Clinical trials: Vitamin D Deficiency, completed
Osteoporosis, Vitamin D Deficiency
A Study to Evaluate the Safety, Tolerability, and Efficacy of an Investigational Drug and Dietary Supplement in Men and Postmenopausal Women With Osteoporosis (0217A-227)
The purpose of this study is to test the safety, tolerability and effectiveness of an investigational drug and dietary supplement to reduce the risk of vitamin D insufficiency and deficiency during the treatment of osteoporosis…
- Trial name
- NCT00092066
- Testing
- MK0217A, alendronate sodium (+) cholecalciferol / Duration of Treatment: 15 weeks
- Volunteers
- 717 people
- Sponsor
- Organon and Co
Asthma, Vitamin D Deficiency
Vitamin D Deficiency and Asthma Exacerbation
The study aim is in two phases. First phase: to evaluate the influence of vitamin D deficiency on asthma severity, degree of airway obstruction and frequency of asthma exacerbations.
- Conditions
- Asthma, Vitamin D Deficiency, Disease Exacerbation
- Trial name
- AVD (NCT02661191)
- Testing
- oral cholecalciferol
- Volunteers
- 119 people
- Sponsor
- University of Turin, Italy
Vitamin D Inadequacy, Vitamin D Deficiency
Clinical Approaches to Correcting Vitamin D Inadequacy and Maintaining Adequacy
Vitamin D is available in two forms, vitamin D2 and vitamin D3. It has previously been assumed that these two forms maintain blood vitamin D equally. However, this may not be the case.
- Trial name
- D2/D3 (NCT00692120)
- Testing
- Cholecalciferol (vitamin D3), Ergocalciferol (vitamin D2)
- Where
- United States
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
PRF, Vitamin D Deficiency
Effect of Vitamin D Deficiency on the Structure of Titanium Platelet-Rich Fibrin
ABSTRACT The aim of the study was to compare the macroscopic properties, chemical degradation levels, and fibrin network structures of T-PRF membranes obtained from systemically healthy individuals with optimal vitamin D levels…
- Conditions
- PRF, Vitamin D Deficiency, Vitamin Deficiency
- Trial name
- T-Prf (NCT06870786)
- Testing
- Vitamin D (Cholecalciferol )
- Where
- Turkey (Türkiye)
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- Abant Izzet Baysal University
Vitamin d Deficiency
The Effect of UV-C Enriched Foods on Vitamin D Deficiency
This study is an experimental design study in which demographic characteristics, food consumption, biochemical parameters and anthropometric measurements of individuals with low vitamin D levels before and after consuming…
- Trial name
- NCT06098820
- Testing
- Vitamin D status
- Where
- Turkey (Türkiye)
- Volunteers
- 48 people, healthy volunteers welcome
- Sponsor
- Okan University
Vitamin D Deficiency
Vitamin D3 Supplementation Pilot Study
The purpose of this research study is to determine whether taking vitamin D, every day, over a 12 week period will improve the vitamin D status, risks for poor heart health, risks for developing type 2 diabetes, and/or muscle…
- Trial name
- NCT01546103
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 39 people, healthy volunteers welcome
- Sponsor
- Children's Hospital of Philadelphia
Covid19, Vitamin D Deficiency
High Dose Vitamin-D Substitution in Patients With COVID-19: a Randomized Controlled, Multi Center Study
The world is currently facing a pandemic with the coronavirus (SARS-CoV-2) which leads to the disease of COVID-19. Risk factors for a poor outcome of COVID-19 have so far been identified as older age and co-morbidity including…
- Conditions
- Covid19, Vitamin D Deficiency, Corona Virus Infection, ARDS
- Trial name
- VitCov (NCT04525820)
- Testing
- Single high dose vitamin D, Treatment as usual vitamin D
- Where
- 2 sites in Switzerland
- Volunteers
- 80 people
- Sponsor
- Prof. Dr. Jörg Leuppi
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
Vitamin D Deficiency, Obesity
Vitamin D Deficiency in Obese Adolescent Girls and Influence of Vitamin D on Insulin Secretion and Sensitivity
Sub-clinical vitamin D deficiency is a commonly unrecognized disorder in obese adolescents. The investigators hypothesize vitamin D deficiency will be highly prevalent in obese adolescents and those who are vitamin D deficient…
- Conditions
- Vitamin D Deficiency, Obesity, Insulin Resistance
- Trial name
- NCT00850694
- Where
- United States
- Volunteers
- 114 people
- Sponsor
- University of Alabama at Birmingham
Hypovitaminosis D, Pregnancy Complications
Effect of Vitamin D Replacement on Maternal and Neonatal Outcomes
The optimal vitamin D replacement dose during pregnancy remains undefined. Therefore, the aim of this study is to test the hypothesis that a daily equivalent dose of vitamin D of 3,000 IU/day is needed for Middle Eastern women…
- Conditions
- Hypovitaminosis D, Pregnancy Complications, Infant, Newborn, Diseases
- Trial name
- NCT02434380
- Testing
- Euro D
- Where
- Lebanon
- Volunteers
- 330 people, healthy volunteers welcome
- Sponsor
- American University of Beirut Medical Center
Fibromyalgia, D Vitamin Deficiency
Valuation of Efficacy and Safety of Vitamin D3 Use in 80 Women Diagnosed With Fibromyalgia. Using FIQ Score and VAS.
Fibromyalgia is a disease that significantly decreases the quality of life of people who suffer from it, has great repercussions at the socio-economic level due to the incapacity it produces.
- Trial name
- NCT03369379
- Testing
- D3 Vitamin
- Where
- Mexico
- Volunteers
- 80 people
- Sponsor
- Universidad Autonoma de Nuevo Leon
Vitamin D Deficiency
Effects of Vitamin D Supplementation on Strength, Bone Density, and Injury Risk in Collegiate Athletes
The goal of this study is to determine whether Vitamin D supplementation improves strength and bone density, and reduces the risk of injury in collegiate athletes.
- Trial name
- NCT03151174
- Testing
- Vitamin D 10000 UNT, Vitamin D 5000 UNT
- Where
- United States
- Volunteers
- 68 people, healthy volunteers welcome
- Sponsor
- Virginia Polytechnic Institute and State University
Overweight, Hypovitaminosis D
Effects of Vitamin D Supplementation on Obesity, Inflammatory and Metabolic Markers
46 eligible overweight women with hypovitaminosis D are assigned to either vitamin D or control group using block randomization method.
- Trial name
- NCT05376865
- Testing
- Vitamin D supplement
- Where
- Iran
- Volunteers
- 46 people, healthy volunteers welcome
- Sponsor
- Tirang R. Neyestani, Ph.D.
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
Vitamin D Deficiency, Military Activity
Vitamin D Supplementation in Estonian Conscripts
A longitudinal, double-blinded, randomized, trial, with a 10 month follow-up period will be conducted between July 2021 to May 2022
- Conditions
- Vitamin D Deficiency, Military Activity, Physical Stress
- Trial name
- NCT04939636
- Testing
- Vitamin D3 capsules 4000IU/100µg., Vitamin D3 capsules 600IU/15µg.
- Where
- Estonia
- Volunteers
- 112 people, healthy volunteers welcome
- Sponsor
- Tartu University Hospital
Obesity, Insulin Resistance
Correction of Vitamin D Levels and Its Effect on Insulin Resistance and Weight Gain in Obese Youth
Vitamin D deficiency is extremely common in obese youth. In our obese population followed in the Endocrinology clinic at Children's Medical Center Dallas, vitamin D levels were inversely correlated with a measure of insulin…
- Conditions
- Obesity, Insulin Resistance, Vitamin D Deficiency
- Trial name
- NCT02168660
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 109 people
- Sponsor
- Perrin C White, MD
Congestive Heart Failure, Hypovitaminosis D
Pilot Study: Hypovitaminosis D, Hyperparathyroidism and Hypomagnesemia in Patients With Congestive Heart Failure
People with heart failure may have low magnesium and low vitamin D levels. They may also have abnormally high levels of parathyroid hormones.
- Conditions
- Congestive Heart Failure, Hypovitaminosis D, Hyperparathyroidism
- Trial name
- NCT00887666
- Where
- United States
- Volunteers
- 48 people
- Sponsor
- State University of New York - Downstate Medical Center
Vitamin D Deficiency
Effect of Vitamin D Oral Supplements on 25 OH Vitamin D Levels
Vitamin D deficiency is common world wide. 25 OH vitamin D level is the best indicator of vitamin D status. Vitamin D supplements are available as vitamin D2 or D3, in small daily or large weekly/monthly doses.
- Trial name
- NCT01170494
- Testing
- ergocalciferol 2000 IU orally, daily, ergocalciferol 25000 IU oraly every 2 weeks, ergocalciferol 50000 IU orally every 4 weeks
- Where
- Saudi Arabia
- Volunteers
- 279 people, healthy volunteers welcome
- Sponsor
- King Faisal Specialist Hospital & Research Center
Vitamin D Deficiency
Food-based Solutions for Optimal Vitamin D Nutrition and Health
This project aims at proving the efficacy and safety of food based solutions to prevent vitamin D deficiency in high risk populations of Caucasian and South Asian origin living in Denmark.
- Trial name
- ODIN_FOOD (NCT02631629)
- Testing
- Non-fortified foods, Fortified foods
- Where
- Denmark
- Volunteers
- 143 people, healthy volunteers welcome
- Sponsor
- Technical University of Denmark
Vitamin D Deficiency
Evaluating Vitamin D Content in Mushrooms
This study will evaluate how much vitamin D is present in a mushroom supplement. This supplement contains an extract from mushrooms that have been exposed to sunlight.
- Trial name
- NCT01815437
- Testing
- Mushroom Vitamin D2, Cholecalciferol, Vitamin D2 - Ergocalciferol
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Boston University