Clinical trials: Vitamin A Deficiency
Vitamin D Deficiency, Hypovitaminosis A
A Randomized Controlled Trial Testing The Effect Of A Multi-Nutrient Fortified Juice
The goal of this investigator-initiated study is to determine whether the fortification of orange juice with vitamin D, vitamin A, and vitamin E will enhance the vitamin D, vitamin A, and vitamin E status children ages 6-10 that…
- Conditions
- Vitamin D Deficiency, Hypovitaminosis A, Vitamin E Deficiency
- Trial name
- NCT01909063
- Testing
- Vitamin D, Vitamin D, Vitamin E, and Vitamin A, Control, 700 mg Calcium
- Where
- United States
- Volunteers
- 180 people, healthy volunteers welcome
- Sponsor
- Boston University
Respiratory Tract Infection, Vitamin D Deficiency
Cholecalciferol Intervention to Prevent Respiratory Infections Study
This is a feasibility double-blind randomised controlled trial in 32 participants. It evaluates the feasibility of a full trial which will examine the efficacy of weekly supplementation of cholecalciferol (vitamin D3) relative to…
- Trial name
- CIPRIS (NCT01549938)
- Testing
- Cholecalciferol
- Where
- Australia
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- Menzies Institute for Medical Research
Vitamin D Deficiency
Topical Delivery of Vitamin D3 as Vitamin D Supplementation
After obtaining the approval from the IRB of University of Dammam and informed consent from 550 healthy patients, with vitamin D deficiency and vitamin D insufficiency and deficiency were recruited.
- Trial name
- NCT02735200
- Testing
- Application of topical vitamin d3 (Top-D), Application of Aloe vera gel
- Where
- Saudi Arabia
- Volunteers
- 550 people, healthy volunteers welcome
- Sponsor
- Imam Abdulrahman Bin Faisal University
Vitamin D Deficiency
The 'Hidden' Biological Impact of Vitamin D Deficiency: a Biomarker Study; Part 2
The investigators major aims are to: determine the vitamin D status of a group of young, apparently healthy adults in Hong Kong; examine inter-relationships between vitamin D status and biomarkers of DNA damage and repair…
- Trial name
- NCT02451787
- Testing
- Vitamin D
- Where
- Hong Kong
- Volunteers
- 27 people, healthy volunteers welcome
- Sponsor
- The Hong Kong Polytechnic University
Vitamin A Deficiency
Efficacy of Biofortified Maize to Improve Maternal and Infant Vitamin A Status
The purpose of this randomized control trial is to test the impact of provitamin A carotenoid biofortified maize meal consumption on maternal and infant vitamin A status.
- Trial name
- NCT02804490
- Testing
- Conventional white maize, Provitamin A carotenoid biofortified maize, Preformed vitamin A fortified maize
- Where
- Zambia
- Volunteers
- 255 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins Bloomberg School of Public Health
Implant Stability With Vitamin D Deficiency
Stability of Dental Implants Placed in Patients With Vitamin D Deficiency Using Sequential Drilling Versus a New One Single Drilling Design
Vitamin D considers as the most potent effect on calcium level in blood it was found that vitamin D target mainly bone tissue intestine and kidney for calcium absorption In bone, vitamin D stimulates mainly the activity of…
- Trial name
- NCT03695562
- Testing
- sequential drilling technique
- Where
- Egypt
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Cairo University
Vitamin Deficiency
Study of Absorption Characteristics of Two Multivitamin Mineral Formulations (Gel vs. Tablet/Capsule)
This clinical study is designed to evaluate difference in the AUC of the absorption of Multivitamin and minerals defined in the protocol
- Trial name
- NCT03146273
- Testing
- Multivitamins
- Where
- Israel
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Galilee CBR
Iron-deficiency, Vitamin A Deficiency
Sub Regional Micronutrient Survey in Ethiopia
To conduct a sub-regional micronutrient survey (SRMNS) assessing the prevalence of vitamin A, Zn, and Fe status in the country
- Conditions
- Iron-deficiency, Vitamin A Deficiency, Zinc Deficiency
- Trial name
- NCT03353662
- Testing
- Women of Gamo Gofa, Children of Gamo Gofa, Women of West Gojjam
- Where
- 2 sites in Ethiopia, Switzerland
- Volunteers
- 1,200 people, healthy volunteers welcome
- Sponsor
- Swiss Federal Institute of Technology
Vitamin A Deficiency, Low Serum Retinol
Efficacy of β-carotene Biofortified Maize in Reducing Vitamin A Deficiency Among Children
The purpose of this cluster-randomized trial is to examine whether daily consumption of β-carotene biofortified maize flour can reduce the prevalence of vitamin A deficiency and improve the vitamin A status and among 4-8 year old…
- Trial name
- NCT01695148
- Testing
- β-Carotene Biofortified Maize Flour, White Maize Flour
- Where
- Zambia
- Volunteers
- 1,228 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins Bloomberg School of Public Health
Healthy, Vitamin D Deficiency
Can Correction of Low Vitamin D Status in Infancy Program for a Leaner Body Composition?
One in four infants are born with low amounts of vitamin D stored in their body. This study is designed to test whether improving vitamin D status quickly after birth helps infants to build muscle and to normalize growth.
- Conditions
- Healthy, Vitamin D Deficiency, Gestational Diabetes
- Trial name
- NCT02563015
- Testing
- cholecalciferol, Reference 400
- Where
- Canada
- Volunteers
- 139 people, healthy volunteers welcome
- Sponsor
- McGill University
Vitamin D Deficiency
Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children
The purpose of this study is to determine if the vitamin D binding protein genotype influences circulating vitamin D levels and if it may have functional consequences on vitamin D activity.
- Trial name
- VitaD (NCT01050387)
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 193 people, healthy volunteers welcome
- Sponsor
- Yale University
Nutritional Deficiency
The Use of the 25 (OH) D Saliva Test as a Substitute for the 25 (OH) D Serum Test in Healthy People
Routine examination of vitamin D levels is carried out by checking serum 25 (OH)D levels, which indicate circulating vitamin D levels.
- Trial name
- NCT04655664
- Testing
- not currently consumed vitamin D supplements regularly, consumed vitamin D supplements regularly
- Where
- Indonesia
- Volunteers
- 56 people, healthy volunteers welcome
- Sponsor
- Universitas Sumatera Utara
Deficiency, Vitamin D
Effect of Vitamin D Replacement on Bone Healing in Mini-dental Implants
1. Title 2. Executive team 3. Research line 4. Summary 5. Research problem 6. Justification 7. Literature review 8. Objectives 9. Materials and methods 10. Dissemination of knowledge generated 11. Schedule of activities 12.
- Trial name
- NCT03356730
- Testing
- Vitamin D
- Where
- Brazil
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Universidade de Passo Fundo
Insulin Sensitivity
Effect of Vitamin D Replacement on Insulin Sensitivity
Healthy subjects with low Vitamin D levels will be randomly assigned to either Vitamin D replacement or placebo for a period of 8 weeks.
- Trial name
- NCT01268111
- Testing
- Ergocalciferols
- Where
- United States
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Texas Tech University Health Sciences Center
Beta-carotene Bioavailability, Vitamin A Deficiency
Effect of SNPs in the BCMO1 Enzyme
Summary: Chronic intake of foods low in vitamin A (retinol) and provitamin A forming an unbalanced diet with little variety is common in young individuals in the United Kingdom (UK) population and can lead to subclinical…
- Trial name
- BETASNP2 (NCT02276014)
- Testing
- Beta-carotene
- Where
- United Kingdom
- Volunteers
- 85 people, healthy volunteers welcome
- Sponsor
- Newcastle-upon-Tyne Hospitals NHS Trust
Iron Deficiency, Anemia; Deficiency, Nutritional, With Poor Iron Absorption
A Study to Investigate the Effect of Vitamin D3 Supplementation on Iron Status in Iron Deficient Women
Iron is one of the most vital elements in humans as it plays a role in physiological functions such as transferring and storing oxygen, transporting electrons and catalysing numerous reactions, from oxidative metabolism to…
- Conditions
- Iron Deficiency, Anemia; Deficiency, Nutritional, With Poor Iron Absorption, Vitamin D Deficiency
- Trial name
- NCT02714361
- Testing
- Vitamin D3 supplement
- Where
- United Kingdom
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- University of Chester
Vitamin D Deficiency
Efficacy of Daily Vitamin D3 Supplementation in Normal Weight Adolescents
The study is designed to evaluate the increment of serum 25 (OH) vitamin D levels in normal weight adolescents following a 12-week supplementation with Vitamin D3 2000 IU/day.
- Trial name
- NCT01058720
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
Vitamin A Deficiency
Using Stable Isotope Techniques to Monitor and Assess the Vitamin A Status of Children Susceptible to Infection
The combination of infectious diseases and malnutrition is the most prevalent, preventable public health problem in the world, responsible for millions of deaths annually, particularly in infants and children.
- Trial name
- NCT02363985
- Testing
- Mega-dose of vitamin A supplement
- Where
- Ethiopia
- Volunteers
- 138 people, healthy volunteers welcome
- Sponsor
- Ethiopian Public Health Institute
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 D Deficiency, Respiratory Tract Infections
Vitamin D Supplementation for the Prevention of Acute Respiratory Infections: a RCT in Young Finnish Men
Vitamin D intervention effects on the prevention of acute respiratory tract infections among Young Finnish Men
- Trial name
- NCT05014048
- Testing
- Vitamin D3
- Where
- Finland
- Volunteers
- 231 people, healthy volunteers welcome
- Sponsor
- Tampere University