- Conditions
- Chronic Kidney Disease, Secondary Hyperparathyroidism, Chronic Renal Insufficiency, Chronic Renal Failure
- Interventions
- CTA018 Injection
- Drug
- Lead sponsor
- OPKO IP Holdings II, Inc.
- Industry
- Eligibility
- 18 Years to 80 Years
- Enrollment
- 41 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2008 – 2010
- U.S. locations
- 5
- States / cities
- Pembroke Pines, Florida • Meridian, Idaho • Springfield, Massachusetts + 2 more
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 are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.
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 24
matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
- Conditions
- Anemia, Vitamin D Deficiency
- Interventions
- Not listed
- Lead sponsor
- Avera McKennan Hospital & University Health Center
- Other
- Eligibility
- 30 Years to 50 Years
- Enrollment
- 50 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2013
- U.S. locations
- 1
- States / cities
- Sioux Falls, South Dakota
- Conditions
- Type 2 Diabetes
- Interventions
- Cholecalciferol, Placebo
- Drug
- Lead sponsor
- Tufts Medical Center
- Other
- Eligibility
- 25 Years to 75 Years
- Enrollment
- 127 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2015
- U.S. locations
- 2
- States / cities
- Boston, Massachusetts • Cincinnati, Ohio
- Conditions
- Damage Muscle, Body Weight Changes, Performance Enhancing Product Use
- Interventions
- Pre-workout plus and Protein recovery plus, Placebo, 6-week resistance training program
- Dietary Supplement · Other
- Lead sponsor
- Pharmanex
- Industry
- Eligibility
- 25 Years to 50 Years
- Enrollment
- 69 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2021 – 2022
- U.S. locations
- 1
- States / cities
- Chapel Hill, North Carolina
- Conditions
- Musculoskeletal Pain
- Interventions
- Vitamin D 2, Vitamin D2 Placebo
- Drug
- Lead sponsor
- University of North Carolina, Chapel Hill
- Other
- Eligibility
- 18 Years to 65 Years
- Enrollment
- 71 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2023 – 2024
- U.S. locations
- 4
- States / cities
- Worcester, Massachusetts • St Louis, Missouri • Camden, New Jersey + 1 more
- Conditions
- Osteoporosis
- Interventions
- alendronate with cholecalciferol, calcium carbonate with cholecalciferol, Falls prevention measures
- Drug · Behavioral
- Lead sponsor
- Hebrew SeniorLife
- Other
- Eligibility
- 65 Years and older
- Enrollment
- 29 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2007 – 2008
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Vitamin D Deficiency, Insulin Resistance, Insulin Sensitivity, Obesity
- Interventions
- Not listed
- Lead sponsor
- University of Alabama at Birmingham
- Other
- Eligibility
- 13 Years to 18 Years · Female only
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2008 – 2010
- U.S. locations
- 1
- States / cities
- Birmingham, Alabama
- Conditions
- Premature Infants
- Interventions
- cholecalciferal, cholecalciferol
- Dietary Supplement
- Lead sponsor
- University of Nebraska
- Other
- Eligibility
- 23 Weeks to 32 Weeks
- Enrollment
- 32 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2013
- U.S. locations
- 1
- States / cities
- Omaha, Nebraska
- Conditions
- Deficiency of Vitamin D3, COPD
- Interventions
- Cholecalciferol, multivitamin, Placebo
- Dietary Supplement
- Lead sponsor
- University of Pittsburgh
- Other
- Eligibility
- 50 Years to 85 Years
- Enrollment
- 10 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2016 – 2018
- U.S. locations
- 1
- States / cities
- Pittsburgh, Pennsylvania
- Conditions
- Osteoporosis, Osteopenia
- Interventions
- Fiber Pill, Melatonin, Strontium citrate, Vitamins D3 and K2
- Dietary Supplement
- Lead sponsor
- Duquesne University
- Other
- Eligibility
- Female only
- Enrollment
- 23 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2013 – 2017
- U.S. locations
- 1
- States / cities
- Pittsburgh, Pennsylvania
- Conditions
- IBD, Ulcerative Colitis, Crohn Disease
- Interventions
- Vitamin D3
- Drug
- Lead sponsor
- Boston Children's Hospital
- Other
- Eligibility
- 7 Years to 25 Years
- Enrollment
- 50 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2023
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- 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
- Healthy Participants
- Interventions
- Influenza virus vaccine, Vitamins A and D, Placebo
- Biological · Dietary Supplement · Other
- Lead sponsor
- St. Jude Children's Research Hospital
- Other
- Eligibility
- 2 Years to 8 Years
- Enrollment
- 87 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2016 – 2018
- U.S. locations
- 1
- States / cities
- Memphis, Tennessee
- 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
- Breast Cancer
- Interventions
- Celecoxib, Placebo, Cholecalciferol
- Drug
- Lead sponsor
- Hartford Hospital
- Other
- Eligibility
- 18 Years and older · Female only
- Enrollment
- 45 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2008 – 2016
- U.S. locations
- 1
- States / cities
- Grand Forks, North Dakota
- Conditions
- Vitamin D Deficiency, Cognitive Decline
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- University of California, Davis
- Other
- Eligibility
- 65 Years to 90 Years
- Enrollment
- 180 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2026
- U.S. locations
- 1
- States / cities
- Walnut Creek, California
- Conditions
- Vitamin D Deficiency
- Interventions
- Placebo, 800 IU/day vitamin D supplementation with feedings in the first 28 days after birth, Usual Care
- Dietary Supplement · Other
- Lead sponsor
- The University of Texas Health Science Center, Houston
- Other
- Eligibility
- 24 Hours to 96 Hours
- Enrollment
- 180 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022 – 2027
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- Colorectal Polyps, Colorectal Adenoma, Adenocarcinoma
- Interventions
- placebo and Calcitriol, Calcium and Calcitriol
- Drug
- Lead sponsor
- Rockefeller University
- Other
- Eligibility
- 48 Years to 72 Years
- Enrollment
- 10 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2005 – 2009
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Vitamin D Deficiency, Rickets, Infant Nutrition Disorders
- Interventions
- Vitamin D3
- Dietary Supplement
- Lead sponsor
- Mayo Clinic
- Other
- Eligibility
- 1 Month to 50 Years
- Enrollment
- 80 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2011
- U.S. locations
- 1
- States / cities
- Rochester, Minnesota
- Conditions
- Vitamin D3 Deficiency
- Interventions
- Vitamin D3 4000 IU in gummy form, Placebo gummy vitamin
- Drug
- Lead sponsor
- Medical University of South Carolina
- Other
- Eligibility
- 18 Years to 45 Years · Female only
- Enrollment
- 342 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2013 – 2018
- U.S. locations
- 1
- States / cities
- Charleston, South Carolina
- Conditions
- Relapsing Remitting Multiple Sclerosis
- Interventions
- Vitamin D3
- Drug
- Lead sponsor
- Johns Hopkins University
- Other
- Eligibility
- 18 Years to 50 Years
- Enrollment
- 172 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2012 – 2021
- U.S. locations
- 16
- States / cities
- Carmichael, California • San Francisco, California • Stanford, California + 12 more
- 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
- Osteoporosis
- Interventions
- Not listed
- Lead sponsor
- Oklahoma State University
- Other
- Eligibility
- 50 Years and older · Female only
- Enrollment
- 301 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2007 – 2011
- U.S. locations
- 1
- States / cities
- Oklahoma City, Oklahoma
- 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