Clinical trials: Vitamin Supplementation
Hypervitaminosis A
Total Body Vitamin A Before and After Vitamin A Supplementation in a Community Where Liver is Frequently Eaten
This study will assess total body vitamin A pool size, as well as liver vitamin A stores, by means of stable isotope dilution in preschool children from a South African community where liver, an exceptionally rich source of…
- Trial name
- NCT02915731
- Testing
- Vitamin A supplement
- Where
- South Africa
- Volunteers
- 95 people, healthy volunteers welcome
- Sponsor
- Medical Research Council, South Africa
Primary Hyperparathyroidism
Vitamin D Supplementation After Parathyroid Surgery
A randomised double blind clinical trial, accepted by the Medical Products Agency and registered in the European Clinical Trials Database.
- Trial name
- NCT00982722
- Testing
- cholecalciferol and calcium carbonate, calcium carbonate
- Where
- 2 sites in Sweden
- Volunteers
- 150 people
- Sponsor
- Karolinska University Hospital
Insulin Resistance
Effect of Vitamin D Supplementation on Oral Glucose Tolerance Among Obese Adolescents
Childhood obesity is a rapidly growing epidemic in the US and the world. Current estimates suggest that 30% of our nation's children are either overweight ot obese.
- Trial name
- NCT01856946
- Testing
- 4,000 IU vitamin D3
- Where
- United States
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- University of Missouri-Columbia
Type 1 Diabetes
Effect of Vitamin D on the Honeymoon Period in Children and Adolescents With Type 1 Diabetes
The purpose of this study is to determine if supplementation with Vitamin D in children and adolescents with newly diagnosed type 1 diabetes increases the number of patients who enter the honeymoon period.
- Trial name
- NCT01724190
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 38 people
- Sponsor
- Nationwide Children's Hospital
Acute Bronchitis, Upper Respiratory Tract Infection
Effect of Supplementation With Vitamin D on the Acute Bronchitis Prevention During the First Year of Life
A phase III multicenter randomized double blind clinical trial will be conducted. After obtaining written consent the infant will be randomized, during the first two weeks of life, to a study group to receive either 400 IU or…
- Conditions
- Acute Bronchitis, Upper Respiratory Tract Infection, Acute Bronchiolitis
- Trial name
- VitDBR2012 (NCT01875757)
- Testing
- Vitamin D3
- Where
- Spain
- Volunteers
- 200 people
- Sponsor
- Hospital Universitari Vall d'Hebron Research Institute
Vitamin D Deficiency, Preterm Infants
Multi-dose Vitamin D Supplementation in Preterm Infants
Preterm newborns are born with lower vitamin D stores. Although vitamin D supplementation is recommended there is no consensus regarding the adequate dose of supplementation for preterm infants.
- Trial name
- NCT02941185
- Testing
- Devit-3 Oral Drop
- Where
- Turkey (Türkiye)
- Volunteers
- 121 people
- Sponsor
- Zekai Tahir Burak Women's Health Research and Education Hospital
Vitamin D Deficiency, Stress Fracture
Vitamin D3 Supplementation and Stress Fracture Occurrence in High-Risk Collegiate Athletes
The main objective of this study is to find a correlation between vitamin D deficiency and stress fracture occurrences in athletes who participate in high-risk activities.
- Conditions
- Vitamin D Deficiency, Stress Fracture, Athletic Injuries, Orthopedic Disorder
- Trial name
- NCT03395171
- Testing
- Cholecalciferol (Vitamin D3)
- Volunteers
- 118 people, healthy volunteers welcome
- Sponsor
- Prisma Health-Midlands
Vitamin D Deficiency
Effects of Vitamin D Supplementation on Immune Function in Infants
Current study shows that vitamin D deficiency might affect human's immune function. Although breast milk is the best food of infants, however the vitamin D content in breast milk is low.
- Trial name
- NCT04461665
- Testing
- vitamin D
- Where
- Taiwan
- Volunteers
- 59 people, healthy volunteers welcome
- Sponsor
- Shih Chien University
Vitamin D Deficiency, Rickets
Vitamin D Supplementation in Breastfeeding Women
Adequate vitamin D is essential for proper infant growth and development. However, human milk is low in vitamin D, and most infants do not receive recommended supplementation.
- Conditions
- Vitamin D Deficiency, Rickets, Infant Nutrition Disorders
- Trial name
- NCT01240265
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
Irritable Bowel Syndrome (IBS), Vitamin D Deficiency
Role of Vitamin D Supplementation in Children With Irritable Bowel Syndrome
This study was designed to determine whether vitamin D supplementation improved symptoms in children with irritable bowel syndrome, a condition associated with repeated abdominal pain and changes in bowel habits.
- Trial name
- NCT07914478
- Testing
- Vitamin D3
- Where
- Pakistan
- Volunteers
- 48 people
- Sponsor
- Aziz Bhatti Shaheed Teaching Hospital
Mortality, Morbidity
Impact of the WHO Recommended Vitamin A Supplementation at Immunisation Contacts
High-dose vitamin A to children above 6 months of age reduces all-cause mortality by 23-30%. The WHO recommends vitamin A supplementation (VAS) with the first vaccine after 6 months of age.
- Trial name
- NCT00514891
- Testing
- Vitamin A
- Where
- Guinea-Bissau
- Volunteers
- 9,500 people, healthy volunteers welcome
- Sponsor
- Bandim Health Project
Stress Fracture, Injury
Vitamin D Supplementation in the Armed Forces
The study will comprise of an original investigation that will take the form of a prospective intervention (two matched groups) study.
- Trial name
- D_SAF (NCT03963128)
- Testing
- Supplementation Vitamin D3
- Where
- United Kingdom
- Volunteers
- 4,450 people, healthy volunteers welcome
- Sponsor
- University of Surrey
Coronary Artery Disease
The DANish COronary DEcalcification (DANCODE) Trial
1. Abstract Introduction Coronary artery calcification (CAC) and especially progression in CAC is a strong predictor of acute myocardial infarction and cardiovascular mortality.
- Trial name
- DANCODE (NCT05500443)
- Testing
- Vitamin K2 (Menaquinone-7)
- Where
- 3 sites in Denmark
- Volunteers
- 400 people
- Sponsor
- Odense University Hospital
Vitamin D3, Chronic-granulomatous Disease
Vitamin D3 For CGD Patients With BCGosis/Itis
When children with chronic granulomatous disease (CGD) got BCG infection the treatment would be a tough task. The goal of the proposed research is to observe weather vitamin D supplementation can help the CGD children get through…
- Conditions
- Vitamin D3, Chronic-granulomatous Disease, BCG
- Trial name
- NCT03984890
- Testing
- Vitamin D3, Traditional treatment of CGD and TB
- Where
- 2 sites in China
- Volunteers
- 50 people
- Sponsor
- Children's Hospital of Fudan University
Village Children
Deworming and Enhanced Vitamin A Every 6 Month in Rural Indian Children Aged 1-6
Randomisation of 72 large rural areas ("blocks") into a 2 x 2 trial of six- monthly treatment of all village children aged 1-5 with albendazole(400mg), vitamin A (200000 iu), both or neither.
- Trial name
- NCT00222547
- Testing
- Vitamin A, Albendazole
- Where
- India
- Volunteers
- 720,000 people, healthy volunteers welcome
- Sponsor
- University of Oxford
Atopic Dermatitis
PRAgmatic Trial in Atopic Dermatitis Testing Long-term Control Effectiveness of New Phototherapy Regimen During Winter Coupled With Oral Vitamin D Supplementation vs. Placebo
Spaced phototherapy sessions during winter as add-on therapy in combination with vitamin D supplementation or not, could be beneficial to improve disease LTC in AD patients
- Trial name
- PRADA (NCT02537509)
- Testing
- Cholecalciferol
- Where
- 11 sites in France
- Volunteers
- 111 people
- Sponsor
- Rennes University Hospital
Vitamin D Deficiency, Pre Eclampsia
Evaluation of the Effectiveness of Vitamin D Supplementation to Pregnant Women and Their Infants in Pakistan.
Vitamin D deficiency is wide spread in South Asian population and is contributing to burden of disease in this region including Pakistan.
- Conditions
- Vitamin D Deficiency, Pre Eclampsia, Stillbirths, Low Birth Weight
- Trial name
- NCT01229189
- Testing
- Vitamin D
- Where
- Pakistan
- Volunteers
- 460 people
- Sponsor
- Aga Khan University
Mortality, Morbidity
Sex-Differential Health Interventions In Low-Birth-Weight Infants
Our group has consistently found that the major interventions to reduce morbidity and mortality in low-income countries have sex-differential effects.
- Conditions
- Mortality, Morbidity, Growth, Neonatal Mortality
- Trial name
- NCT00625482
- Testing
- OPV, OPV plus BCG
- Where
- Guinea-Bissau
- Sponsor
- Bandim Health Project
Vitamin D Deficiency, Cystic Fibrosis
Efficacy of Intensive Cholecalciferol Monitoring and Supplementation on Serum vitD Levels in Pediatric Patients With CF
Cystic fibrosis (CF) is an autosomal recessive disease caused by alterations in the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene, characterized by multisystemic alterations, mainly in the lung, intestine…
- Conditions
- Vitamin D Deficiency, Cystic Fibrosis, Bone Density, Low, Inflammation Chronic
- Trial name
- NCT05276960
- Testing
- Cholecalciferol Pill
- Where
- Mexico
- Volunteers
- 40 people
- Sponsor
- Hospital Infantil de Mexico Federico Gomez
Vitamin D Deficiency
Personalized Vitamin D Supplementation in European and African Americans
The proposed study is a randomized, double-blind, controlled, multi-center clinical trial of six months of daily oral vitamin D3 (cholecalciferol).
- Trial name
- NCT02362269
- Testing
- Vitamin D
- Where
- 2 sites in United States
- Volunteers
- 169 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison