Clinical trials: Hypovitaminosis A
X-Linked Hypophosphatemia
A Study to Describe the Lived Experience of XLH for Adolescents at End of Skeletal Growth
An observational, prospective, mixed-methods study involving the integration of quantitative and qualitative data exploring the lived experience of burosumab-treated adolescents with XLH at the end of skeletal growth.
- Trial name
- NCT05181839
- Testing
- Burosumab
- Where
- 14 sites in France, Germany and 3 more
- Volunteers
- 25 people
- Sponsor
- Kyowa Kirin Pharmaceutical Development Ltd
Chronic Kidney Disease stage3, Chronic Kidney Disease stage4
Phase 3 Safety and Efficacy Study of CTAP101 Extended-release Capsules in Children With Secondary Hyperparathyroidism
This is a phase 3, multi-center, randomized, double-blind, placebo-controlled study in children with stage 3-4 chronic kidney disease (CKD), secondary hyperparathyroidism (SHPT) and vitamin D insufficiency.
- Conditions
- Chronic Kidney Disease stage3, Chronic Kidney Disease stage4, Vitamin d Deficiency, Secondary Hyperparathyroidism
- Trial name
- NCT05543928
- Testing
- CTAP101
- Where
- 2 sites in United States
- Volunteers
- 2 people
- Sponsor
- OPKO Health, Inc.
Vitamin A Deficiency, Iron-deficiency
Impact of Food-to-Food Fortified Cereal Products on Diet Quality in Eldoret, Kenya
The overall hypotheses is that a product designed with optimized nutritional characteristics, based on consumer preferences and leveraging local nutrient dense ingredients, can successfully deliver nutrition through sustainable…
- Trial name
- KenyaMPS (NCT05882682)
- Where
- Kenya
- Volunteers
- 1,800 people, healthy volunteers welcome
- Sponsor
- Purdue University
Hypophosphatasia (HPP)
A Retrospective Study of the Natural History of Patients With Severe Perinatal and Infantile Hypophosphatasia (HPP)
This study aims to characterize the natural history of patients with severe perinatal or infantile onset HPP.
- Trial name
- NCT01419028
- Where
- 12 sites in United States, Australia and 5 more
- Volunteers
- 48 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
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
Vitamin A Deficiency
Retinol Status in Preterm Infants and Mothers
Retinol and retinol binding protein were studied in the umbilical cord blood of 44 preterm infants with gestation age of < 30 weeks. Serum retinol and RBP levels were determined by enzyme-linked immunosorbent assay.
- Trial name
- NCT04780958
- Testing
- Serum retinol and RBP levels were determined by enzyme-linked immunosorbent assay.
- Where
- Turkey (Türkiye)
- Volunteers
- 44 people, healthy volunteers welcome
- Sponsor
- Ataturk University
Vitamin A Deficiency, Iron Deficiency
Effect Of Multiple Biofortified Food Crops On Micronutrient Status And Immune Function Among Indian Infants and Their Mothers
In this study, meals based on multiple food crops (containing either biofortified or commercially-available food crops) will be fed to young children in Madanapalle, Andhra Pradesh, India over a period of nine months to measure…
- Conditions
- Vitamin A Deficiency, Iron Deficiency, Zinc Deficiency
- Trial name
- MBFC (NCT02648893)
- Testing
- Multiple biofortified food crops (MBFC-Exp), Commercially available non-fortified food crops (MBFC-C)
- Where
- 2 sites in India
- Volunteers
- 200 people
- Sponsor
- Cornell University
Hypophosphatasia (HPP)
Safety and Efficacy Study of Asfotase Alfa in Severely Affected Infants With Hypophosphatasia (HPP)
This clinical trial studies the safety and efficacy of asfotase alfa in infants and young children with infantile onset HPP.
- Trial name
- NCT00744042
- Testing
- asfotase alfa
- Where
- 10 sites in United States, Canada and 2 more
- Volunteers
- 11 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
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
Iron Deficiency, Vitamin A Deficiency
Nutritional Status and Bouillon Use in Northern Ghana
This pilot aims to generate data that are critical for informing the design of a planned, more detailed study to evaluate the effect of multiple micronutrient (MN)-fortified bouillon cube on biomarkers of nutrient status of women…
- Conditions
- Iron Deficiency, Vitamin A Deficiency, Vitamin B 12 Deficiency, Folate Deficiency
- Trial name
- NCT04632771
- Testing
- N/A (observational study)
- Where
- Ghana
- Volunteers
- 995 people, healthy volunteers welcome
- Sponsor
- University of California, Davis
HIV Infections, Vitamin A Deficiency
Vitamin A to Reduce HIV in Vaginal Secretions and Prevent Viral Transmission
HIV infected individuals with vitamin A deficiency may be more likely to transmit the virus to others than HIV infected individuals who have normal levels of vitamin A.
- Conditions
- HIV Infections, Vitamin A Deficiency, HIV Seronegativity
- Trial name
- NCT00053612
- Testing
- Vitamin A
- Volunteers
- 400 people
- Sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
Undernutrition
Nutributter Programming to Prevent Undernutrition: an Evaluation
This randomized, controlled effectiveness study examines Nutributter programming within an integrated package of maternal and child health services offered by Haiti's Ministry of Health (MSPP) to prevent undernutrition among…
- Trial name
- NPPU (NCT01552512)
- Testing
- Nutributter Program, Integrated Package
- Where
- Haiti
- Volunteers
- 1,228 people
- Sponsor
- Washington University School of Medicine
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
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
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
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
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
Immunity, Diarrhea
A Study on Immunological Effect of Vitamin A and Zinc in a Placebo Controlled 4 Cell Trial
Vitamin A deficiency in children is associated with increased mortality and morbidity due to respiratory tract and diarrhoeal infections.
- Conditions
- Immunity, Diarrhea, Respiratory Tract Infections
- Trial name
- NCT00374023
- Testing
- Zinc, or Vitamin A or both
- Where
- Bangladesh
- Volunteers
- 147 people
- Sponsor
- International Centre for Diarrhoeal Disease Research, Bangladesh
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