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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Poor Nutrition Clear all
Terminated Phase 1 Interventional

Effect of High-Dose Vitamin D3 in Smokers and Non-Smokers With and Without HIV

NCT03270709
View directory record Official record
Conditions
HIV/AIDS, Vitamin D Deficiency, Smoker Lung
Interventions
Vitamin D3 450,000 IU orally
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 20, 2021 · Synced Jul 22, 2026, 4:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Weight on Vitamin D Dose Response

NCT01013584
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jun 25, 2012 · Synced Jul 22, 2026, 4:56 AM EDT
Completed Not applicable Interventional

Evaluation of MF4637 for Correcting the Omega-3 Nutritional Deficiency in NAFLD Patients

NCT02923804
View directory record Official record
Conditions
Non Alcoholic Fatty Liver
Interventions
Omega-3, Olive oil
Dietary Supplement
Lead sponsor
Pronova BioPharma
Industry
Eligibility
18 Years and older
Enrollment
172 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
7
States / cities
Hialeah, Florida • Lake Worth, Florida • Lauderdale Lakes, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2018 · Synced Jul 22, 2026, 4:56 AM EDT
Completed Phase 4 Interventional

A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT

NCT03176849
View directory record Official record
Conditions
Vitamin D Deficiency, Stem Cell Transplant Complications, Pediatric Cancer, Blood Disorder, Pediatric Acute Myeloid Leukemia, Pediatric Acute Lymphoid Leukemia, Myelodysplastic Syndromes, Sickle Cell Anemia in Children, Aplastic Anemia, Thalassemia in Children
Interventions
Vitamin D3, Standard Vitamin D3 Supplementation
Dietary Supplement
Lead sponsor
Phoenix Children's Hospital
Other
Eligibility
1 Year to 25 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 16, 2020 · Synced Jul 22, 2026, 4:56 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 10, 2023 · Synced Jul 22, 2026, 4:56 AM EDT
Completed No phase listed Observational

Prevalence of Liver Disease in Patients Dependent on Parenteral Nutrition

NCT05011370
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Oct 2, 2023 · Synced Jul 22, 2026, 4:56 AM EDT
Not yet recruiting Not applicable Interventional

Development and Testing of Nutritional Algorithms (NACHO)

NCT05825469
View directory record Official record
Conditions
Nutrition Poor, Nutritional Deficiency, Quality of Life
Interventions
Nutrition Algorithm
Behavioral
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Jul 22, 2026, 4:56 AM EDT
Completed No phase listed Observational

An Observational Study to Assess Malnutrition Risk

NCT06709001
View directory record Official record
Conditions
Malnutrition
Interventions
Not listed
Lead sponsor
Abbott Nutrition
Industry
Eligibility
1 Year to 5 Years
Enrollment
206 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 9, 2025 · Synced Jul 22, 2026, 4:56 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Personalized Nutrition During Pregnancy

NCT07508709
View directory record Official record
Conditions
Nutrition, Healthy, Nutrition Poor, Pregnancy Related
Interventions
Ninemoons app
Other
Lead sponsor
Olivia Sher
Other
Eligibility
18 Years to 62 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Jul 22, 2026, 4:56 AM EDT
Recruiting Not applicable Interventional

Nutritional Prehabilitation to Improve Cancer Outcomes (N-PICO)

NCT07072377
View directory record Official record
Conditions
Malnutrition, Cancer-related Malnutrition, Quality of Life (QOL), Nutritional Support, Nutritional Interventions, Rural Health
Interventions
Intensity of Nutritional Intervention, Remote or In-Person
Behavioral
Lead sponsor
University of Vermont Medical Center
Other
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Jul 22, 2026, 4:56 AM EDT
Terminated No phase listed Observational

Magnesium as a Mediator of Bone and Vitamin D Metabolism in Patients on Antiepileptic Drug Therapy

NCT03471481
View directory record Official record
Conditions
Epilepsy, Magnesium Deficiency, Vitamin D Deficiency
Interventions
No Intervention. Study is Cross Sectional in nature
Other
Lead sponsor
Drexel University
Other
Eligibility
18 Years to 70 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 28, 2021 · Synced Jul 22, 2026, 4:56 AM EDT
Completed Phase 2 Interventional Results available

Correction of Vitamin D Levels and Its Effect on Insulin Resistance and Weight Gain in Obese Youth

NCT02168660
View directory record Official record
Conditions
Obesity, Insulin Resistance, Vitamin D Deficiency
Interventions
Vitamin D3
Drug
Lead sponsor
Perrin C White, MD
Other
Eligibility
6 Years to 17 Years
Enrollment
109 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Dec 8, 2019 · Synced Jul 22, 2026, 4:56 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Effect Of Vitamin D On Measures Of Bone Health And Gene Expression

NCT01696409
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
400 IU vitamin D3, 2000 IU vitamin D3
Dietary Supplement
Lead sponsor
Boston University
Other
Eligibility
18 Years to 70 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 3, 2017 · Synced Jul 22, 2026, 4:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children

NCT01050387
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
6 Months to 6 Years
Enrollment
193 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 4, 2014 · Synced Jul 22, 2026, 4:56 AM EDT
Completed Phase 1 Interventional

Effects of Treating Vitamin D Deficiency in Poorly Controlled Type 2 Diabetes

NCT01855321
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Vitamin D, Placebo
Drug
Lead sponsor
University of Florida
Other
Eligibility
30 Years to 65 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 25, 2015 · Synced Jul 22, 2026, 4:56 AM EDT
Terminated No phase listed Observational

Effect of Vitamin D Supplementation on In-vitro Fertilization (IVF) Outcomes

NCT01419743
View directory record Official record
Conditions
Infertility, Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 38 Years · Female only
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
3
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 18, 2014 · Synced Jul 22, 2026, 4:56 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Partners in Children's Health (CSN): A Randomized Trial of an Attachment Based Intervention

NCT06002685
View directory record Official record
Conditions
Respiratory Disease, Inflammation, Insufficient Sleep, Digestive Disease, Skin Conditions, Body Mass Index, Infections, Allergies, Congestion, Antibiotic Use, Overweight and Obesity
Interventions
Attachment and Biobehavioral Catch-Up, Home-Based Book-of-the-Week
Behavioral · Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
8 Months to 12 Months
Enrollment
260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Jul 22, 2026, 4:56 AM EDT
Terminated Phase 1 Interventional

Vitamin D Supplementation as Non-toxic Immunomodulation in Children With Crohn's Disease

NCT01046773
View directory record Official record
Conditions
Crohn's Disease, Vitamin D Deficiency
Interventions
Cholecalciferol
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
8 Years to 18 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 6, 2018 · Synced Jul 22, 2026, 4:56 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Controlled Trial of Prenatal Vitamin D3 Supplementation to Prevent Vitamin D Deficiency in Mothers and Their Infants

NCT00610688
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Prenatal Vitamin, Cholecalciferol (Vitamin D3)
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
192 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 18, 2021 · Synced Jul 22, 2026, 4:56 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Family Relationships and Nutrition in TGGD Youth and Young Adults

NCT05163860
View directory record Official record
Conditions
Family Relations, Nutrition Disorders, Health Behavior, Transgenderism
Interventions
Survey
Other
Lead sponsor
St. Louis University
Other
Eligibility
12 Years and older
Enrollment
714 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 8, 2022 · Synced Jul 22, 2026, 4:56 AM EDT
Terminated Early Phase 1 Interventional

Effects of Vitamin D on Renin Expression in Hypertensive Patients

NCT00585442
View directory record Official record
Conditions
Hypertension, Vitamin D Deficiency
Interventions
calcitriol, Placebo
Drug
Lead sponsor
University of Utah
Other
Eligibility
55 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 26, 2016 · Synced Jul 22, 2026, 4:56 AM EDT
Withdrawn Not applicable Interventional

Spine and Tumor Screening and Supplementation

NCT03660540
View directory record Official record
Conditions
Spinal Injuries, Sarcoma, Nutritional Deficiency
Interventions
Juven
Dietary Supplement
Lead sponsor
University of Iowa
Other
Eligibility
18 Years to 100 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Feb 16, 2023 · Synced Jul 22, 2026, 4:56 AM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency

NCT01704079
View directory record Official record
Conditions
Chronic Kidney Disease, Hyperparathyroidism, Secondary, Vitamin D Deficiency
Interventions
CTAP101 30 μg capsules, Sugar pill to CTAP101 30 μg capsules
Drug · Other
Lead sponsor
OPKO IP Holdings II, Inc.
Industry
Eligibility
18 Years and older
Enrollment
216 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Bannockburn, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 12, 2025 · Synced Jul 22, 2026, 4:56 AM EDT
Completed Phase 3 Interventional

Dose Comparison of Amino Acids on Growth in Premature Neonates

NCT00120926
View directory record Official record
Conditions
Malnutrition
Interventions
Parenteral Nutrition
Drug
Lead sponsor
Pediatrix
Other
Eligibility
0 Years to 48 Hours
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
Florence, South Carolina
Source: ClinicalTrials.gov public record
Updated Sep 27, 2006 · Synced Jul 22, 2026, 4:56 AM EDT