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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Diet; Deficiency Clear all
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 21, 2026, 5:11 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Nutrition and Body Composition in Acute Lymphoblastic Leukemia

NCT01317940
View directory record Official record
Conditions
Precursor Cell Lymphoblastic Leukemia-Lymphoma, Vitamin D Deficiency
Interventions
Vitamin D and Calcium Citrate
Dietary Supplement
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
10 Years to 29 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 7, 2020 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a 10 Component Dietary Supplement on Health and the Quality of Life

NCT03052491
View directory record Official record
Conditions
Blood Pressure, HDL Low, Stress, Lung Function Decreased, Quality of Life, Energy Supply; Deficiency, Concentration Ability Impaired, Joint Instability, Immune Deficiency
Interventions
Stem Cell 100+
Dietary Supplement
Lead sponsor
Centagen, Inc.
Industry
Eligibility
35 Years to 80 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Feb 13, 2017 · Synced Jul 21, 2026, 5:11 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 1, 2020 · Synced Jul 21, 2026, 5:11 AM EDT
Terminated Phase 4 Interventional

Sustainability of Vitamin D Levels After Repletion With Ergocalciferol In Chronic Kidney Disease Stage 5D

NCT01312441
View directory record Official record
Conditions
Vitamin D Deficiency, Renal Failure Chronic Requiring Hemodialysis
Interventions
Ergocalciferol, Placebo
Drug
Lead sponsor
Albany College of Pharmacy and Health Sciences
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
4
States / cities
Albany, New York • Clifton Park, New York • Saratoga Springs, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2016 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Phase 2 Interventional

Improving The Nutritional Status Of The Malnourished Chronic Hemodialysis Patients In The State Of Tennessee

NCT00179153
View directory record Official record
Conditions
End Stage Renal Disease
Interventions
Nepro nutritional supplement
Dietary Supplement
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
352 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 28, 2014 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Phase 2 Interventional

Vitamin D3 Supplementation for Heart Failure Patients

NCT01636570
View directory record Official record
Conditions
Heart Failure, Vitamin D Deficiency, Cardiomyopathy, Congestive Heart Failure
Interventions
Placebo Comparator: Sugar Pill, Vitamin D3 (cholecalciferol)
Drug
Lead sponsor
Heidi Moretti, MS, RD
Other
Eligibility
Not listed
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
2
States / cities
Missoula, Montana
Source: ClinicalTrials.gov public record
Updated Apr 25, 2017 · Synced Jul 21, 2026, 5:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study to Assess the Use of a Simple Lab Test to Screen for Rickets in Children

NCT00502866
View directory record Official record
Conditions
Rickets
Interventions
Not listed
Lead sponsor
Agency for Healthcare Research and Quality (AHRQ)
Federal
Eligibility
6 Months to 15 Months
Enrollment
246 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 7, 2014 · Synced Jul 21, 2026, 5:11 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Research Study of Nutritional Methods to Reduce Body Fat Percentages in Overweight and Obese Populations

NCT00487344
View directory record Official record
Conditions
Obesity
Interventions
Non-Personalized Meal Planning, Personalized Meal Planning and Dietetic Consultation
Procedure
Lead sponsor
Central FITT, Inc
Other
Eligibility
25 Years to 45 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Edmond, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jul 2, 2007 · Synced Jul 21, 2026, 5:11 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Addressing Food Insecurity: Plant-Based Food Prescription Program

NCT06614920
View directory record Official record
Conditions
Health Literacy, Nutrition, Healthy, Nutrition Poor, Food Insecurity, Food Insecurity Among Children, Low Income Population
Interventions
Plant-Based Food Provision (with or without food prescription), Plant-Based Nutrition Education
Other
Lead sponsor
University of Miami
Other
Eligibility
Up to 99 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Not applicable Interventional

Chompions! A Treatment Study for Childhood Avoidant/Restrictive Food Intake Disorder (ARFID)

NCT05105308
View directory record Official record
Conditions
ARFID, Picky Eating, Eating Disorders in Children
Interventions
Family Assisted Diet (FAD), Feeling and Body Investigator_ARFID Division (FBI-ARFID)
Behavioral
Lead sponsor
Duke University
Other
Eligibility
60 Months to 119 Months
Enrollment
203 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Improving the Understanding of the Response to Vitamin D Supplementation

NCT01465178
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
cholecalciferol, Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
50 Years to 100 Years · Female only
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 24, 2016 · Synced Jul 21, 2026, 5:11 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Calcimimetics in Hypophosphatemic Rickets

NCT00844740
View directory record Official record
Conditions
Familial Hypophosphatemic Rickets
Interventions
Cinacalcet
Drug
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
5 Years to 21 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 16, 2020 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Prevention of Vitamin D Deficiency

NCT00494104
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D drops, 200 or 400 or 600 IU/day or 800 IU/day
Dietary Supplement
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
3 Weeks to 5 Weeks
Enrollment
398 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
Coralville, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 17, 2012 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Calcium-fortified Cereal Bars on Dietary Calcium Intake in Women

NCT01508689
View directory record Official record
Conditions
Calcium Deficiency
Interventions
Receive Kellogg's Nutri-Grain® cereal bars first, Receive Kellogg's Nutri-Grain® cereal bars second
Behavioral
Lead sponsor
Texas Woman's University
Other
Eligibility
18 Years and older · Female only
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 18, 2015 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Long-term Use of Proton Pump Inhibitors May Cause Vitamin B12 Deficiency in the Institutionalized Elderly

NCT00843453
View directory record Official record
Conditions
Vitamin B12 Deficiency
Interventions
blood collection, treatment (cyanocobalamin nasal spray)
Other · Drug
Lead sponsor
University of Delaware
Other
Eligibility
60 Years to 89 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
2
States / cities
Manchester, Maryland • Timonium, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 22, 2009 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Phase 4 Interventional

Vitamin D Deficiency in Chronic Kidney Disease (CKD) Patients

NCT00958451
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions
Paricalcitol, Ergocalciferol
Drug
Lead sponsor
Salem Veterans Affairs Medical Center
Federal
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Salem, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 23, 2011 · Synced Jul 21, 2026, 5:11 AM EDT
Terminated Not applicable Interventional Results available

Intensive Nutrition in Acute Respiratory Distress Syndrome (ARDS): A Clinical Trial (INTACT)

NCT01921101
View directory record Official record
Conditions
Acute Lung Injury
Interventions
intensive medical nutrition, control
Behavioral · Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 90 Years
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 5, 2014 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Sunweavers: Supporting Native American Women's Vitamin D Research

NCT01490333
View directory record Official record
Conditions
Vitamin D Deficiency, Cardiovascular Diseases
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
55 Years to 75 Years · Female only
Enrollment
99 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
3
States / cities
Bowler, Wisconsin • Lac du Flambeau, Wisconsin • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 19, 2014 · Synced Jul 21, 2026, 5:11 AM EDT
Completed No phase listed Observational

FGF23 and Angiotensin-(1-7) in Hypophosphatemia (GAP)

NCT03489993
View directory record Official record
Conditions
Hypophosphatemia, X-linked Hypophosphatemia, Renin-angiotensin System, Left Ventricular Hypertrophy
Interventions
Ang II and Ang-(1-7), FGF23 and klotho
Diagnostic Test
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
2 Years to 24 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 4, 2022 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Phase 3 Interventional Results available

Vitamin D to Improve Outcomes by Leveraging Early Treatment

NCT03096314
View directory record Official record
Conditions
Acute Respiratory Distress Syndrome, Vitamin D Deficiency, Critical Illness
Interventions
Vitamin D3, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
1,358 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
47
States / cities
Fresno, California • Los Angeles, California • Sacramento, California + 34 more
Source: ClinicalTrials.gov public record
Updated Jan 26, 2020 · Synced Jul 21, 2026, 5:11 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 21, 2026, 5:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Using Iodized Salt to Improve Serum Folate, B12 and Iron Levels

NCT06904612
View directory record Official record
Conditions
Neural Tube Defects, Folic Acid Deficiency, Spina Bifida, Anencephaly-Spina Bifida, B12 Deficiency Vitamin, Anemia, Iron Deficiency Anaemia Due to Dietary Causes
Interventions
Micronutrient fortified iodized salt
Dietary Supplement
Lead sponsor
Hydrocephalus and Neuroscience Institute
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Jul 13, 2025 · Synced Jul 21, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Supplementation in Overweight/Obese African American Adults and Youth (D-SUNNY)

NCT01583621
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Feb 8, 2017 · Synced Jul 21, 2026, 5:11 AM EDT