Clinical trials: Vitamin Deficiencies
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 D Deficiency, Tuberculosis
Role of Vitamin D in Innate Immunity to Tuberculosis
The investigators proposed a pilot study preparatory to developing a randomized trial of vitamin D for the prevention of TB infection. The specific aims are presented below: 1.
- Trial name
- NCT01244204
- Testing
- Vitamin D
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Harvard School of Public Health (HSPH)
Vitamin D Deficiency
Vitamin D Status and Its Influencing Factors in Zhejiang Province: A Multicenter Cross-Sectional Study
Vitamin D deficiency is a global public health problem, with an estimated 1 billion people affected worldwide, and large-scale systematic data for Zhejiang Province remain scarce.
- Trial name
- NCT07866391
- Where
- 2 sites in China
- Volunteers
- 10,000 people, healthy volunteers welcome
- Sponsor
- First Affiliated Hospital of Zhejiang University
Metabolic Syndrome X
Study of Chronic Degenerative Diseases
The prevalence of obesity and type 2 diabetes mellitus (DM) in children have been increasing in parallel at an alarming rate. In particular, the increasing prevalence of type 2 DM is attributable to genetic factors, clinical…
- Trial name
- NCT02495961
- Where
- Mexico
- Volunteers
- 57 people, healthy volunteers welcome
- Sponsor
- Asociación Científica Latina A.C.
Hypocalcemia, Hypovitaminosis D
Calcium and Vitamin D Intakes in Children
Calcium (Ca2+) and vitamin D (VitD) play an important role in child health. Aims. The investigators evaluated the daily intake of Ca2+ and VitD in healthy children; and the efficacy of Ca2+ and VitD supplementation.
- Trial name
- NCT01638494
- Testing
- Colecalcium supplement
- Volunteers
- 184 people
- Sponsor
- Federico II University
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
Obese, Vitamin D Deficiency
Roles of Vitamin D and HDL in Obese Children
This is a pilot study to determine the association between Vitamin D deficiency in obese children and low high density lipoprotein (HDL) and dysfunctional HDL.
- Conditions
- Obese, Vitamin D Deficiency, Low HDL
- Trial name
- NCT02135913
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 1 people
- Sponsor
- Xiang-An Li
Acute Respiratory Infections, Critical Illness in Children
Serum Vitamin D Status in Critically Ill Children With Acute Respiratory Infections
Acute respiratory infections (ARIs) are among the leading causes of hospitalization, morbidity, and mortality in children worldwide, particularly among critically ill patients admitted to pediatric intensive care units (PICUs).
- Conditions
- Acute Respiratory Infections, Critical Illness in Children, Vitamin D Deficiency, Pediatric Respiratory Infections
- Trial name
- VITD-ARI (NCT06547749)
- Testing
- Serum 25-Hydroxyvitamin D Assessment
- Where
- Egypt
- Volunteers
- 63 people
- Sponsor
- Assiut University
X-linked Hypophosphatemia (XLH)
Effective Dosing of Burosumab in XLH
X-linked hypophosphataemia (XLH) is a rare, hereditary condition. The genetic defect leads to low blood phosphate levels and vitamin D suppression. Phosphate is required for strong bones and teeth and to store energy in cells.
- Trial name
- NCT07183579
- Where
- United Kingdom
- Volunteers
- 120 people
- Sponsor
- University of Nottingham
Obesity, Vitamin D Deficiency
Effect of Exercise on Vitamin d in Obese
The aim of the current study was to investigate the effect of exercise-induced lipolysis on vitamin D status in obese children. Two types of exercises that have different effects on lipolysis were used.
- Trial name
- NCT05066490
- Testing
- Endurance exercise, Resistance exersises.
- Where
- Saudi Arabia
- Volunteers
- 30 people
- Sponsor
- Taif University
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
Vitamin A Deficiency, Vitamin A Toxicity
Liver and Bone Retinol Levels in Guatemalan Adolescents and Adults
Guatemala has enforced mandatory fortification of sugar with vitamin A (VA) since June 1974 and has led to a highly successful reduction in VA deficiency and associated disease. However, Ribaya-Mercado et al.
- Conditions
- Vitamin A Deficiency, Vitamin A Toxicity, Hypervitaminosis A
- Trial name
- GVAS (NCT04438200)
- Where
- 5 sites in Guatemala, United Kingdom
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Newcastle University
Liver Transplant; Complications, Vitamin D Deficiency
Relationship Between Serum Vitamin D and Outcomes of Liver Transplantation in Cirrhotic Patients Undergoing Liver Transplantation and Effects of Vitamin D Supplementation in Post-transplant Period
The study population is patients with liver cirrhosis undergoing liver transplantation; In this study, the sample will be selected from cirrhosis patients undergoing liver transplantation in Taleghani (Tehran), Imam Khomeini…
- Trial name
- NCT05568836
- Testing
- vitamin D supplementation, control
- Volunteers
- 42 people
- Sponsor
- National Nutrition and Food Technology Institute
Obesity
Vitamin D Supplementation in Vitamin D Deficient Obese Children During Weight-loss Program
1. Analyze the influence of vitamin D supplementation in obese children during weight-loss program on BMI, body composition and bone mineral density. 2.
- Trial name
- NCT02828228
- Testing
- Vitamin D 1200 IU
- Where
- Poland
- Volunteers
- 200 people
- Sponsor
- University Clinical Centre, Gdansk
Vitamin D Deficiency
Community Interventional Trial (CITFOMIST)
The cluster randomized trial (CITFOMIST) was conducted on 15-19-year old guidance and high school students of both genders from different districts of Tehran, the Iranian capital, in winter 2011.
- Trial name
- CITFOMIST (NCT02035423)
- Testing
- 120 IU milk, 200 IU Milk, Non-Fortified Milk
- Where
- Iran
- Volunteers
- 6,000 people, healthy volunteers welcome
- Sponsor
- Tehran University of Medical Sciences
Vitamin D Deficiency
Vitamin D Dose-Response Study to Establish Dietary Requirements in Infants
The research team is comprised of an expert nutrition scientist and a pediatrician with expertise in endocrinology. Both have world-class experience in assessing bone mass in infancy.
- Trial name
- NCT00381914
- Testing
- Vitamin D
- Where
- Canada
- Volunteers
- 132 people, healthy volunteers welcome
- Sponsor
- McGill University
Hypocalcemia, Pseudohypoparathyroidism
Studies of States With Resistance to Vitamin D and Parathyroid Hormone
Patients with confirmed or suspected states with resistance to vitamin D or parathyroid hormone (PTH) will be admitted for diagnosis, treatment review with suggestions for modifications to the current or new treatment and for…
- Conditions
- Hypocalcemia, Pseudohypoparathyroidism, Osteomalacia, Rickets
- Trial name
- NCT00001242
- Where
- United States
- Volunteers
- 70 people
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Vitamin D Deficiency, Obesity
Vitamin D Deficiency and Low Bone Mineral Content in Children
The Vitamin D study is designed to investigate the effect of body fat mass on vitamin D levels in children. Earlier studies have shown that individuals with increased fat mass may have low vitamin D levels.
- Trial name
- VDS (NCT00756899)
- Where
- United States
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- University of Massachusetts, Worcester
Metabolic Bone Disease, Osteopenia
A Study to Assess Metabolic Bone Disease of Prematurity Using an Acoustic Method
The goal of this project is to develop a new noninvasive ultrasound based technique, called vibro-acoustic analysis (VAA), for evaluation of infant bone health with particular application in assessment of bone health in premature…
- Conditions
- Metabolic Bone Disease, Osteopenia, Neonatal Rickets
- Trial name
- NCT04752098
- Testing
- Vibro-acoustic analysis (VAA), based on ultrasound radiation force
- Where
- United States
- Volunteers
- 37 people
- Sponsor
- Mayo Clinic