- Conditions
- Postmenopausal Women
- Interventions
- 10 vit. D deficient subjects take vit. D for 3 months.
- Procedure
- Lead sponsor
- University of Kansas
- Other
- Eligibility
- 50 Years to 90 Years · Female only
- Enrollment
- 40 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2004 – 2007
- U.S. locations
- 1
- States / cities
- Kansas City, Kansas
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 958
matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
- Conditions
- Vitamin D Deficiency, Metabolic Syndrome
- Interventions
- RDA Vitamin D3 only, Vitamin D2/3 Repletion only, Vitamin D2/3 Repletion + AEX, Vitamin D2/3 Repletion + RT
- Dietary Supplement · Other
- Lead sponsor
- Baltimore VA Medical Center
- Federal
- Eligibility
- 40 Years to 85 Years
- Enrollment
- 39 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2013
- U.S. locations
- 1
- States / cities
- Baltimore, Maryland
- Conditions
- Cystic Fibrosis
- Interventions
- Vitamin D Powder, Vitamin D Oil
- Dietary Supplement
- Lead sponsor
- Emory University
- Other
- Eligibility
- 18 Years to 59 Years
- Enrollment
- 17 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013 – 2015
- U.S. locations
- 1
- States / cities
- Atlanta, Georgia
- Conditions
- Vitamin D Deficiency
- Interventions
- Vitamin D, 25(OH)D3
- Drug
- Lead sponsor
- University of California, Los Angeles
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 35 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2014 – 2019
- U.S. locations
- 2
- States / cities
- Los Angeles, California
- Conditions
- Vitamin D Deficiency
- Interventions
- Redoxon VI, placebo
- Dietary Supplement
- Lead sponsor
- Oregon State University
- Other
- Eligibility
- 55 Years to 75 Years
- Enrollment
- 42 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2016 – 2019
- U.S. locations
- 1
- States / cities
- Corvallis, Oregon
- Conditions
- Vitamin D Insufficiency, Vitamin D Deficiency
- Interventions
- Cholecalciferol (vitamin D3)
- Dietary Supplement
- Lead sponsor
- University of Wisconsin, Madison
- Other
- Eligibility
- 55 Years and older · Female only
- Enrollment
- 108 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2007 – 2011
- U.S. locations
- 1
- States / cities
- Madison, Wisconsin
- Conditions
- Age-related Macular Degeneration
- Interventions
- Omega-3 fatty acids (fish oil), Vitamin D3, Vitamin D3 placebo, Fish oil placebo
- Drug · Dietary Supplement
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 25,871 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2024
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Cutaneous Squamous Cell Carcinoma, Actinic Keratoses, Skin Cancer, Organ Transplant Recipients, Immunotherapy
- Interventions
- Calcipotriol Only Product in Cutaneous Dose Form, Vaseline, Topical 5FU
- Drug
- Lead sponsor
- Massachusetts General Hospital
- Other
- Eligibility
- 50 Years and older
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2026 – 2030
- U.S. locations
- 2
- States / cities
- Boston, Massachusetts • St Louis, Missouri
- Conditions
- Hypertension
- Interventions
- Vitamin D, calcitriol, Placebo
- Drug
- Lead sponsor
- Atlanta VA Medical Center
- Federal
- Eligibility
- 18 Years to 80 Years
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2007 – 2011
- U.S. locations
- 1
- States / cities
- Decatur, Georgia
- Conditions
- Vitamin D 25 OH Deficiency
- Interventions
- Cholecalciferol, Cholecalciferol 5,000 IU
- Dietary Supplement
- Lead sponsor
- University of South Florida
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 56 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2009 – 2011
- U.S. locations
- 1
- States / cities
- Tampa, Florida
- Conditions
- Neuropathic Pain
- Interventions
- Ergocalciferol Capsules, Cholecalciferol Capsules
- Drug · Dietary Supplement
- Lead sponsor
- Virginia Commonwealth University
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 120 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022 – 2030
- U.S. locations
- 1
- States / cities
- Richmond, Virginia
- Conditions
- Pregnancy
- Interventions
- Calcium or Placebo
- Dietary Supplement
- Lead sponsor
- UCSF Benioff Children's Hospital Oakland
- Other
- Eligibility
- 18 Years to 45 Years · Female only
- Enrollment
- 65 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2010 – 2013
- U.S. locations
- 1
- States / cities
- Oakland, California
- 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
- X-linked Adrenoleukodystrophy
- Interventions
- vitamin D3
- Dietary Supplement
- Lead sponsor
- Stanford University
- Other
- Eligibility
- 18 Months to 25 Years · Male only
- Enrollment
- 21 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2016 – 2020
- U.S. locations
- 1
- States / cities
- Palo Alto, California
- Conditions
- Carcinoma, Non-Small-Cell Lung
- Interventions
- calcitriol + docetaxel
- Drug
- Lead sponsor
- Novacea
- Industry
- Eligibility
- 18 Years and older
- Enrollment
- 80 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2003 – 2005
- U.S. locations
- 11
- States / cities
- Berkeley, California • Vallejo, California • Denver, Colorado + 8 more
- Conditions
- Systemic Lupus Erythematosus
- Interventions
- Vitamin D3 6000 IU, Vitamin D3 400 IU
- Drug
- Lead sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
- NIH
- Eligibility
- 5 Years to 20 Years
- Enrollment
- 7 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2013 – 2014
- U.S. locations
- 13
- States / cities
- Los Angeles, California • Palo Alto, California • San Francisco, California + 9 more
- Conditions
- Prediabetes, Type 2 Diabetes (T2DM)
- Interventions
- Vitamin D (Cholecalciferol ), Placebo
- Drug
- Lead sponsor
- Tufts Medical Center
- Other
- Eligibility
- 30 Years to 74 Years
- Enrollment
- 100 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2026 – 2031
- U.S. locations
- 1
- States / cities
- Boston, Massachusetts
- Conditions
- Perimenopausal Bone Loss
- Interventions
- Prunes, Calcium supplement, Vitamin D Supplement
- Dietary Supplement
- Lead sponsor
- Penn State University
- Other
- Eligibility
- 44 Years to 55 Years · Female only
- Enrollment
- 124 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2025 – 2029
- U.S. locations
- 1
- States / cities
- University Park, Pennsylvania
- Conditions
- Skin Cancer, Non-Melanoma
- Interventions
- Not listed
- Lead sponsor
- University of Alabama at Birmingham
- Other
- Eligibility
- 50 Years and older
- Enrollment
- 200 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2012 – 2017
- U.S. locations
- 1
- States / cities
- Birmingham, Alabama
- 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
- Conditions
- Vitamin D Deficiency, End-stage Renal Disease
- Interventions
- Cholecalciferol
- Drug
- Lead sponsor
- Mehrotra, Anita, M.D.
- Individual
- Eligibility
- 18 Years and older
- Enrollment
- 116 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2010 – 2013
- U.S. locations
- 1
- States / cities
- New York, New York
- Conditions
- Female Sexual Dysfunction, Polycystic Ovary Syndrome
- Interventions
- Vitamin D, Hormonal contraception
- Dietary Supplement · Drug
- Lead sponsor
- Wright State University
- Other
- Eligibility
- 18 Years to 40 Years · Female only
- Enrollment
- 47 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2020
- U.S. locations
- 2
- States / cities
- Dayton, Ohio • Hershey, Pennsylvania
- Conditions
- Vitamin D Deficiency
- Interventions
- Treatment
- Drug
- Lead sponsor
- Johns Hopkins All Children's Hospital
- Other
- Eligibility
- 36 Months to 18 Years
- Enrollment
- 26 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2016 – 2019
- U.S. locations
- 1
- States / cities
- St. Petersburg, Florida
- Conditions
- Graves Disease, Graves' Disease, Hyperthyroidism
- Interventions
- Ergocalciferol 50,000 IU, Methimazole
- Drug
- Lead sponsor
- Northwell Health
- Other
- Eligibility
- 9 Years to 17 Years
- Enrollment
- 30 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2025 – 2027
- U.S. locations
- 1
- States / cities
- New Hyde Park, New York