate, calcium glucarate, calcium gluconate, cholecalciferol, assessment of therapy complications, musculoskeletal complications management/prevention
- Drug · Dietary Supplement · Other + 1 more
- Lead sponsor
- University of Washington
- Other
- Eligibility
- 18 Years and older · Female only
- Enrollment
- 100 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2006 – 2010
- U.S. locations
- 1
- States / cities
- Seattle, Washington
- Conditions
- Embolism and Thrombosis, Embolism, Vascular Diseases, Warfarin, Venous Thromboembolism, Thrombosis, Thromboembolism
- Interventions
- CYP 2C9 and VKORC1 Testing for Warfarin
- Other
- Lead sponsor
- Medco Health Solutions, Inc.
- Industry
- Eligibility
- 40 Years to 75 Years
- Enrollment
- 1,635 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2007 – 2010
- U.S. locations
- 1
- States / cities
- Franklin Lakes, New Jersey
- Conditions
- Vitamin A Deficiency, Maternal Mortality, Infant Mortality
- Interventions
- Vitamin A or Beta-Carotene Supplements
- Dietary Supplement
- Lead sponsor
- Johns Hopkins Bloomberg School of Public Health
- Other
- Eligibility
- 15 Years to 49 Years · Female only
- Enrollment
- 59,666 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2001 – 2008
- U.S. locations
- 1
- States / cities
- Baltimore, Maryland
- Conditions
- Polycystic Ovary Syndrome, Vitamin D Deficiency
- Interventions
- Vitamin D3
- Drug
- Lead sponsor
- Maimonides Medical Center
- Other
- Eligibility
- 16 Years to 48 Years · Female only
- Enrollment
- 79 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2013
- U.S. locations
- 1
- States / cities
- Brooklyn, New York
- Conditions
- Endothelial Dysfunction
- Interventions
- Sapropterin Dihydrochloride, Sapropterin Dihydrochloride and Vitamin C
- Drug
- Lead sponsor
- BioMarin Pharmaceutical
- Industry
- Eligibility
- 18 Years to 75 Years
- Enrollment
- 52 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2007 – 2009
- U.S. locations
- 1
- States / cities
- Hackensack, New Jersey
- Conditions
- SCAD, Addison Disease, Ankylosing Spondylitis, Antiphospholipid Antibody Syndrome, Celiac Disease, Crohn Disease, Dermatomyositis, Polymyositis, Guillain-Barre Syndrome, Hepatitis, Autoimmune, Graves Disease, Hashimoto Thyroiditis, Multiple Sclerosis, Myasthenia Gravis, Pernicious Anemia, Polymyalgia Rheumatica, Primary Biliary Cirrhosis, Psoriasis, Rheumatoid Arthritis, Systemic Sclerosis, Sjögren Syndrome, Systemic Lupus Erythematosus, Takayasu Arteritis, Type 1 Diabetes Mellitus, Ulcerative Colitis, Uveitis, Vasculitis, Vitiligo, Raynaud
- Interventions
- Not listed
- Lead sponsor
- Mayo Clinic
- Other
- Eligibility
- 18 Years to 110 Years
- Enrollment
- 114 participants
- Timeline
- 1995 – 2020
- U.S. locations
- 1
- States / cities
- Rochester, Minnesota
- Conditions
- Chronic Kidney Disease, Vitamin D Deficiency
- Interventions
- Ergocalciferol, Calcitriol
- Drug
- Lead sponsor
- Massachusetts General Hospital
- Other
- Eligibility
- 18 Years to 80 Years
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2014
- U.S. locations
- 1
- States / cities
- Cambridge, Massachusetts
- Conditions
- Vitamin D Deficiency
- Interventions
- Not listed
- Lead sponsor
- Creighton University
- Other
- Eligibility
- 18 Years to 60 Years
- Enrollment
- 40 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska