Clinical trials: Deficiency Vitamins
Chronic Kidney Disease, Vitamin D Deficiency
Vitamin D, Chronic Kidney Disease (CKD) and the Microcirculation
Overall research aims: This study will examine the effect of vitamin D supplementation on the function of the endothelium and microcirculation of patients with chronic kidney disease and vitamin D deficiency.
- Trial name
- NCT00882401
- Testing
- Ergocalciferol (Vitamin D)
- Where
- United Kingdom
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Barts & The London NHS Trust
Precursor Cell Lymphoblastic Leukemia-Lymphoma, Vitamin D Deficiency
Nutrition and Body Composition in Acute Lymphoblastic Leukemia
Many adolescents with acute lymphoblastic leukemia (ALL) have been found to have low bone density by the end of treatment. This can lead to long-term suffering in survivors due to poor bone health.
- Trial name
- NCT01317940
- Testing
- Vitamin D and Calcium Citrate
- Where
- United States
- Volunteers
- 76 people, healthy volunteers welcome
- Sponsor
- Children's Hospital Los Angeles
Vitamin D Deficiency, Sarcopenia
Vitamin D Deficiency and Body Composition in the Patients With Hemophilia
Hemophilia is associated with osteoporosis and increased prevalence of low bone mineral density (BMD). Many clinical risk factors have been reported, such as hemophilic arthropathy, reduced physical activity, decreased sun…
- Conditions
- Vitamin D Deficiency, Sarcopenia, Osteoporosis, Body Composition
- Trial name
- NCT05517070
- Where
- Taiwan
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Tsung-Ying Li
Vitamin B6 Deficiency
Vitamin B6 Effects for Women Taking Birth Control Pills
Chronically inadequate B6 nutritional status is associated with aberrant one-carbon (1C) metabolism and health. Plasma pyridoxal phosphate (PLP) >30 nmol/L often has been considered to be the cutoff indicative of nutritional…
- Trial name
- NCT01128244
- Testing
- Vitamin B6, Infusion of labeled serine, methionine and leucine
- Where
- United States
- Volunteers
- 13 people, healthy volunteers welcome
- Sponsor
- University of Florida
Vitamin B-12 Deficiency, Achlorhydria
Cobalamin Absorption From Fortified Food
To determine B12 bioavailability from 14C-B12 fortified bread in healthy subjects and in subjects with proton pump inhibitor induced achlorhydria.
- Trial name
- FL-72 (NCT01399164)
- Testing
- 14C-B12 fortified bread
- Where
- United States
- Volunteers
- 6 people, healthy volunteers welcome
- Sponsor
- USDA, Western Human Nutrition Research Center
Vitamin D Deficiency, Leiomyoma
Correlation Between Serum Vitamin D3 and Incidence of Uterine Leiomyoma
The aim of the current study is to evaluate the association between low serum vitamin D level and incidence of uterine leiomyoma in Egyptian women as the research hypothesis that low serum vitamin D is considered a risk factor…
- Trial name
- NCT05151393
- Testing
- Measuring vitamin D3 level
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Ain Shams University
Deficiency of Vitamin D Blood Test
Development of Non-invasive Method for Quantifying Vitamin D Levels in the Body Using Spectroscopy
Lack in vitamin D reduces the absorption of calcium in the body; accelerates bone loss tnd may increase the risk of fractures due to osteoporosis.
- Trial name
- NCT01912898
- Testing
- No intervention,The group with vitamin D deficient will be treated by the Endocrinology Department by loading of vitamin D
- Where
- Israel
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Hillel Yaffe Medical Center
Chronic Kidney Diseases
SOP's for CKD-MBD-Biomarkers
CKD-MBD (Chronic Kidney Disease - Mineral and Bone Disorder) is an extensive disease and includes dysfunction of the mineral metabolism, the bone metabolism and cardiovascular diseases in the context of renal insufficiency.
- Trial name
- NCT02708368
- Testing
- blood withdrawal
- Where
- 2 sites in Germany
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- RWTH Aachen University
Polycystic Ovary Syndrome, Healthy
Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism
Background: Polycystic ovary syndrome (PCOS) is as common as 5-10% of all women in Austria. PCOS women frequently present with metabolic disturbances, hyperandrogenism and infertility. New therapy concepts are warranted.
- Conditions
- Polycystic Ovary Syndrome, Healthy, Vitamin D Deficiency
- Trial name
- NCT01721915
- Testing
- Vitamin D supplementation
- Where
- Austria
- Volunteers
- 330 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Visual Snow Syndrome, Migraine
Investigating Brain Function in People With and Without Visual Snow Syndrome Using Adaptation to Visual Stimuli
The goal of this study is to learn more about the brain pathways and activity involved in creating Visual Snow Syndrome (VSS). The main questions it aims to answer are: Does VSS arise from spontaneous activity in brain pathways?…
- Conditions
- Visual Snow Syndrome, Migraine, Healthy
- Trial name
- VPVSS (NCT06961864)
- Testing
- Visual Adaptation, Assessments and Questionnaires, Functional Magnetic Resonance Imaging (fMRI)
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University of Minnesota
Nutrient Deficiency
Impact of Fortified Rice on Workers' Nutrition Status
The study is a single center, open label, nutrition intervention study. Healthy adult male working at a Singapore construction site are included if they fulfill inclusion and exclusion criteria.
- Trial name
- NCT04343508
- Testing
- Fortified rice
- Where
- Singapore
- Volunteers
- 133 people, healthy volunteers welcome
- Sponsor
- dsm-firmenich Switzerland AG
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
Neurosonographic Findings of Vitamin D Deficiency
Neurosonographic Findings in Pregnant Women With Vitamin D Deficiency
In the study, the potential effects of vitamin D deficiency on fetal neurodevelopmental parameters will be examined. In this context, fetal brain development will be compared between pregnant women with and without vitamin D…
- Trial name
- NCT06903247
- Testing
- Neurosonographic Findings of Vitamin D Deficiency in Single Healthy Pregnancies Presenting for Routine Antenatal Care Between 20-30 Weeks of Gestation.
- Where
- Turkey (Türkiye)
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Sanliurfa Education and Research Hospital
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
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
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
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
Vitamin D Deficiency, Military Activity
Vitamin D Supplementation in Conscripts
A longitudinal, triple-blinded, randomized, placebo-controlled trial, with a 7-month follow-up period is conducted between October 2016 to April 2017.
- Trial name
- NCT04359524
- Testing
- Vitamin D3 (1200 IU/30µg)
- Where
- Estonia
- Volunteers
- 63 people, healthy volunteers welcome
- Sponsor
- Leho Rips
Healthy Subjects, Vitamin D Deficiency
hCAP18 Levels and Vitamin D Deficiency in Healthy Subjects
Vitamin D deficiency (low levels of vitamin D in the blood) is a common problem. A recently discovered protein, called hCAP18, likely plays an important role in the immune system and may depend on adequate levels of vitamin D.
- Trial name
- NCT00742235
- Testing
- ergocalciferol
- Where
- United States
- Volunteers
- 99 people, healthy volunteers welcome
- Sponsor
- Massachusetts General Hospital
Vitamin D Deficiency, Recurrent Spontaneous Abortion
Study on Clinical Value of Vitamin D in Recurrent Spontaneous Abortion
The observational study is to compare vitamin D deficiency and related indicators among different spontaneous abortions in describe female reproductive health.The main question aim to answer is: the possible pathogenesis of…
- Trial name
- NCT06002035
- Testing
- Binom Vitamin D drops
- Where
- China
- Volunteers
- 1,421 people, healthy volunteers welcome
- Sponsor
- Jianmei Xia