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ClinicalTrials.gov public records Last synced Oct 20, 2026, 10:14 AM EDT

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Showing 193–216 of 604 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Dietary Deficiency Clear all
Completed Not applicable Interventional

Effect of Diet-induced Weight Loss on HIV-associated Metabolic Syndrome

NCT00857298
View directory record Official record
Conditions
HIV (Human Immunodeficiency Virus), Metabolic Syndrome, HIV Infections
Interventions
Dietary Intervention
Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 16, 2015 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effects of Vitamin D Supplementation on Strength, Bone Density, and Injury Risk in Collegiate Athletes

NCT03151174
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D 10000 UNT, Vitamin D 5000 UNT
Drug
Lead sponsor
Virginia Polytechnic Institute and State University
Other
Eligibility
18 Years to 30 Years
Enrollment
68 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Blacksburg, Virginia
Source: ClinicalTrials.gov public record
Updated Oct 15, 2024 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional

Efficacy of Vitamin D Supplementation in Obese Children

NCT02956408
View directory record Official record
Conditions
Obesity, Pediatric, Obesity, Childhood, Obesity, Morbid, Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
5 Years to 11 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 5, 2020 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Supplementation in Warfighters

NCT02954549
View directory record Official record
Conditions
Vitamin D Deficiency Disease
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Madigan Army Medical Center
Federal
Eligibility
18 Years and older
Enrollment
131 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated May 10, 2019 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Phase 2 Interventional Results available

Reduced Carbohydrate Versus Fat in Obese Subjects

NCT00846040
View directory record Official record
Conditions
Obesity
Interventions
Reduced fat diet, Reduced carbohydrate diet, Drug: f-18 fallypride, fMRI, PET
Other · Drug · Device
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 45 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 15, 2021 · Synced Oct 20, 2026, 10:14 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) Trial

NCT03380091
View directory record Official record
Conditions
PCOS, Depression, Vitamin D Deficiency, Insulin Resistance
Interventions
Metformin, Vitamin D
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Feb 9, 2021 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Effects of Leptin Treatment on Weight Loss

NCT00050791
View directory record Official record
Conditions
Obesity
Interventions
Leptin, Very Low Calorie Diet
Drug · Behavioral
Lead sponsor
Rockefeller University
Other
Eligibility
20 Years to 45 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 19, 2010 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional Results available

Health Benefits of Vitamin D and Calcium in Women With PCOS (Polycystic Ovarian Syndrome)

NCT00743574
View directory record Official record
Conditions
Polycystic Ovarian Syndrome, Vitamin D Deficiency
Interventions
Vitamin D2 (Ergocalciferol), Medroxyprogesterone (Provera), Vitamin D3 (Cholecalciferol), Elemental Calcium
Dietary Supplement · Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 13, 2021 · Synced Oct 20, 2026, 10:14 AM EDT
Terminated Not applicable Interventional

Gemcitabine Compared With Pancreatic Enzyme Therapy Plus Specialized Diet (Gonzalez Regimen) in Treating Patients Who Have Stage II, Stage III, or Stage IV Pancreatic Cancer

NCT00003851
View directory record Official record
Conditions
Malnutrition, Pancreatic Cancer
Interventions
proteolytic enzymes, gemcitabine hydrochloride, Gonzalez regimen
Biological · Drug · Procedure
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2004
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 15, 2013 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effectiveness of a Nutraceutical in Raising Circulating Serum Vitamin, Mineral and Amino Acid Levels in Patients.

NCT04054505
View directory record Official record
Conditions
Vitamin Deficiency
Interventions
EZPAK, Placebo
Dietary Supplement
Lead sponsor
Optimal Health Research
Other
Eligibility
26 Years to 75 Years
Enrollment
275 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jul 10, 2024 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Knowledge of Nutritional Concerns in Physically Active Females

NCT05589077
View directory record Official record
Conditions
Nutritional Deficiency
Interventions
Education on Female Athlete Nutritional Concerns
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 25 Years · Female only
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 11, 2023 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluating Vitamin D Content in Mushrooms

NCT01815437
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Mushroom Vitamin D2, Cholecalciferol, Vitamin D2 - Ergocalciferol, Mushroom Extract
Dietary Supplement
Lead sponsor
Boston University
Other
Eligibility
18 Years to 64 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 27, 2017 · Synced Oct 20, 2026, 10:14 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Effects of Work Schedule and Sleep Patterns on Caregivers' Health

NCT01443156
View directory record Official record
Conditions
Obesity, Diabetes, Cancer, Metabolic Syndrome, Sleep Deprivation
Interventions
Not listed
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years and older
Enrollment
211 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Bend, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 2, 2023 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional

Diet and Exercise-Based Counseling Program Compared With a Standard Counseling Program in Patients With Early-Stage Prostate Cancer

NCT00044980
View directory record Official record
Conditions
Malnutrition, Prostate Cancer
Interventions
nutritional support, quality-of-life assessment
Procedure
Lead sponsor
Duke University
Other
Eligibility
18 Years to 120 Years · Male only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2006
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 23, 2017 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional

Vitamin D Supplementation in Older Women

NCT00472823
View directory record Official record
Conditions
Osteoporosis, Aging
Interventions
Vitamin D3, Calcium Citrate (Citracal)
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
57 Years and older · Female only
Enrollment
273 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 14, 2016 · Synced Oct 20, 2026, 10:14 AM EDT
Recruiting Not applicable Interventional

Enhanced Nutritional Optimization in LVAD Trial

NCT05655910
View directory record Official record
Conditions
Heart Failure, Gut Microbiome, Nutritional Deficiency
Interventions
Ensure Surgery Immunonutrition shake
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 31, 2025 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional

The Effect of Psyllium and Wheat Bran on Body Weight in People With Parkinson's Disease and Constipation Symptoms

NCT04829760
View directory record Official record
Conditions
Parkinson Disease
Interventions
Psyllium, Coarse wheat bran, Maltodextrin
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
40 Years to 85 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 20, 2024 · Synced Oct 20, 2026, 10:14 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

Efficacy Of Ergocalciferol In Adults According To BMI

NCT02435771
View directory record Official record
Conditions
Obesity, Vitamin D Deficiency
Interventions
Ergocalciferols
Drug
Lead sponsor
Walter Reed National Military Medical Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated May 11, 2017 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional Results available

Effect Of Biomechanical Stimulation On Skeletal Health In Adolescent And Young Women With Anorexia Nervosa

NCT01100567
View directory record Official record
Conditions
Anorexia Nervosa
Interventions
Low-magnitude mechanical stimulation platform
Device
Lead sponsor
Boston Children's Hospital
Other
Eligibility
11 Years to 25 Years · Female only
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 17, 2017 · Synced Oct 20, 2026, 10:14 AM EDT
Terminated Phase 2 Interventional Results available

Vitamin D3 Treatment in Pediatric Systemic Lupus Erythematosus

NCT01709474
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Dec 17, 2015 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Phase 3 Interventional

Open Label Trial Assessing Safety and Efficacy of Burosumab (KRN23), in a Patient With ENS and Hypophosphatemic Rickets

NCT03581591
View directory record Official record
Conditions
Hypophosphatemia, Hypophosphatemic Rickets, Pain, Chronic
Interventions
Burosumab
Biological
Lead sponsor
Redwood Dermatology Sciences
Other
Eligibility
Up to 18 Years · Female only
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Clinton, Utah
Source: ClinicalTrials.gov public record
Updated Jan 18, 2020 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Phase 2 Interventional

The Healthy Life Choices Project in HIV-Positive Patients

NCT00017810
View directory record Official record
Conditions
Diarrhea, HIV Infections
Interventions
Dietary intervention, HIV Self-Care
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2003
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 17, 2021 · Synced Oct 20, 2026, 10:14 AM EDT
Completed Not applicable Interventional

BioFe, Medical Food for the Dietary Management of Iron Deficiency

NCT03210168
View directory record Official record
Conditions
Iron Deficiency
Interventions
BioFe Medical Food
Other
Lead sponsor
Sidero Bioscience, LLC
Industry
Eligibility
18 Years to 80 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
3
States / cities
Lansdale, Pennsylvania • Scottdale, Pennsylvania • Smithfield, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 2, 2020 · Synced Oct 20, 2026, 10:14 AM EDT
Not listed Not applicable Interventional

Effect of Vitamin D Status and Repletion on Postoperative Total Joint Arthroplasty Complications

NCT04229368
View directory record Official record
Conditions
Hip Arthropathy, Knee Arthropathy, Vitamin D Deficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 16, 2023 · Synced Oct 20, 2026, 10:14 AM EDT