- Conditions
- Hypovitaminosis D
- Interventions
- Cholecalciferol, Placebo
- Dietary Supplement
- Lead sponsor
- Massachusetts General Hospital
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2014
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
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 73–96
of 959
matching trials from the live ClinicalTrials.gov search.
- 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
- Conditions
- Rheumatoid Arthritis, Vitamin D Deficiency
- Interventions
- Placebo sugar pill, Ergocalciferol
- Drug
- Lead sponsor
- Johns Hopkins University
- Other
- Eligibility
- 18 Years to 75 Years
- Enrollment
- 139 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2012
- U.S. locations
- 1
- States / cities
- Baltimore, Maryland
- Conditions
- Reproductive Issues
- Interventions
- Vitamin D, Placebo
- Dietary Supplement · Other
- Lead sponsor
- National Institute of Environmental Health Sciences (NIEHS)
- NIH
- Eligibility
- 19 Years to 40 Years · Female only
- Enrollment
- 998 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2023 – 2024
- U.S. locations
- 2
- States / cities
- Detroit, Michigan • Research Triangle Park, North Carolina
- Conditions
- Hypovitaminosis D
- Interventions
- 25 Hydroxy- Vitamin D3 [25 (OH) D3], Placebo
- Drug
- Lead sponsor
- Charles Drew University of Medicine and Science
- Other
- Eligibility
- 18 Years to 70 Years
- Enrollment
- 330 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2013 – 2018
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- 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
- Conditions
- Wheezing, Allergy
- Interventions
- Cholecalciferol, Cholecalciferol
- Dietary Supplement · Drug
- Lead sponsor
- Case Western Reserve University
- Other
- Eligibility
- Up to 1 Year
- Enrollment
- 300 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013 – 2017
- U.S. locations
- 5
- States / cities
- New York, New York • Cleveland, Ohio • Charleston, South Carolina
- 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
- Osteoporosis
- Interventions
- rhBMP-2/CPM injection and bisphosphonates, calcium, and vitamin D (oral bisphosphonate therapy), bisphosphonates, calcium, and vitamin D
- Drug
- Lead sponsor
- Pfizer
- Industry
- Eligibility
- 65 Years to 85 Years · Female only
- Enrollment
- 50 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2008 – 2015
- U.S. locations
- 28
- States / cities
- Phoenix, Arizona • Tucson, Arizona • Sacramento, California + 15 more
- Conditions
- Pregnancy
- Interventions
- Vitamin D dynamics-pregnant, Vitamin D dynamics-nonpregnant
- Other
- Lead sponsor
- Cornell University
- Other
- Eligibility
- 20 Years to 39 Years · Female only
- Enrollment
- 160 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2024 – 2029
- U.S. locations
- 1
- States / cities
- Rochester, New York
- Conditions
- Hematopoietic Stem Cell Transplant
- Interventions
- Vitamin D and A, Vitamin D and Placebo
- Dietary Supplement
- Lead sponsor
- Children's Hospital Medical Center, Cincinnati
- Other
- Eligibility
- Not listed
- Enrollment
- 83 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2018 – 2023
- U.S. locations
- 1
- States / cities
- Cincinnati, Ohio
- 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
- Conditions
- Overweight and Obesity, Vitamin D Deficiency, Magnesium Deficiency, Cardiovascular Risk Factor
- Interventions
- Vitamin D and magnesium, Vitamin D, Placebo
- Dietary Supplement
- Lead sponsor
- Drexel University
- Other
- Eligibility
- 30 Years to 70 Years
- Enrollment
- 109 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2016 – 2021
- U.S. locations
- 1
- States / cities
- Philadelphia, Pennsylvania
- Conditions
- Vitamin D Deficiency
- Interventions
- Vitamin D, Placebo, Vitamin D + L-cysteine, L-cysteine
- Drug
- Lead sponsor
- Louisiana State University Health Sciences Center Shreveport
- Other
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 165 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2020 – 2022
- U.S. locations
- 1
- States / cities
- Shreveport, Louisiana
- Conditions
- Cognitive Decline
- 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
- 60 Years to 92 Years
- Enrollment
- 3,424 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2021
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Dry Eye Syndrome
- Interventions
- Omega 3, Vitamins A, D3 and E
- Dietary Supplement
- Lead sponsor
- Eye and Vision Technologies and Research Institute
- Network
- Eligibility
- 18 Years to 79 Years
- Enrollment
- 80 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012
- U.S. locations
- 4
- States / cities
- Conifer, Colorado • Oak Lawn, Illinois • Lexington, Kentucky + 1 more
- Conditions
- Cardiovascular Risk Factor
- Interventions
- Multicomponent Virtual Lifestyle Intervention
- Behavioral
- Lead sponsor
- Truemedicine Inc
- Other
- Eligibility
- 30 Years to 60 Years
- Enrollment
- 200 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2026
- U.S. locations
- 1
- States / cities
- San Francisco, California
- Conditions
- Osteoporosis
- Interventions
- Calcium and vitamin D supplementation
- Dietary Supplement
- Lead sponsor
- Winthrop University Hospital
- Other
- Eligibility
- 45 Years to 85 Years · Female only
- Enrollment
- 78 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2011
- U.S. locations
- 1
- States / cities
- Mineola, New York
- Conditions
- Vitamin D, Prematurity
- Interventions
- Vitamin D3, vitamin D3 placebo
- Dietary Supplement
- Lead sponsor
- University of Nebraska
- Other
- Eligibility
- 5 Minutes to 3 Months
- Enrollment
- 64 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2010
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska
- Conditions
- Glucose Intolerance, Type 2 Diabetes Mellitus, Metabolic Syndrome
- Interventions
- Vitamin D3 2,000 IU orally once daily, Calcium Carbonate 400 mg orally twice daily, Vitamin D3-Placebo, Calcium-Placebo
- Drug
- Lead sponsor
- Tufts Medical Center
- Other
- Eligibility
- 40 Years and older
- Enrollment
- 92 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2007 – 2009
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Leukemia, Lymphoblastic, Acute, Osteoporosis
- Interventions
- Calcium carbonate (Tums), vitamin D, Placebo
- Drug · Other
- Lead sponsor
- St. Jude Children's Research Hospital
- Other
- Eligibility
- Not listed
- Enrollment
- 429 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2000 – 2011
- U.S. locations
- 3
- States / cities
- Memphis, Tennessee
- Conditions
- Asthma
- Interventions
- Vitamin D
- Drug
- Lead sponsor
- Augusta University
- Other
- Eligibility
- 7 Years to 17 Years
- Enrollment
- 10 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Augusta, Georgia
- Conditions
- Femur Neck Fracture
- Interventions
- Teriparatide, Placebo, Calcium supplementation, Vitamin D supplementation
- Drug · Dietary Supplement
- Lead sponsor
- Eli Lilly and Company
- Industry
- Eligibility
- 50 Years and older
- Enrollment
- 39 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2013
- U.S. locations
- 19
- States / cities
- San Diego, California • Golden, Colorado • Washington D.C., District of Columbia + 16 more
- Conditions
- Cystic Fibrosis
- Interventions
- ergocalciferol (vitamin D2), Sperti Del Sol Lamp, Vitamin D3
- Drug · Device
- Lead sponsor
- Atlanta VA Medical Center
- Federal
- Eligibility
- 18 Years to 60 Years
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2006 – 2011
- U.S. locations
- 1
- States / cities
- Atlanta, Georgia