Clinical trials: Vitamin D Deficiency, completed
Osteoporosis, Osteopenia
Does Treatment of Hypovitaminosis D Increase Calcium Absorption?
The purpose is to perform a one-year study designed to assess whether treatment of hypovitaminosis D increases intestinal absorption of calcium, subsequent retention of calcium within bone, decreases bone turnover, and favorably…
- Conditions
- Osteoporosis, Osteopenia, Vitamin D Deficiency, Hypoparathyroidism
- Trial name
- NCT00581828
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 19 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Iron Deficiency
Iron-fortified Flavoured Skimmed Milk With or Without Vitamin D in Iron Deficient Women
Iron deficiency and vitamin D deficiencies are common in menstruating women. The present assay studied the influence of the consumption of a flavoured skimmed milk with iron (iron pyrophosphate) or with iron and vitamin D3 in…
- Trial name
- NCT01739907
- Testing
- Iron fortified flavoured skimmed milk with or without vitamin D in iron deficient women
- Volunteers
- 109 people, healthy volunteers welcome
- Sponsor
- National Research Council, Spain
Healthy
Study Comparing Two Isoforms of Vitamin D Supplements for Infants
There are two different types of vitamin D - vitamin D3 (animal source) and vitamin D2 (plant source). Almost all the usual vitamin D preparations for infants available in Canadian pharmacies contain vitamin D3 which may not be…
- Trial name
- NCT01190137
- Testing
- Cholecalciferol (D3) or ergocalciferol (D2)
- Where
- Canada
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- McGill University
Obesity (Disorder), Obesity
Effect of Vitamin D on Body Composition and Functionality of Older Adults
Older adults with obesity often experience a gradual loss of muscle mass and muscle strength, a condition sometimes described as sarcopenic obesity.
- Conditions
- Obesity (Disorder), Obesity, Sarcopenia, Sarcopenia in Elderly
- Trial name
- NCT07275177
- Testing
- Vitamin D
- Where
- Mexico
- Volunteers
- 29 people
- Sponsor
- Universidad Autónoma Benito Juárez de Oaxaca
Type 2 Diabetes Mellitus, Obesity
Effect of Vitamin D Supplementation on the Metabolic Control and Body Composition of Type 2 Diabetes Subjects in Ajman (UAE)
The incidence of type 2 diabetes mellitus and obesity is increasing at an alarming rate both nationally and worldwide. Accumulating evidence suggests that serum cholecalciferol levels may be inversely related to the prevalence of…
- Conditions
- Type 2 Diabetes Mellitus, Obesity, Hypovitaminosis D
- Trial name
- VDIS (NCT02101151)
- Testing
- Vitamin D3(cholecalciferol)
- Where
- United Arab Emirates
- Volunteers
- 87 people
- Sponsor
- Rashid Centre for Diabetes and Research
Secondary Hyperparathyroidism, Chronic Kidney Disease
Vitamin D Deficiency in Chronic Kidney Disease (CKD) Patients
This is an open label, single center, randomized, active comparator controlled study, comparing the effects of vitamin D replacement using oral ergocalciferol versus paricalcitol on parathyroid hormone (PTH) levels in patients…
- Trial name
- NCT00958451
- Testing
- Paricalcitol, Ergocalciferol
- Where
- United States
- Volunteers
- 80 people
- Sponsor
- Salem Veterans Affairs Medical Center
Vitamin D Deficiency, Orthostatic Intolerance
Vitamin D Deficiency and Dysautonomia
In previous work the investigator identified a group of children between the ages of 10-18 years whose diagnostic workup for chronic nausea unexplained by conventional diagnostic tests has unexpectedly revealed underlying…
- Conditions
- Vitamin D Deficiency, Orthostatic Intolerance, Nausea
- Trial name
- NCT03032328
- Testing
- vitamin D supplement
- Where
- United States
- Volunteers
- 31 people, healthy volunteers welcome
- Sponsor
- Wake Forest University Health Sciences
Polycystic Ovary Syndrome, Vitamin D Deficiency
Vitamin D Increases Serum Levels of the Soluble Receptor for Advanced Glycation End Products in Women With PCOS
The purpose of this study is to investigate the mechanism that explain the beneficial clinical effect of vitamin D treatment in women with PCOS.
- Trial name
- NCT03644212
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 79 people, healthy volunteers welcome
- Sponsor
- Maimonides Medical Center
Vitamin D Deficiency
Muscle Metabolic Function in Older Adults With Different Vitamin D Status Before and After Exercise
This is a small pilot aerobic training trial designed to examine differences between normal-high and low vitamin D levels and 7-days of aerobic training on local VO2 measured by non-invasive Hybrid Diffuse Optical Spectroscopy.
- Trial name
- NCT02485197
- Testing
- 7 continuous days of aerobic training
- Where
- United States
- Volunteers
- 7 people, healthy volunteers welcome
- Sponsor
- David Travis Thomas
HIV Infections
The Effect of Alendronate, Calcium, and Vitamin D on Bone Mineral Density in HIV Infected Patients
Alendronate is a drug that is used to treat osteoporosis. The purpose of this study is to examine whether alendronate in combination with calcium and vitamin D is safe and effective for treating bone loss in people with HIV.
- Trial name
- NCT00061256
- Testing
- Alendronate, Calcium carbonate, Vitamin D
- Where
- 28 sites in United States
- Volunteers
- 80 people
- Sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
Scoliosis Idiopathic, Vitamin D Deficiency
Vitamin D Levels in Adolescent Idiopathic Scoliosis
This study aims to estimate the prevalence of vitamin D insufficiency among patients with adolescent idiopathic scoliosis, to calculate the differences in serum vitamin D levels, Cobb angles, spinal bone mass densities, and serum…
- Conditions
- Scoliosis Idiopathic, Vitamin D Deficiency, BMD
- Trial name
- NCT03820895
- Testing
- Blood test
- Volunteers
- 60 people
- Sponsor
- Security Forces Hospital
Gestational Diabetes Mellitus in Pregnancy, Vitamin D Deficiency
Effects of Vitamin D Supplementation on Glucose Metabolism in Women With Former Gestational Diabetes Mellitus
Gestational Diabetes Mellitus (GDM) and vitamin D deficiency are related to insulin resistance and impaired beta-cell function, with heightened risk for future development of diabetes.
- Trial name
- NCT01992133
- Testing
- Vitamin D3
- Where
- Malaysia
- Volunteers
- 26 people
- Sponsor
- RCSI & UCD Malaysia Campus
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
Nutritional Deficiency
The Use of the 25 (OH) D Saliva Test as a Substitute for the 25 (OH) D Serum Test in Healthy People
Routine examination of vitamin D levels is carried out by checking serum 25 (OH)D levels, which indicate circulating vitamin D levels.
- Trial name
- NCT04655664
- Testing
- not currently consumed vitamin D supplements regularly, consumed vitamin D supplements regularly
- Where
- Indonesia
- Volunteers
- 56 people, healthy volunteers welcome
- Sponsor
- Universitas Sumatera Utara
Metabolic Syndrome
Metabolic Syndrome and Insulin Resistance at Allina
Vitamin D deficiency is widespread and appears to represent one easily and inexpensively modifiable risk factor for diabetes and cardiovascular disease.
- Trial name
- MISURA (NCT01545830)
- Testing
- vitamin D3 (cholecalciferol)
- Where
- United States
- Volunteers
- 84 people, healthy volunteers welcome
- Sponsor
- Allina Health System
Ckd-Mbd
Relationship Between Cardiopulmonary Exercise Testing and Ca-P in Chronic Kidney Disease (CKD)
Reductions in exercise capacity associated with exercise intolerance augment cardiovascular disease risk and predict mortality in chronic kidney disease.
- Trial name
- NCT04013139
- Testing
- CPET
- Where
- Iran
- Volunteers
- 200 people
- Sponsor
- Shahid Beheshti University of Medical Sciences
X-linked Hypophosphatemia
Study of KRN23 (Burosumab), a Recombinant Fully Human Monoclonal Antibody Against Fibroblast Growth Factor 23 (FGF23), in Pediatric Subjects With X-linked Hypophosphatemia (XLH)
The objectives of the study are to: Identify a dose and dosing regimen of burosumab, based on safety and pharmacodynamic (PD) effect, in pediatric XLH participants Establish the safety profile of burosumab for the treatment of…
- Trial name
- NCT02163577
- Testing
- burosumab
- Where
- 9 sites in United States, France and 2 more
- Volunteers
- 52 people
- Sponsor
- Kyowa Kirin, Inc.
Pediatric Migraine, Migraine Disorders, Brain
Comorbidity-Based Propranolol Use in Pediatric Migraine
This observational retrospective cohort study aims to identify clinical and biochemical predictors of response to propranolol prophylaxis in pediatric migraine.
- Conditions
- Pediatric Migraine, Migraine Disorders, Brain, Vitamin D Deficiency
- Trial name
- NCT07103031
- Testing
- Behavioral therapy, Propranolol
- Where
- Turkey (Türkiye)
- Volunteers
- 488 people
- Sponsor
- Kayseri University
Deficiency of Vitamin D3
Optimizing Vitamin D in the Elderly
Vitamin D deficiency is highly prevalent in older people in the absence of vitamin D supplementation. The limited data available show marked inter-individual variability in response to vitamin D supplementation in very old, frail…
- Trial name
- NCT01554241
- Testing
- D3 2000 IU/day, D3 4000 IU/day, D3 50,000 IU weekly
- Where
- United States
- Volunteers
- 86 people
- Sponsor
- University of California, San Francisco
Depression, Chronic Liver Disease
Vitamin D Improves Depression in Liver Patients
This study evaluates the efficacy of vitamin D replacement therapy in reducing depressive symptoms in patients with chronic liver disease and vitamin D deficiency.
- Trial name
- CLDVitD (NCT02359266)
- Testing
- Vitamin D
- Where
- Germany
- Volunteers
- 111 people
- Sponsor
- Universität des Saarlandes