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
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
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
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
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
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
Vitamin D, Supplementation
Vitamin D Intervention in Infants - Pilot
The aims of the present study are to evaluate the concentrations of vitamin D in the plasma and of calcium in the plasma and in the urine as well as to evaluate bone mineral density using peripheral quantitative computed…
- Trial name
- VIDI-P (NCT01275885)
- Testing
- cholecalciferol (D3)
- Where
- Finland
- Volunteers
- 113 people, healthy volunteers welcome
- Sponsor
- Helsinki University Central Hospital
Vitamin D Deficiency
Effect of Vitamin D Supplementation on Health of Low Birth Weight Infants
The purpose of this study is to determine whether a weekly supplement of vitamin D to low birth weight term infants will reduce their mortality and hospital admissions and improve their immunity.
- Trial name
- DIVIDS (NCT00415402)
- Testing
- Vitamin D3
- Where
- India
- Volunteers
- 2,000 people, healthy volunteers welcome
- Sponsor
- Delhi University
Upper Respiratory Tract Infections, Lower Respiratory Tract Infections
Maternal Vitamin D for Acute Respiratory Infections in Infancy
There is a growing body of data suggesting that vitamin D modulates the host's immune response to acute respiratory infection (ARI).
- Trial name
- MDARI (NCT02388516)
- Testing
- Vitamin D3
- Where
- Bangladesh
- Volunteers
- 1,214 people, healthy volunteers welcome
- Sponsor
- The Hospital for Sick Children
Hypovitaminosis, Vitamin A Deficiency
Impact of Maternal Supplementation With Dual Megadose of Vitamin A
The purpose of this study is to evaluate the effect of maternal supplementation with 400,000 IU of oral retinol palmitate in the post-partum, the nutritional situation of the binomial mother-child, on growth and morbidity of…
- Trial name
- NCT00742937
- Testing
- vitamin A
- Where
- Brazil
- Volunteers
- 239 people, healthy volunteers welcome
- Sponsor
- Instituto Materno Infantil Prof. Fernando Figueira
Vitamin A Deficiency
Effect of Vitamin A Supplementation on Immune Responses in Human Neonates
Vitamin A supplementation (VAS) significantly reduces all-cause mortality when given after 6 months of age, but has a null or detrimental effect when given between 1-5 months.
- Trial name
- NNVAS (NCT01476358)
- Testing
- Vitamin A (retinyl palmitate).
- Where
- The Gambia
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- London School of Hygiene and Tropical Medicine
Asthma, Vitamin D Deficiency
Rapid vs Maintenance Vitamin D Supplementation in Deficient Children With Asthma to Prevent Exacerbations.
The role of vitamin D in respiratory health remains uncertain. Whether vitamin D reduces clinically important exacerbations of childhood asthma remains uncertain.
- Trial name
- NCT01395589
- Testing
- Vitamin D
- Where
- Qatar
- Volunteers
- 597 people, healthy volunteers welcome
- Sponsor
- Hamad Medical Corporation
Pneumonia, Vitamin D Deficiency
Kabul Vitamin D Supplementation Trial
Background: Pneumonia is the leading cause of childhood mortality, accounting for 19% of the 10.6 million deaths that occur each year1.
- Trial name
- NCT00548379
- Testing
- vitamin D
- Where
- 2 sites in Afghanistan
- Volunteers
- 3,048 people, healthy volunteers welcome
- Sponsor
- London School of Hygiene and Tropical Medicine
Mitochondrial Myopathies
Niacin Supplementation in Healthy Controls and Mitochondrial Myopathy Patients
The most frequent form of adult-onset mitochondrial disorders is mitochondrial myopathy, often manifesting with progressive external ophthalmoplegia (PEO), progressive muscle weakness and exercise intolerance.
- Trial name
- NiaMIT (NCT03973203)
- Testing
- Niacin
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- University of Helsinki
Malnutrition
Effect of Vitamins on Academic Performance of School Children
The purpose of this clinical trial is to determine if administration of a daily chewable multivitamin-mineral supplement (Monday - Friday when school is in session) given to children (third through sixth graders) during the…
- Trial name
- NCT00418990
- Testing
- Multivitamin/Mineral supplements
- Where
- United States
- Volunteers
- 1,600 people, healthy volunteers welcome
- Sponsor
- University of Medicine and Dentistry of New Jersey
Nutrition Status, Bone Health
Evaluation of Calcium and Vitamin D Supplementation During Marine Corps Training
The primary objective of this randomized, double-blind, placebo-controlled trial is to determine the efficacy and effectiveness of Ca and vitamin D supplementation provided daily throughout Marine Corps recruit training on…
- Trial name
- MCRD-PI (NCT02636348)
- Testing
- Calcium/Vitamin D
- Where
- United States
- Volunteers
- 380 people, healthy volunteers welcome
- Sponsor
- United States Army Research Institute of Environmental Medicine
Vitamin D2 Supplementation in Vitamin D Insufficiency
Optimal Doses of Ergocalciferol Supplementation for Treatment of Hypovitaminosis D in Adults
To investigate the optimal initial and maintenance doses of vitamin D2 supplementation for the treatment of vitamin D insufficiency in Thai adults, and to determine the prevalence of and risk factors for hypovitaminosis D among…
- Trial name
- NCT03228862
- Testing
- Ergocalciferol
- Where
- Thailand
- Volunteers
- 360 people, healthy volunteers welcome
- Sponsor
- Chulalongkorn University