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ClinicalTrials.gov public records Last synced Jun 10, 2026, 3:29 AM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Conditions
Vitamin D Deficiency
Interventions
Cholecalciferol
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
13 Years to 45 Years
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Augusta, Georgia
Conditions
Vitamin C Deficiency, Smoking, Surgery, Surgery--Complications, Wound, Wound Complication, Wound Infection, Wound Dehiscence, Wound of Skin, Mandible Fracture, Mandible Open Fracture, Mandible Closed Fracture, Mandibular Fractures, Ascorbic Acid Deficiency, Oxidative Stress, Inflammation
Interventions
Vitamin C, Placebo
Dietary Supplement · Other
Lead sponsor
Hennepin Healthcare Research Institute
Other
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Minneapolis, Minnesota
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
Healthy, Deficiency Disease
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
Not listed
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Completed No phase listed Observational Accepts healthy volunteers

Vitamin D Status and the Adequacy of Vitamin D Intake in Early Preterm Infants

NCT01793402
Conditions
Hypovitaminosis D
Interventions
Not listed
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
1 Day to 1 Week
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Cincinnati, Ohio
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D and Adipose Tissue Inflammation

NCT01477034
Conditions
Vitamin D Deficiency, Obesity, Type 2 Diabetes Mellitus, Intestinal Permeability
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Seattle, Washington
Conditions
Burns, Ascorbic Acid Deficiency, Burn Shock, Burn Degree Second, Burn Degree Third, Fluid and Electrolyte Imbalance
Interventions
Vitamin C
Dietary Supplement
Lead sponsor
Arrowhead Regional Medical Center
Other
Eligibility
Not listed
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Colton, California
Completed Not applicable Interventional Results available

Vitamin D Supplementation in Kidney Disease

NCT01229878
Conditions
Renal Dialysis, Vitamin D Deficiency
Interventions
Cholecalciferol (Vitamin D)
Dietary Supplement
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
45 Years to 89 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2022
U.S. locations
1
States / cities
The Bronx, New York
Conditions
Obesity, Hypertension
Interventions
Lifestyle Modification Program, Usual Care and Reading Materials
Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
21 Years and older
Enrollment
365 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
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
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
1
States / cities
Galveston, Texas
Completed No phase listed Observational

Corneal Nerve Structure in Sjogren's

NCT03203382
Conditions
Sjogren's Syndrome, Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Conditions
Diabetes Mellitus, Vitamin D Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Ascension Health
Industry
Eligibility
34 Years to 69 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Flint, Michigan
Completed Not applicable Interventional Accepts healthy volunteers

HealthyWE: Achieving a Healthy Weight and Reducing Pain

NCT07095673
Conditions
Obesity &Amp; Overweight
Interventions
HealthyWE
Behavioral
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
19 Years and older
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Camden, New Jersey
Conditions
Intestinal Failure-associated Liver Disease
Interventions
Not listed
Lead sponsor
Protara Therapeutics
Industry
Eligibility
12 Years to 80 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
10
States / cities
Los Angeles, California • Kissimmee, Florida • Chicago, Illinois + 7 more
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effects of Vitamin B12 Treatment in Singers

NCT03437824
Conditions
Vitamin B 12 Deficiency
Interventions
Cyanocobalamin, Placebo
Drug
Lead sponsor
University of Southern California
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Conditions
Mesopic Vision, Night Vision Loss
Interventions
phentolamine ophthalmic solution 0.75%, a non-selective alpha-1 and alpha-2 adrenergic antagonist, Placebo
Drug
Lead sponsor
Ocuphire Pharma, Inc.
Industry
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
25
States / cities
Pheonix, Arizona • Scottsdale, Arizona • Bakersfield, California + 20 more
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Management of Severe Acute Malnutrition in SCD, in Northern Nigeria

NCT03634488
Conditions
Sickle Cell Anemia, Severe Acute Malnutrition
Interventions
hydroxyurea (20mg/kg/day), Ready-to-use therapeutic food
Drug · Dietary Supplement
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
5 Years to 12 Years
Enrollment
132 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Nashville, Tennessee
Conditions
Cardiac Rehabilitation, Nutrition, Healthy, Nutrition Poor
Interventions
Usual Care, Navigation, Text Messaging
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
San Francisco, California
Completed Not applicable Interventional Accepts healthy volunteers

Challenge!, a Health Promotion/ Obesity Prevention Program for Teens

NCT00746083
Conditions
Overweight
Interventions
Challenge!
Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
11 Years to 16 Years
Enrollment
235 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2007
U.S. locations
1
States / cities
Baltimore, Maryland
Conditions
Malnutrition, Child, Wasting Disease, Stunting, Malnutrition, Malnutrition, Mother
Interventions
Cash only, Cash + Social Behavior Change Communication, Cash + top-up cash
Other
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
6 Months and older
Enrollment
3,384 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Weight on Vitamin D Dose Response

NCT01013584
Conditions
Obesity, Vitamin D Deficiency
Interventions
cholecalciferol
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
19 Years to 60 Years · Male only
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Omaha, Nebraska
Completed Not applicable Interventional Accepts healthy volunteers

Nutrition, Vision, and Cognition in Sport Study: Beef

NCT04427852
Conditions
Cognitive Change, Nutrient Deficiency, Nutritional Anemia, Visual Spatial Processing, Diet, Healthy, Diet; Deficiency, Dietary Deficiency, Dietary B12 Deficiency, Dietary Zinc Deficiency, Dietary Vitamin B12 Deficiency Anemia, Dietary Deficiency of Selenium and Vitamin E
Interventions
30 day Daily consumption of 1 serving of beef, 30 day Daily consumption of 1 serving of the vegatable protein source
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
College Station, Texas
Conditions
Hypophosphatasia (HPP)
Interventions
asfotase alfa
Biological
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
Up to 36 Months
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
6
States / cities
Little Rock, Arkansas • Wilmington, Delaware • Springfield, Missouri + 3 more
Conditions
Growth Disorders, Dietary Exposure, Child Development, Bone Development Abnormal, Body Weight, Child Malnutrition
Interventions
TruHeight Growth Protein Shake
Dietary Supplement
Lead sponsor
TruHeight Vitamins
Industry
Eligibility
4 Years to 17 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
San Francisco, California