Clinical trials: Vitamin D Deficiency, completed
Overweight and Obesity, Overweight Adolescents
Efficacy of Oral Vitamin D Supplementation in Adolescents and Young Adults.
This study assesses whether oral supplementation with vitamin D contributes to the reduction of body mass index and lipid profile in adolescents and young adults.
- Conditions
- Overweight and Obesity, Overweight Adolescents, Vitamin D Deficiency
- Trial name
- SIMBAIII (NCT04377386)
- Testing
- 1000 IU D vitamin, 200 IU D vitamin
- Where
- Colombia
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Fundación Cardiovascular de Colombia
Asthma, Vitamin D Resistant Rickets
Assessment Of Vitamin D Role In The Pathogenesis Of Asthma In Vitamin D Resistent Patients
Research Title: Evaluation of airway reactivity, allergy and inflammatory mediators in exhaled breath condensate in vitamin D resistant rickets.
- Trial name
- NCT01578824
- Testing
- Methacholine Challenge Test
- Where
- Israel
- Volunteers
- 26 people, healthy volunteers welcome
- Sponsor
- Rambam Health Care Campus
Vitamin D Deficiency
The Effect of Maternal and Neonatal Vitamin D Levels on Respiratory Distress Syndrome in Preterm Infants
Respiratory distress syndrome (RDS) of the newborn, also called as hyaline membrane disease, is the most common cause of respiratory distress in premature infants, correlating with structural and functional lung immaturity.
- Trial name
- NCT02024490
- Where
- Turkey (Türkiye)
- Volunteers
- 100 people
- Sponsor
- Kanuni Sultan Suleyman Training and Research Hospital
Deficiency, Vitamin D, Elderly, Frail
The Effect of Calcifediol (Hy.D 25 SD/S) and Vitamin D3 on Muscle Strength in a Frail Elderly Population
In an ageing population, the need for interventions to help older people remain healthy, active and independent for as long as possible, increases.
- Trial name
- D-Fit (NCT02349282)
- Testing
- Calcifediol 10ug/day, Vitamin D3 20ug/day
- Where
- Netherlands
- Volunteers
- 78 people, healthy volunteers welcome
- Sponsor
- Wageningen University
Type 2 Diabetes, Vitamin D Deficiency
African American Children, Glycemic Control, and Type 2 Diabetes
Using a randomized, placebo-controlled trial design in subjects with vitamin D deficiency, the investigators propose to determine if vitamin D treatment improves glycemic control in vitamin D deficient subjects with T2DM.
- Trial name
- ACT (NCT01325987)
- Testing
- Vitamin D2, Sugar pill
- Where
- United States
- Volunteers
- 31 people
- Sponsor
- University of Alabama at Birmingham
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
Vitamin D Deficiency
Does Supplementing Vitamin D Deficiency Affect Fusion Healing Rates in Elective Foot and Ankle Surgery?
To assess if vitamin D status in the elective foot and ankle fusion population affects fusion healing categorically (fused vs. un-fused).
- Trial name
- NCT04450199
- Testing
- Vitamin D2
- Where
- United States
- Volunteers
- 25 people
- Sponsor
- Allegheny Singer Research Institute (also known as Allegheny Health Network Research Institute)
Calcium and Vitamin D Deficiencies
Calcichew D3 Preference Study in Participants Eligible for Calcium and Vitamin D Supplementation.
The purpose of this study is to compare the preference of Calcichew D3 500/400 (containing 500 mg calcium and 400 IU of vitamin D) with Adcal-D3 600/400 (containing 600 mg of calcium and 400 IU of vitamin D) in Test Group 1, and…
- Trial name
- NCT02457247
- Testing
- Calcichew D3, Adcal-D3, Kalcipos-D
- Where
- 9 sites in Germany, United Kingdom
- Volunteers
- 276 people
- Sponsor
- Takeda
Vitamin D Deficiency, Primary Open- Angle Glaucoma
Associations of Vitamin D Deficiency and Vitamin D Receptor Polymorphisms With the Risk of Primary Open-angle Glaucoma
This study investigated whether vitamin D receptor gene polymorphism is altered in primary open-angle glaucoma subjects carrying the risk allele and vitamin D deficiency is an important factor in the development of glaucoma.
- Trial name
- NCT02539745
- Testing
- Vitamin D receptor polymorphic analysis, Serum levels of 1a, 25-Dihydroxyvitamin D3
- Where
- China
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Lv Yingjuan
Deficiency, Vitamin D, Insulin Resistance
Vitamin D Supplementation and and Glycemic Indexes
Age affect insulin sensitivity and the metabolism, and vitamin D status was shown to have a correlation with markers of insulin resistance.
- Trial name
- NCT03478475
- Testing
- cholecalciferol (Euro-Pharm International, Canada)
- Volunteers
- 115 people, healthy volunteers welcome
- Sponsor
- Université d'Auvergne
Vitamin D Deficiency
Alternative Treatments of Vitamin D Deficiency
The purpose of the study is to compare the efficiency of UVB and vitamin D supplementation in treatment of vitamin D deficiency.
- Trial name
- NCT01512537
- Testing
- Narrowband UVB, Vitamin D and calcium
- Where
- Sweden
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- Lund University
Hypophosphatasia (HPP)
Extension Study of Protocol ENB-006-09 - Study of Asfotase Alfa in Children With Hypophosphatasia (HPP)
This clinical trial studies the long term safety and efficacy of asfotase alfa in children with HPP who completed Study ENB-006-09 (NCT00952484).
- Trial name
- NCT01203826
- Testing
- Asfotase Alfa
- Where
- 2 sites in United States, Canada
- Volunteers
- 12 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
Vitamin D Deficiency, Central Sensitisation
Central Sensitization in Vitamin D Deficiency
The purpose of this study is to investigate the presence of central sensitization in vitamin D deficiency and its effect on cutaneous silent period, pain, and quality of life.
- Trial name
- NCT03420378
- Testing
- vitamin D
- Where
- Turkey (Türkiye)
- Volunteers
- 51 people
- Sponsor
- Marmara University
Vitamin D Deficiency
Safety and Bioefficacy of Vitamin D2 and Vitamin D3
The aim of this study is to investigate the bioavailability of vitamin D2 and D3 as measured by the increase of the specific hydroxy forms in serum (25(OH)D2 and 25(OH)D3, respectively, and by total 25(OH)D.
- Trial name
- NCT01503216
- Testing
- cholecalciferol, ergocalciferol
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Ulrike Lehmann
Vitamin D Deficiency
Comparison of Changes in Serum 25(OH)D Concentrations Following Vitamin D Supplementation With Chewable Tablets Versus Pills
This is a 6-month cross-over trial of vitamin D supplementation in 38 healthy men and women aged 18 years and older. The primary aim is to compare the change in serum 25(OH)D concentration following vitamin D supplementation with…
- Trial name
- NCT02158598
- Testing
- Vitamin D chewable tablet supplementation, Vitamin D pill supplementation
- Where
- Canada
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- CHU de Quebec-Universite Laval
Polycystic Ovary Syndrome, Healthy
Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism
Background: Polycystic ovary syndrome (PCOS) is as common as 5-10% of all women in Austria. PCOS women frequently present with metabolic disturbances, hyperandrogenism and infertility. New therapy concepts are warranted.
- Conditions
- Polycystic Ovary Syndrome, Healthy, Vitamin D Deficiency
- Trial name
- NCT01721915
- Testing
- Vitamin D supplementation
- Where
- Austria
- Volunteers
- 330 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Nutritional Rickets
Vitamin D and Genetics in Nutritional Rickets
The purpose of this study is: 1. To compare the response of rickets to calcium with and without vitamin D. 2. To assess whether vitamin D increases calcium absorption in calcium deficiency rickets. 3.
- Trial name
- NCT00949832
- Testing
- Vitamin D + Calcium, Calcium, Vitamin D2
- Where
- Nigeria
- Volunteers
- 109 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
Healthy
Defining Vitamin D Insufficiency in School Age Children: A Randomized Placebo Controlled Trial of Vitamin D3
The study objective is to characterize the threshold levels of serum 25-hydroxyvitamin D for the definition of vitamin D insufficiency in 8-14 year old African American and Caucasian children.
- Trial name
- Vitamin D RCT (NCT00732758)
- Testing
- Vitamin D3 1000 IU
- Where
- United States
- Volunteers
- 157 people, healthy volunteers welcome
- Sponsor
- University of Pittsburgh
Hemodialysis, Hyperphosphatemia
Outcome Study of Lanthanum Carbonate Compared With Calcium Carbonate in Hemodialysis Patients : Landmark Study
The purpose of this study is to demonstrate decrease in cardiovascular mortality and morbidity in Japanese hemodialysis patients treated with Lanthanum carbonate compared with those with Calcium carbonate.
- Trial name
- LANDMARK (NCT01578200)
- Testing
- Lanthanum Carbonate, Calcium Carbonate
- Where
- Japan
- Volunteers
- 2,309 people
- Sponsor
- Translational Research Center for Medical Innovation, Kobe, Hyogo, Japan
Vitamin D Deficiency, Injuries
Vitamin D Status Among Competitive Female Gymnast and Swimmers After Winter Time
As indoor athletes, competitive gymnasts and swimmers can face the problem of a potential vitamin D deficiency. In the last decades, indoor sports participants have been faced with the problem of an institutionalized lifestyle…
- Conditions
- Vitamin D Deficiency, Injuries, Cardiovascular Risk Factor, Nutritional Deficiency
- Trial name
- NCT03584256
- Where
- Slovenia
- Volunteers
- 31 people
- Sponsor
- University of Ljubljana