- Conditions
- Nutrition Status, Bone Health
- Interventions
- Calcium/Vitamin D, Placebo
- Dietary Supplement
- Lead sponsor
- United States Army Research Institute of Environmental Medicine
- Federal
- Eligibility
- 17 Years and older
- Enrollment
- 380 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2015 – 2016
- U.S. locations
- 1
- States / cities
- Parris Island, South Carolina
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 409–432
of 960
matching trials from the live ClinicalTrials.gov search.
- Conditions
- Colorectal Cancer, Polyps, Adenomas
- Interventions
- Calcium Carbonate, Vitamin D3, placebo
- Drug
- Lead sponsor
- Dartmouth-Hitchcock Medical Center
- Other
- Eligibility
- 45 Years to 75 Years
- Enrollment
- 2,813 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2004 – 2016
- U.S. locations
- 10
- States / cities
- Los Angeles, California • Denver, Colorado • Atlanta, Georgia + 7 more
- Conditions
- Hypovitaminosis D
- Interventions
- Vitamin D, Placebo candy
- Dietary Supplement · Other
- Lead sponsor
- University of New Mexico
- Other
- Eligibility
- 5 Years to 14 Years
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Albuquerque, New Mexico
- Conditions
- Stage I Prostate Cancer AJCC v8, Stage II Prostate Cancer AJCC v8, Stage III Prostate Cancer AJCC v8, Stage IVA Prostate Cancer AJCC v8
- Interventions
- Biospecimen Collection, D Vitamin, Dual X-ray Absorptiometry, Placebo Administration, Quality-of-Life Assessment, Questionnaire Administration
- Procedure · Dietary Supplement · Drug + 1 more
- Lead sponsor
- University of Rochester
- Other
- Eligibility
- 50 Years and older · Male only
- Enrollment
- 240 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2023 – 2029
- U.S. locations
- 51
- States / cities
- Newark, Delaware • Danville, Illinois • Decatur, Illinois + 39 more
- Conditions
- Hypercholesterolemia, Vitamin D Deficiency
- Interventions
- Vitamin D (1000 or 2000 IU/day), Placebo
- Dietary Supplement · Other
- Lead sponsor
- University of California, San Francisco
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 130 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2012
- U.S. locations
- 1
- States / cities
- San Francisco, California
- Conditions
- Hypovitaminosis D, Spinal Disease, Osteoporosis
- Interventions
- Not listed
- Lead sponsor
- OSF Healthcare System
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 460 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- Started 2015
- U.S. locations
- 1
- States / cities
- Peoria, Illinois
- Conditions
- Hypertension
- Interventions
- Vitamin D-3 (cholecalciferol), 2000 IU, Omega-3 fatty acids (fish oil), Vitamin D placebo, Fish oil placebo
- Dietary Supplement · Drug
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 50 Years to 99 Years
- Enrollment
- 25,875 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2011 – 2026
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Healthy
- Interventions
- Vitamin D3 1000 IU, Placebo Tablet
- Dietary Supplement
- Lead sponsor
- University of Pittsburgh
- Other
- Eligibility
- 8 Years to 14 Years
- Enrollment
- 157 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2011
- U.S. locations
- 1
- States / cities
- Pittsburgh, Pennsylvania
- Conditions
- Contiguous Stage II Small Lymphocytic Lymphoma, Noncontiguous Stage II Small Lymphocytic Lymphoma, Stage 0 Chronic Lymphocytic Leukemia, Stage I Chronic Lymphocytic Leukemia, Stage I Small Lymphocytic Lymphoma, Stage II Chronic Lymphocytic Leukemia
- Interventions
- curcumin, cholecalciferol, laboratory biomarker analysis, pharmacological study
- Drug · Dietary Supplement · Other
- Lead sponsor
- Paolo Caimi, MD
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 35 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2014 – 2018
- U.S. locations
- 1
- States / cities
- Cleveland, Ohio
- 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
- Chronic Kidney Disease, Endothelial Dysfunction, Inflammation, Hypertension
- Interventions
- paricalcitol, Placebo
- Drug
- Lead sponsor
- Indiana University
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 24 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2006 – 2007
- U.S. locations
- 1
- States / cities
- Indianapolis, Indiana
- Conditions
- SARS-CoV-2 Infection
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- University of Chicago
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 1,475 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2020 – 2024
- U.S. locations
- 2
- States / cities
- Chicago, Illinois
- Conditions
- Vitamin D Deficiency
- Interventions
- Not listed
- Lead sponsor
- Fujirebio Diagnostics, Inc.
- Industry
- Eligibility
- Not listed
- Enrollment
- 482 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2014 – 2015
- U.S. locations
- 1
- States / cities
- Mountain View, California
- Conditions
- Multiple Myeloma
- Interventions
- Lenalidomide, Maintenance Vitamin D, No maintenance Vitamin D
- Drug
- Lead sponsor
- Amany Keruakous, MD, MS.
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 100 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2024 – 2028
- U.S. locations
- 1
- States / cities
- Augusta, Georgia
- Conditions
- Chronic Kidney Disease, Vitamin D Deficiency
- Interventions
- Cholecalciferol, Placebo
- Drug
- Lead sponsor
- Atlanta VA Medical Center
- Federal
- Eligibility
- 18 Years to 85 Years
- Enrollment
- 34 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2005 – 2013
- U.S. locations
- 1
- States / cities
- Atlanta, Georgia
- Conditions
- Vitamin D and Calcium Homeostasis
- Interventions
- Rifampin, Clarithromycin, Grapefruit Juice, Placebo
- Drug · Other
- Lead sponsor
- University of Washington
- Other
- Eligibility
- 18 Years to 60 Years
- Enrollment
- 92 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2014 – 2020
- U.S. locations
- 1
- States / cities
- Seattle, Washington
- Conditions
- Pregnancy
- Interventions
- Not listed
- Lead sponsor
- Cornell University
- Other
- Eligibility
- 21 Years and older · Female only
- Enrollment
- 47 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Ithaca, New York
- Conditions
- HIV/AIDS, Vitamin D Deficiency, Smoker Lung
- Interventions
- Vitamin D3 450,000 IU orally
- Drug
- Lead sponsor
- Emory University
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 7 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2018
- U.S. locations
- 2
- States / cities
- Atlanta, Georgia
- Conditions
- Accidental Fall
- Interventions
- Gait and balance assessment, Medication review, Comorbidity review, Fall history, Assessment of feet/footwear, Assessment of visual acuity, Home safety risk assessment, Vitamin D Deficiency
- Behavioral
- Lead sponsor
- National Opinion Research Center
- Other
- Eligibility
- 65 Years and older
- Enrollment
- 780 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2020 – 2023
- U.S. locations
- 1
- States / cities
- Atlanta, Georgia
- Conditions
- HIV Infection
- Interventions
- Alendronate, Placebo, Calcium carbonate/vitamin D
- Drug · Dietary Supplement
- Lead sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
- NIH
- Eligibility
- 11 Years to 24 Years
- Enrollment
- 52 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2017
- U.S. locations
- 7
- States / cities
- Los Angeles, California • Miami, Florida • Tampa, Florida + 4 more
- Conditions
- Heart Failure
- Interventions
- Vitamin D3, Placebo
- Drug
- Lead sponsor
- University of Michigan
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 28 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2014
- U.S. locations
- 1
- States / cities
- Ann Arbor, Michigan
- 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
- 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
- Bone Disease, Metabolic
- Interventions
- Prune
- Dietary Supplement
- Lead sponsor
- San Diego State University
- Other
- Eligibility
- Female only
- Enrollment
- 200 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2024 – 2028
- U.S. locations
- 1
- States / cities
- San Diego, California