Clinical trials: Vitamin D
Vitamin D Deficiency
Controlled Trial of Prenatal Vitamin D3 Supplementation to Prevent Vitamin D Deficiency in Mothers and Their Infants
The purpose of this research study is to compare the effects of higher dose vitamin D with commonly recommended dose in pregnant women to see which is better in achieving and/or maintaining sufficient vitamin D blood levels…
- Trial name
- PA 03-103 (NCT00610688)
- Testing
- Prenatal Vitamin, Cholecalciferol (Vitamin D3)
- Where
- 2 sites in United States, United Arab Emirates
- Volunteers
- 192 people, healthy volunteers welcome
- Sponsor
- Children's Hospital Medical Center, Cincinnati
Atopic Dermatitis
Effects of Lactobacillus Reuteri Plus Vitamin D3 in Children With Atopic Dermatitis
The purpose of this study is to evaluate in a randomized, double-blinded, controlled trial, whether a new food supplement containing Lactobacillus reuteri DSM 17938 and vitamin D3 (Reuterin® D3) may improve the SCORAD in…
- Trial name
- NCT02945683
- Testing
- Reuterin D3
- Where
- Italy
- Volunteers
- 88 people, healthy volunteers welcome
- Sponsor
- Noos S.r.l.
Other Preterm Infants, Vitamin D Deficiency
The Effect of Vitamin D Administration to Premature Infants on Vitamin D Status and Respiratory Morbidity
This trial objective is to assess whether doubling the daily intake of vitamin D improves serum vitamin D levels and serves as primary prevention of respiratory infections and asthma in premature infants.
- Conditions
- Other Preterm Infants, Vitamin D Deficiency, Bronchiolitis, Asthma
- Trial name
- NCT02404623
- Testing
- Vitamin D
- Where
- Israel
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Soroka University Medical Center
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
Osteoporosis, Fractures
Determination of Optimum Age for DXA Screening for Osteoporosis in HIV - The Probono 1 Study
The purpose of this study is to determine the bone mineral density in male and female patients with HIV infection according to age groups.
- Conditions
- Osteoporosis, Fractures, HIV Infection
- Trial name
- Probono1 (NCT01669954)
- Where
- United Kingdom
- Volunteers
- 440 people, healthy volunteers welcome
- Sponsor
- King's College London
Vitamin D Deficiency
Impact of Vitamin D Status on Bones in Breastfed Infants
Vitamin D deficiency is widespread and linked to decreased bone mineral content. Little data exists regarding the vitamin D status and the relationship of 25-hydroxyvitamin D (25-OHD) status to functional bone health outcomes in…
- Trial name
- NCT00697294
- Testing
- Tri-Vi-Sol
- Where
- 3 sites in United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Baylor College of Medicine
Vitamin D Deficiency
Vitamin D Among Young Adults: an Intervention Study Using a Mobile 'App'.
The purpose of this study is to examine whether a behavioural intervention changes attitudes, knowledge, intake or blood levels of vitamin D in young adults.
- Trial name
- NCT02118129
- Testing
- an educational video, wait listed
- Where
- Canada
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- University of Guelph
Hypovitaminosis D
Vitamin D Status and the Adequacy of Vitamin D Intake in Early Preterm Infants
Vitamin D is an essential nutrient. Deficiency of vitamin D is widespread. The prevalence of vitamin D deficiency in early preterm infants is unknown.
- Trial name
- NCT01793402
- Where
- United States
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Children's Hospital Medical Center, Cincinnati
Vitamin D
Correlation Between Vitamin D and Symptoms Severity of Autonomic Nervous Mediated Syncope Child and it 's RAAS
children ; autonomic nervous mediated syncope； vitamin D ; symptom score ; renin-angiotensin-aldosterone-system
- Trial name
- NCT04844957
- Testing
- Vitamin D, Full automatic chemiluminescence measuring instrument
- Where
- China
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Kongyujie
Idiopathic Sudden Sensorineural Hearing Loss
Mechanism and Application of Vitamin D in Idiopathic Sudden Sensorineural Hearing Loss
Clinical Trial Protocol: Investigating the Therapeutic Efficacy of Vitamin D in ISSNHL。Core Research Questions Can vitamin D supplementation improve the prognosis of Idiopathic Sudden Sensorineural Hearing Loss (ISSNHL)? What…
- Trial name
- N (NCT07045883)
- Testing
- Vitamin D Supplementation+ standard treatment, standard treatment
- Where
- China
- Volunteers
- 197 people, healthy volunteers welcome
- Sponsor
- Zhongshan Hospital Xiamen University
Vitamin D Deficiency
Vitamin D Deficiency Still Growing
Vitamin D deficiency has become one of the most prevalent health problems in modern society. However, there has been no study that has reported the trend of vitamin D status in Asia.
- Trial name
- NCT03304795
- Volunteers
- 39,759 people, healthy volunteers welcome
- Sponsor
- DongGuk University
Covid-19, Respiratory Tract Infections
Cod Liver Oil for Covid-19 Prevention Study
A randomized, parallel-group treatment, quadruple masked, two-arm study to assess the effectiveness of cod liver oil compared to placebo in the prevention of Covid-19 and airway infections in healthy adults.
- Trial name
- NCT04609423
- Testing
- Cod liver oil
- Where
- Norway
- Volunteers
- 47,210 people, healthy volunteers welcome
- Sponsor
- Oslo 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
Anovulatory Infertility
Efficacy of Injectable Vitamin D Supplementation in Females With Polycystic Ovary Syndrome
Poly cystic Ovarian Syndrome (PCOS) is an endocrine disorder of reproductive age defined by "the presence of any two out of three criteria: oligo and/or anovulation, excess androgen activity and/or polycystic ovarian morphology…
- Trial name
- NCT06045351
- Testing
- Vitamin D, Active Comparator
- Where
- Pakistan
- Volunteers
- 142 people, healthy volunteers welcome
- Sponsor
- Aga Khan University
Hypovitaminosis D
Vitamin D, Blood Pressure, Lipids, Infection and Depression
There are numerous indications for a relation between low serum levels of 25(OH)D and blood pressure, lipid levels, frequency of infections and tendency towards depression.
- Trial name
- NCT00960232
- Testing
- Cholecalciferol
- Where
- Norway
- Volunteers
- 250 people, healthy volunteers welcome
- Sponsor
- University of Tromso
Influenza Vaccine, Immune Response
Evaluation of Metabolic Predictors of Influenza Vaccine Immune Response in the Singapore Elderly Population - the DYNAMIC Trial
The trial aims to evaluate role of metabolic factors including systemic 25-OH D and diabetes in the adaptive immune response (haemagluttination inhibition titer) to influenza vaccine in the elderly.
- Conditions
- Influenza Vaccine, Immune Response, Elderly, Vitamin D Deficiency
- Trial name
- NCT03399357
- Testing
- Influenza Vaccine
- Where
- Singapore
- Volunteers
- 240 people, healthy volunteers welcome
- Sponsor
- Tan Tock Seng Hospital
Vitamin D Deficiency
Preoperative Vitamin D Levels and Respiratory Complications of General Anesthesia
Vitamin D deficiency is a commonly observed health problem in the world. With a role in many chronic diseases and especially lung diseases, the importance of vitamin D deficiency in anesthesia management is increased.
- Trial name
- VitaminD (NCT03342651)
- Testing
- Vitamin D
- Volunteers
- 95 people, healthy volunteers welcome
- Sponsor
- Ordu University
Keratoconus
Thyroid Gland Dysfunction and Vitamin D Polymorphism in Keratoconus
This prospective study the thyroid gland dysfunction and vitamin D receptor polymorphism in keratoconus patients
- Trial name
- NCT05073601
- Testing
- ELISA,DNA extraction
- Where
- Egypt
- Volunteers
- 262 people, healthy volunteers welcome
- Sponsor
- Mansoura University
Diarrhea-predominant Irritable Bowel Syndrome
Effects of Vitamin D on Gut Microbiota, Intestinal Barrier in IBS-D Patients
Irritable bowel syndrome (IBS) is a common functional gastrointestinal disease. Evidence suggests that the concentration of serum VD is decreased in IBS patients, particularly in IBS-D.
- Trial name
- NCT05593367
- Where
- China
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Second Affiliated Hospital of Xi'an Jiaotong University
Respiratory Infection
Human Lung Responses to Respiratory Pathogens
For most individuals, the lung has a remarkable ability to deal with exposure to a variety of inhaled bacteria. Some individuals, however, do have recurrent bacterial infections, usually in the form of acute or chronic bronchitis…
- Trial name
- NCT01967628
- Testing
- Vitamin D3 (cholecalciferol)
- Where
- United States
- Volunteers
- 98 people, healthy volunteers welcome
- Sponsor
- University of Iowa
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