Clinical trials: Vitamin Deficiencies
Folate Deficiency, Iodine Deficiency
Acceptability and Nutritional Impact of Double-fortified Salt Containing Iodine and Folic Acid - Phase 1
The overarching objective of this two-phase project is to assess the effects of fortifying iodized salt with folic acid on improving women's folate status and thereby reduce the risk of neural tube defects (NTDs), which are…
- Conditions
- Folate Deficiency, Iodine Deficiency, Anemia, Macrocytic, Anemia Deficiency
- Trial name
- DFS-IoFA-1 (NCT05792241)
- Where
- Ethiopia
- Volunteers
- 100 people
- Sponsor
- University of California, Davis
Bacterial Pneumonia
Vitamin D Supplementation Prevents Elderly Pneumonia
Pneumonia is the fourth leading cause of death and frequently occurs in institutionalized elderly people in Japan. Recently, several clinical and experimental studies have reported the importance of vitamin D in the regulation of…
- Trial name
- NCT00877422
- Testing
- Vitamin D3
- Where
- Japan
- Volunteers
- 100 people
- Sponsor
- Tohoku University
Deficiencies Micronutrient, Nutrition Disorders
Effect of Consuming Vitamin A-fortified Sugar on Serum Retinol Levels in Children
The increase in vitamin A deficiency (<20 mcg/dL) among children under five in Colombia (2010-2015) is a public health problem (27.3%).
- Trial name
- NCT07860060
- Testing
- white sugar fortified with retinol, refined white sugar for culinary use
- Where
- Colombia
- Volunteers
- 76 people, healthy volunteers welcome
- Sponsor
- Universidad del Valle, Colombia
Vitamin B 12 Deficiency
Cobalamin Status in Young Children With Gastrointestinal Symptoms or Feeding Problems
During fetal life and infancy, an adequate cobalamin status is important for normal growth and central nervous system development.
- Trial name
- NCT00710359
- Testing
- Hydroxycobalamin (Vitamin B12 Depot, Nycomed Pharma)
- Where
- Norway
- Volunteers
- 100 people
- Sponsor
- Haukeland University Hospital
Vitamin D Deficiency, End Stage Renal Disease
A Study of 25-hydroxy Vitamin d Levels in Non-itching Hemodialysis Patients
Hypothesis: 25-hydroxy vitamin D levels in non-itching hemodialysis (HD) patients will be higher than those in HD patients with itching 25-hydroxy vitamin D levels will be measured in non-itching hemodialysis patients and…
- Trial name
- NCT01548716
- Where
- 2 sites in United States
- Volunteers
- 50 people
- Sponsor
- Winthrop University Hospital
Hypercholesterolemia, Hyperlipidemia
PROSPective Evaluation of Fortified Eggs Related to Improvement in The Biomarker Profile for Your Health
The objective of the study is to assess the effect of fortified eggs (compared to a non-egg supplemented diet) and intermittent fasting (IF) (compared to a usual care diet) on biomarker profile at 4 months.
- Conditions
- Hypercholesterolemia, Hyperlipidemia, Vitamin Deficiency, Obesity
- Trial name
- PROSPERITY (NCT04673721)
- Testing
- Fortified eggs, Intermittent fasting, Non-egg supplemented
- Where
- United States
- Volunteers
- 140 people
- Sponsor
- Duke University
Type 2 Diabetes Mellitus (T2DM), Vitamin D Deficiency
Effect of Vitamin D Supplementation on Metabolic Parameters in Patients With Type 2 Diabetes and Vitamin D Deficiency
The goal of this clinical study is to learn whether vitamin D supplementation improves metabolic control in adults with type 2 diabetes mellitus who have vitamin D deficiency.
- Trial name
- VITD-DM2 (NCT07468721)
- Testing
- cholecalciferol (vitamin D3)
- Where
- Paraguay
- Volunteers
- 119 people
- Sponsor
- Faculty of Medical Sciences, Clinical Hospital
Locally Advanced Cervical Cancer, Vitamin D Concentration
Vitamin D Status and Clinical Outcomes in Locally Advanced Cervical Cancer
Background. Definitive chemoradiotherapy represents the standard therapeutic approach for the management of locally advanced cervical cancer.
- Trial name
- CERVITAL (NCT07743918)
- Testing
- Pretreatment Vitamin D Assessment in Serum and Cervical Lavage Fluid
- Where
- Serbia
- Volunteers
- 100 people
- Sponsor
- University of Kragujevac
Vitamin A Deficiency
Vitamin A Bioavailability in Lactating Women With Marginal Vitamin A Status
The study will assess the relative bioavailability and bioefficacy of cryptoxanthin (CX) and beta-carotene (BC) from food sources for increasing breast milk carotenoid and retinol concentrations in lactating Bangladeshi women.
- Trial name
- NCT01420406
- Testing
- 0 mg retinol activity equivalents, 12 mg of BC, 6 mg of CX
- Where
- Bangladesh
- Volunteers
- 140 people, healthy volunteers welcome
- Sponsor
- USDA, Western Human Nutrition Research Center
Calcium and Vitamin D Deficiencies
Calcichew D3 Preference Study in Participants Eligible for Calcium and Vitamin D Supplementation.
The purpose of this study is to compare the preference of Calcichew D3 500/400 (containing 500 mg calcium and 400 IU of vitamin D) with Adcal-D3 600/400 (containing 600 mg of calcium and 400 IU of vitamin D) in Test Group 1, and…
- Trial name
- NCT02457247
- Testing
- Calcichew D3, Adcal-D3, Kalcipos-D
- Where
- 9 sites in Germany, United Kingdom
- Volunteers
- 276 people
- Sponsor
- Takeda
Vitamin D Deficiency, Vascular Calcification
Effects of Cholecalciferol on Osteoprotegerin Levels in Patients on Peritoneal Dialysis
Aim: To investigate whether cholecalciferol (4800 U/daily) or placebo for 16 weeks reduces proteins levels associated with vascular calcification (osteoprotegerin, osteopontin, osteocalcin) in patients treated with peritoneal…
- Conditions
- Vitamin D Deficiency, Vascular Calcification, Renal Insufficiency, End Stage Renal Failure on Dialysis
- Trial name
- NCT02598635
- Testing
- Cholecalciferol
- Where
- Mexico
- Volunteers
- 58 people
- Sponsor
- Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran
Bariatric Surgery, Micronutrient Deficiencies
Supplementation After Bariatric Surgery
The aim of this study is to assess medication adherence to vitamin and mineral supplements after bariatric surgery and identify factors that may influence adherence.
- Conditions
- Bariatric Surgery, Micronutrient Deficiencies, Obesity
- Trial name
- NCT04412421
- Testing
- Gastric Bypass, Sleeve Gastrectomy
- Where
- Sweden
- Volunteers
- 260 people
- Sponsor
- Region Östergötland
Vitamin D Deficiency
Comparing Different Amounts of Vitamin D Supplementation to Preschool Children Living in Northern and Southern Sweden
Vitamin D has a range of biological effects of public health relevance. Vitamin D status is assessed on levels of its metabolite 25-hydroxyvitamin D [25(OH)D], where levels < 50 nmol/L indicate insufficiency.
- Trial name
- Dvisum (NCT01741324)
- Testing
- Vitamin D 25 microg/d, Vitamin D 10 microg/d, No extra vitamin D
- Where
- 2 sites in Sweden
- Volunteers
- 220 people, healthy volunteers welcome
- Sponsor
- Umeå University
Vitamin B 12 Deficiency
Early Infant Micronutrition and Development
Globally, vitamin B12 deficiency is one of the most common micronutrient deficiencies. Poor status is also seen in affluent countries such as in Norway.
- Trial name
- RART (NCT05005897)
- Testing
- Cyanocobalamin
- Where
- Norway
- Volunteers
- 600 people
- Sponsor
- Sykehuset Innlandet HF
Osteomalacia, Neoplasms
Catheterization to Locate Mesenchymal Tumors in Patients With Tumor-Induced Osteomalacia or Oncogenic Osteomalacia
This study will use a procedure called selective venous catheterization in patients with tumor-induced osteomalacia (TIO) or oncogenic osteomalacia (OOM) to try to locate very small tumors that produce proteins called…
- Trial name
- NCT00099762
- Where
- United States
- Volunteers
- 45 people
- Sponsor
- National Institute of Dental and Craniofacial Research (NIDCR)
Deficiency, Vitamin D, Insulin Resistance
Vitamin D Supplementation and and Glycemic Indexes
Age affect insulin sensitivity and the metabolism, and vitamin D status was shown to have a correlation with markers of insulin resistance.
- Trial name
- NCT03478475
- Testing
- cholecalciferol (Euro-Pharm International, Canada)
- Volunteers
- 115 people, healthy volunteers welcome
- Sponsor
- Université d'Auvergne
Obesity
Assessment of Nutritional Consequences of Sleeve Gastrectomy
Bariatric surgery is now recognized as a procedure of choice for the treatment of morbid obesity, resulting in long-term effectiveness on weight loss and comorbidities.
- Trial name
- ERNEST (NCT01475903)
- Testing
- Longitudinal sleeve gastrectomy
- Where
- France
- Volunteers
- 60 people
- Sponsor
- University Hospital, Clermont-Ferrand
Vitamin D Deficiency, Dental Implant Failure Nos
Vitamin D and Serum Calcium Level Insufficiency and Early Dental Implant Failure
In this study there is a trial to investigate whether there is a correlation between early implant failure and low serum levels of vitamin D.
- Trial name
- NCT04906161
- Testing
- Vitamin D and calcium levels
- Where
- 2 sites in Egypt
- Volunteers
- 30 people
- Sponsor
- Ain Shams University
Heart Failure, Vitamin D Deficiency
Vitamin D Supplementation in Chronic Stable Heart Failure
In cross-sectional and prospective cohort studies, vitamin D deficiency is associated with increased mortality, cardiovascular events including sudden cardiac death and stroke, diabetes, hypertension and impaired function of the…
- Trial name
- VITD-HI (NCT01292720)
- Testing
- Cholecalciferol
- Where
- Austria
- Volunteers
- 29 people
- Sponsor
- Medical University of Graz
Anemia, Iron Deficiency, Vitamin A Deficiency
Iron and Vitamin A in School Children
The WHO recommended intermittent iron supplementation as a strategy for prevention of anemia and iron deficiency among school age children.
- Conditions
- Anemia, Iron Deficiency, Vitamin A Deficiency, Cognitive Development, Helminthic Infection
- Trial name
- IronVitA (NCT04137354)
- Testing
- Intermittent iron supplement, High-dose Vitamin A supplement
- Where
- Ethiopia
- Volunteers
- 504 people, healthy volunteers welcome
- Sponsor
- University Ghent
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