Clinical trials: Vitamin D Deficiency, completed
Vitamin d Deficiency
Effects of Vitamin D on Cardiovascular Health in Black Women
The goal of this clinical trial is to understand the effects of oral vitamin D3 supplementation on various cardiovascular risk factors in generally healthy, young adult black women who are vitamin D deficient or insufficient at…
- Trial name
- NCT05656742
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- University of Delaware
Hip Fracture, Vitamin D Deficiency
Vitamin D Levels in Frail Elderly Patients With a Hip Fracture
The purpose of this study is to assess whether all frail elderly admitted with hip fracture has a vitamin D deficiency, and if s-25(OH)D deficiency increases the risk of hip fracture in frail elderly.
- Trial name
- NCT01816711
- Where
- Denmark
- Volunteers
- 447 people
- Sponsor
- University of Aarhus
Vitamin D Deficiency, Fat Malabsorption
25-Hydroxyvitamin D Pharmacokinetic Study
To evaluate the pharmacokinetic parameters of orally administered 25-hydroxyvitamin D3 [25(OH)D3] and vitamin D3 from the corresponding serum concentration-time curves in healthy adults and adults with a history of intestinal…
- Trial name
- NCT03401541
- Testing
- Calcifediol, Calciferol
- Where
- United States
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- Boston University
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
Familial Clustering of Vitamin D Deficiency Via Shared Environment: The Korean National Health And Nutrition Examination Survey 2008-2012
Vitamin D deficiency is a modifiable risk factor for poor bone health. Familial correlation of serum 25-hydroxyvitamin D concentration (25(OH)D) was reported in twin- or family-based studies, mostly from Caucasian…
- Trial name
- NCT03349879
- Where
- South Korea
- Volunteers
- 28,551 people, healthy volunteers welcome
- Sponsor
- Yonsei University
Vitamin D Deficiency
Vitamin D Raising and Maintaining Blood Serum 25(OH)D3 Levels
Analyze the amount of change in blood serum Vitamin D levels in patients of 3 different dosing groups and how their levels change over a 3 month period of time.
- Trial name
- VitD (NCT03099759)
- Testing
- Vitamin D
- Volunteers
- 49 people, healthy volunteers welcome
- Sponsor
- The Cleveland Clinic
Sickle Cell Disease, Vitamin D Deficiency
High Dose Vitamin D Supplementation in Children With Sickle Cell Disease
Suboptimal vitamin D status is well reported in sickle cell disease (SCD) patients and associated with a negative impact on health-related quality of life (HRQL).
- Conditions
- Sickle Cell Disease, Vitamin D Deficiency, Health Related Quality of Life, Hand Grip Strength
- Trial name
- NCT06274203
- Testing
- Vitamin D3
- Where
- Egypt
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Zagazig University
Menopause Related Conditions, Vitamin D Deficiency
Vitamin D and Microvascular Function in Postmenopausal Women
Many observational studies have demonstrated links between serum levels of 25-hydroxyvitamin D [25(OH)D] and cardiovascular risk (CVR) factors. Microvascular dysfunction relates not only to CVR but also to metabolic disease.
- Conditions
- Menopause Related Conditions, Vitamin D Deficiency, Cardiovascular Diseases
- Trial name
- NCT05408273
- Testing
- Blood samples and Microvascular function assessment evaluated through laser-Doppler flowmetry by the LASER speckle contrast analysis (LASCA) device
- Where
- Brazil
- Volunteers
- 88 people, healthy volunteers welcome
- Sponsor
- Rio de Janeiro State University
Vitamin D Deficiency
Personalized Vitamin D Supplementation in European and African Americans
The proposed study is a randomized, double-blind, controlled, multi-center clinical trial of six months of daily oral vitamin D3 (cholecalciferol).
- Trial name
- NCT02362269
- Testing
- Vitamin D
- Where
- 2 sites in United States
- Volunteers
- 169 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Hypophosphatemic Rickets, X Linked Dominant
Calcitonin for Treating X-linked Hypophosphatemia
X-linked hypophosphatemia (XLH) is the most common form of inherited rickets in the United States. It also causes bone disease in adults.
- Trial name
- NCT01652573
- Testing
- nasal salmon calcitonin
- Where
- United States
- Volunteers
- 21 people
- Sponsor
- Yale University
Vitamin D Deficiency
Vitamin D and Muscle Strength and Surface (Electromyography) EMG
Vitamin D deficiency is widely prevalent in India. Serum 25(OH)D levels are <20 ng /ml in up to 90% of them. Recently, in a randomized control trial, investigators have shown that dual cholecalciferol and calcium supplementation…
- Trial name
- NCT01190683
- Testing
- Cholecalciferol, Calcium Carbonate, cholecalciferol and calcium carbonate
- Volunteers
- 170 people, healthy volunteers welcome
- Sponsor
- Indian Council of Medical Research
Peritoneal Dialysis-associated Peritonitis, Vitamin D Deficiency
The Effects of Oral Vitamin D Supplementation on the Prevention of Peritoneal Dialysis-related Peritonitis
This is a pilot randomized, controlled trial of Vitamin D supplementation in patients on peritoneal dialysis to determine the feasibility of a future full-scale RCT exploring if oral administration of vitamin D3 could reduce the…
- Trial name
- NCT03264625
- Testing
- Cholecalciferol (2000iu qd), Routine therapy for PD
- Where
- China
- Volunteers
- 60 people
- Sponsor
- Peking University First Hospital
Obesity, Vitamin D Deficiency
The Effect of Weight on Vitamin D Dose Response
Vitamin D3 is a vitamin that is an essential component of biological regulating systems in humans. Sun exposure is the predominant source of vitamin D3. Previous research has shown that vitamin D3 deficiency is common worldwide.
- Trial name
- Weight (NCT01013584)
- Testing
- cholecalciferol
- Where
- United States
- Volunteers
- 67 people, healthy volunteers welcome
- Sponsor
- Creighton University
Rheumatoid Arthritis, Hypovitaminosis D
Treatment of Hypovitaminosis D in Rheumatoid Arthritis
This study recruits individuals with rheumatoid arthritis (RA) and low vitamin D concentrations. Subjects are dosed with vitamin D or placebo for one year.
- Trial name
- NCT00423358
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 22 people
- Sponsor
- University of Wisconsin, Madison
Diabetes Mellitus, Type 2, Kidney Diseases
Effect of Weekly High-dose Vitamin D3 Supplementation on the Association Between Circulatory FGF-23 and A1c Levels
Among Jordanians, there is a high prevalence of T2DM. VDD has also spread rapidly in the past decade. Preliminary results of recent studies have shown that VD3 has a potential role in reducing FBG.
- Trial name
- NCT04682626
- Testing
- Soft gelatin capsules each contains 50 000 IU VD3 (cholecalciferol) equivalents to 1.25 mg.
- Where
- Jordan
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Applied Science Private University
CKD-MBD - Chronic Kidney Disease Mineral and Bone Disorder, Secondary Hyperparathyroidism
The Longitudinal PTH-Study
The main study aim is to quantify the agreement between the analytical results provided by two third generation and two second generation Parathyroid hormone (PTH) assays.
- Conditions
- CKD-MBD - Chronic Kidney Disease Mineral and Bone Disorder, Secondary Hyperparathyroidism, Kidney Replacement
- Trial name
- NCT03464149
- Testing
- One armed study, blood from each patient is analysed by four assays ( two 3rd generation and two 2nd generation assays)
- Where
- Austria
- Volunteers
- 132 people
- Sponsor
- Medical University of Vienna
Asthma-COPD Overlap Syndrome, Vitamin D Deficiency
Impact of Vitamin D3 Administration on Cardiac Autonomic Tone in Asthma Chronic Obstructive Pulmonary Disease(COPD) Overlap Patients
Title:Impact of vitamin D administration on cardiac autonomic tone in Asthma Chronic Obstructive Pulmonary Disease (COPD) Overlap patients: A blinded randomized control trial.
- Conditions
- Asthma-COPD Overlap Syndrome, Vitamin D Deficiency, Cardiac Autonomic Tone
- Trial name
- COPD (NCT03773809)
- Testing
- Vitamin D capsule
- Where
- Bangladesh
- Volunteers
- 50 people
- Sponsor
- Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
Vitamin D Deficiency
Environmental Influences on Vitamin D Status
Vitamin D deficiency is a common problem. The principal source of vitamin D for humans is solar exposure, with cutaneous synthesis of vitamin D by photoconversion of 7-dehydrocholesterol in the skin to pre-vitamin D3.
- Trial name
- Alaska/Hawaii (NCT00780247)
- Where
- United States
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Creighton University
Vitamin D Deficiency
Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children
The purpose of this study is to determine if the vitamin D binding protein genotype influences circulating vitamin D levels and if it may have functional consequences on vitamin D activity.
- Trial name
- VitaD (NCT01050387)
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 193 people, healthy volunteers welcome
- Sponsor
- Yale University
Knee Osteoarthritis, Vitamin D Deficiency
Prospective, Assessment of Vitamin D and Calcium Supplementation, Improvement of Nutritional Status and Preoperative Rehabilitation in Patients Before Knee Arthroplasty.
Prospective randomized study of 150 patients qualified for knee arthroplasty between 2015 and 2017. Patients were randomized into 3 groups receiving vitamin D and calcium supplementation, increased protein supply and preoperative…
- Conditions
- Knee Osteoarthritis, Vitamin D Deficiency, Pain, Postoperative, Arthropathy of Knee
- Trial name
- NCT04291833
- Testing
- Intervention group 1, Intervention group 2, Control group 0
- Where
- Poland
- Volunteers
- 150 people
- Sponsor
- Jagiellonian University