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Showing 1–24 of 441 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Conditions
Prostate Cancer
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
19 Years to 90 Years · Male only
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2020
U.S. locations
2
States / cities
Charleston, South Carolina
Completed Phase 2 Interventional Results available

Pharmacological Ascorbate for Lung Cancer

NCT02420314
Conditions
Carcinoma, Non-Small-Cell Lung
Interventions
Paclitaxel, Carboplatin, Ascorbic Acid
Drug
Lead sponsor
Joseph J. Cullen, MD, FACS
Other
Eligibility
18 Years and older
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
Iowa City, Iowa
Conditions
Wrinkle, Aging
Interventions
Retinol face cream, Placebo face cream
Dietary Supplement
Lead sponsor
Chemist Confessions, Inc.
Industry
Eligibility
30 Years to 50 Years · Female only
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Santa Monica, California
Completed Phase 3 Interventional Accepts healthy volunteers

Echinacea, Propolis and Vitamin C for URI Prevention in Preschoolers

NCT00231218
Conditions
Common Cold, Gastroenteritis
Interventions
dietary supplement--echinacea, propolis, and vitamin c
Drug
Lead sponsor
The Cleveland Clinic
Other
Eligibility
3 Years to 6 Years
Enrollment
104 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Cleveland, Ohio
Completed No phase listed Observational Accepts healthy volunteers

A Study of Vitamin D in Subjects With Alopecia Areata

NCT01328678
Conditions
Alopecia Areata
Interventions
Not listed
Lead sponsor
Avera McKennan Hospital & University Health Center
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Sioux Falls, South Dakota
Conditions
Hand and Foot Syndrome
Interventions
Vitamin B 6, placebo
Drug
Lead sponsor
Cook County Health
Government
Eligibility
Not listed
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Chicago, Illinois
Conditions
Capsular Contractures
Interventions
Trental
Drug
Lead sponsor
Legacy Health System
Other
Eligibility
18 Years and older · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Portland, Oregon
Completed Phase 3 Interventional Results available

Vitamin C, Thiamine, and Steroids in Sepsis

NCT03509350
Conditions
Sepsis
Interventions
Vitamin C, Thiamine, Hydrocortisone, Vitamin C Placebo, Thiamine Placebo, Hydrocortisone Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
501 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
43
States / cities
Phoenix, Arizona • Tucson, Arizona • Los Angeles, California + 30 more
Conditions
Glioblastoma, Glioblastoma Multiforme
Interventions
BPM31510, Vitamin K1, Temozolomide (TMZ), Radiation
Drug · Other · Radiation
Lead sponsor
BPGbio
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
11
States / cities
Los Angeles, California • Palo Alto, California • Santa Barbara, California + 7 more
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Topical Vitamin K, Vitamin K and Retinol, and Arnica on Post-Laser Bruising

NCT00363038
Conditions
Ecchymosis
Interventions
Petrolatum United States Pharmacopeia (USP), Vitamin K and retinol ointment, Arnica ointment, Vitamin K ointment
Drug
Lead sponsor
Northwestern University
Other
Eligibility
20 Years to 60 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Chicago, Illinois
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Large Randomized Trial of Vitamin D, Omega-3 Fatty Acids and Cognitive Decline

NCT01669915
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
Completed Not applicable Interventional Accepts healthy volunteers

Comparative Effectiveness of Vitamin D and Repletion Strategies

NCT01524874
Conditions
Hypovitaminosis D, Insulin Resistance, Diabetes
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Bastyr University
Other
Eligibility
18 Years to 65 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
2
States / cities
Kailua-Kona, Hawaii • Kenmore, Washington
Conditions
X-linked Hypophosphatemia
Interventions
Placebo, KRN23
Drug
Lead sponsor
Kyowa Kirin Co., Ltd.
Industry
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
4
States / cities
New Haven, Connecticut • Indianapolis, Indiana • Durham, North Carolina + 1 more
Conditions
Pancreatic Neoplasms
Interventions
Vitamin E δ-Tocotrienol
Drug
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2016
U.S. locations
1
States / cities
Tampa, Florida
Conditions
Healthy Volunteers
Interventions
Placebo, Canagliflozin
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Conditions
Parkinson's Disease (PD)
Interventions
Not listed
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
288 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Rochester, New York
Conditions
Obesity, Glucose Intolerance, Inflammation
Interventions
Placebo, Vitamin D 3 cholecalciferol
Dietary Supplement
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
9 Years to 19 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Columbia, Missouri
Conditions
Spermatogenesis and Semen Disorders, Infertility, Male
Interventions
Power Prenatal for Sperm
Dietary Supplement
Lead sponsor
The Bird and Be Co Inc
Industry
Eligibility
18 Years to 50 Years · Male only
Enrollment
174 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Encino, California
Conditions
Acute Coronary Syndromes
Interventions
Apixaban, vitamin K antagonist, Acetylsalicylic acid, Acetylsalicylic acid placebo
Drug · Other
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years to 95 Years
Enrollment
4,614 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
143
States / cities
Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 125 more
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
Conditions
Gastric Bypass, Parathyroid Hormone
Interventions
Paricalcitol, Cholecalciferol, Placebo
Drug
Lead sponsor
Kerstyn C. Zalesin, M.D.
Other
Eligibility
18 Years to 100 Years
Enrollment
49 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2015
U.S. locations
1
States / cities
Royal Oak, Michigan
Not listed Not applicable Interventional Accepts healthy volunteers

Postprandial Urolithin Patterns Following Pecan Consumption

NCT06140602
Conditions
Change in Plasma Urolithins and Vitamin E
Interventions
Intervention shake
Other
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 30 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Athens, Georgia
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
Follicular Lymphoma, Small Lymphocytic Lymphoma, Marginal Zone Lymphoma, Mucosal-Associated Lymphoid Tissue Lymphoma
Interventions
Vitamin D, Rituximab, Placebo
Dietary Supplement · Biological · Other
Lead sponsor
Jonathan Friedberg
Other
Eligibility
18 Years and older
Enrollment
211 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
7
States / cities
Miami, Florida • Atlanta, Georgia • Iowa City, Iowa + 4 more