Clinical trials: Vitamin D Deficiency, completed
Hip Fracture
A Randomised, Controlled Comparison of Vitamin D Strategies is Acute Hip Fracture Patients
The purpose of the study is to determine the best dose of Vitamin D to give to hip fracture patients to achieve the optimal therapeutic level.
- Trial name
- NCT00424619
- Testing
- Vitamin D2
- Volunteers
- 64 people
- Sponsor
- McMaster University
Spinal Cord Injuries, Vitamin D Deficiency
Vitamin D Supplementation in Individuals With a Chronic Spinal Cord Injury
The main objective of this placebo-controlled randomized double-blinded study is to investigate the effect of vitamin D supplementation on vitamin D status (25(OH)D concentration in the blood) among individuals with a chronic…
- Trial name
- NCT04652544
- Testing
- Cholecalciferol (Vitamin D3)
- Where
- Switzerland
- Volunteers
- 50 people
- Sponsor
- Swiss Paraplegic Research, Nottwil
Vitamin D Deficiency
Environmental & Genetic Influences on Vitamin D Status
The purpose of this study is to determine the effect of environmental and genetic influences on Vitamin D status.
- Trial name
- NCT01208636
- Where
- United States
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Creighton University
Rickets
Study to Assess the Use of a Simple Lab Test to Screen for Rickets in Children
Some experts recommend that all breastfed babies receive supplemental vitamin D. The purpose of this study is to determine the rate of vitamin D use in breastfed babies, the recommendations of pediatricians regarding vitamin D…
- Trial name
- NCT00502866
- Where
- United States
- Volunteers
- 246 people, healthy volunteers welcome
- Sponsor
- Agency for Healthcare Research and Quality (AHRQ)
Vitamin D Deficiency
Vitamin D Supplementation and Sunlight Exposure in Brazilian Women Living in Opposite Latitudes (The D-SOL Study)
There is a consensus that vitamin D deficiency is a public health issue because of its implications in several diseases including, osteopenia, osteomalacia, heart disease, diabetes (type I and II), inflammatory diseases, multiple…
- Trial name
- D-SOL (NCT03318029)
- Testing
- Vitamin D supplementation
- Where
- 2 sites in Brazil, United Kingdom
- Volunteers
- 136 people, healthy volunteers welcome
- Sponsor
- University of Surrey
D Vitamin Deficiency, Osteocalcin
Serum Vitamin D and Gingival Crevicular Fluid Levels of Osteocalcin and N-Terminal Telopeptide
This study examines the relationship between serum vitamin D levels and bone metabolism markers-osteocalcin and N-terminal telopeptide (NTx)-in gingival crevicular fluid (GCF) of periodontally healthy and periodontitis patients.
- Conditions
- D Vitamin Deficiency, Osteocalcin, Gingival Crevicular Fluid
- Trial name
- NCT06871631
- Where
- Turkey (Türkiye)
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Ondokuz Mayıs University
Vitamin d Deficiency, Central Retinal Vein Occlusion
Vitamin D Levels in Patients With Central Retinal Vein Occlusion- a Prospective Controlled Study
Retinal vein occlusion (RVO) is a common vascular disease of the eye. Studies have shown that the risk of venous thrombosis is higher in winter so even concerning RVO.
- Trial name
- NCT01793181
- Where
- Sweden
- Volunteers
- 216 people
- Sponsor
- St. Erik Eye Hospital
Vitamin D Deficiency
Challenges in Achieving Adequate Vitamin D Status in the Adult Population/ Part 2
The efficiency of different vitamin D formulations in treating suboptimal vitamin D status in adult population will be determined. It will provide insights into the influence of formulation on vitamin D absorption.
- Trial name
- VITAD/2 (NCT03810261)
- Testing
- Oil-based vitamin D, Water-based vitamin D, Vitamin D capsules
- Where
- Slovenia
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- Institute of Nutrition, Slovenia (Nutris)
Vitamin D Deficiency, Hypocalcemia
Effect of Vitamin D Supplement on Disease Activity in SLE
To study the effect of vitamin D supplementation on disease activity of SLE ( SLEDAI-2K ) and IL-6 level
- Conditions
- Vitamin D Deficiency, Hypocalcemia, Hyperparathyroidism, Systemic Lupus Erythematosus (Disorder)
- Trial name
- NCT05260255
- Testing
- vitamin D2 ( calciferol )
- Where
- Thailand
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Department of Medical Services Ministry of Public Health of Thailand
Diabetes Complications, Vitamin D Deficiency
Myocardial Function and Vitamin D Supplementation in Diabetes.
Vitamin D deficiency is recognized as a cardiovascular risk factor. Diabetic patients are of major risk for cardiovascular diseases and typically present with Vitamin D deficiencies.
- Conditions
- Diabetes Complications, Vitamin D Deficiency, Vitamin D Supplementation, Myocardial Dysfunction
- Trial name
- VitaDD (NCT03437421)
- Testing
- Vitamin D3 (cholecalciferol)
- Where
- France
- Volunteers
- 100 people
- Sponsor
- University of Avignon
Deficiency, Vitamin D
Vitamin D Supplementation During Lactation
This randomized, placebo-controlled trial in Thai pregnancy is conducted. The study aims to determine whether vitamin D3 1,800 IU/d supplementation in lactating mother improves vitamin D status of breastfed infant.
- Trial name
- NCT02297568
- Testing
- Calciferol
- Where
- Thailand
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Department of Medical Services Ministry of Public Health of Thailand
Osteoporosis, Vitamin D Deficiency
Physiologic Interactions Between the Adrenal- and the Parathyroid Glands
To investigate possible physiologic interactions between the adrenal- and the parathyroid glands in patients with secondary hyperparathyroidism.
- Conditions
- Osteoporosis, Vitamin D Deficiency, Cardiovascular Disease
- Trial name
- AldOst (NCT02572960)
- Testing
- Valsartan, Cholecalciferol
- Where
- Denmark
- Volunteers
- 81 people
- Sponsor
- University of Aarhus
Prediabetes, Vitamin D Deficiency
Effect of Vitamin D Deficiency and Vitamin D Supplementation on Glucose Metabolism
This study was intended to evaluate the effect of vitamin D supplementation on insulin sensitivity and pancreatic islet beta-cell function.
- Trial name
- NCT00749918
- Testing
- Cholecalciferol (vitamin D3)
- Where
- United States
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- University of Minnesota
Vitamin D Deficiency
The Influence of Food Matrix Delivery System on the Bioavailability of Vitamin D3
This study investigates the influence of different food matrices on the bioavailability of vitamin D. Although most vitamin D comes from skin synthesis in response to sun exposure, dietary intake is also important - especially…
- Trial name
- DFORT (NCT03783273)
- Testing
- Vitamin D3, Whey protein-complex, Water
- Where
- Denmark
- Volunteers
- 30 people
- Sponsor
- University of Aarhus
Chronic Kidney Disease
Ergocalciferol in Chronic Kidney Disease
To examine the effect of ergocalciferol treatment on 25-hydroxyvitamin D and PTH levels in patients with CKD stage 3 and 4
- Trial name
- NCT00411294
- Where
- United States
- Sponsor
- Saint Louis VA Medical Center
Type 2 Diabetes, Nonalcoholic Fatty Liver Disease
Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Diabetes
This study is designed to study the effect of vitamin D intake on the severity of fatty liver and poor glucose control in patients with type 2 diabetes and fatty liver disease.
- Conditions
- Type 2 Diabetes, Nonalcoholic Fatty Liver Disease, Vitamin D Deficiency
- Trial name
- VDLS (NCT02132442)
- Where
- United States
- Volunteers
- 12 people
- Sponsor
- University of Massachusetts, Worcester
Chronic Kidney Diseases, Deficiency, Vitamin D
Drug Metabolizing Enzyme and Transporter Function in Chronic Kidney Disease
This study investigates the effect of vitamin D deficiency on drug metabolism and transport in patients with chronic kidney disease (CKD) and in healthy controls.
- Trial name
- NCT02360644
- Testing
- Cholecalciferol
- Where
- 2 sites in United States
- Volunteers
- 23 people, healthy volunteers welcome
- Sponsor
- University of Colorado, Denver
Vitamin D Deficiency, Spinal Cord Injury
Vitamin D Supplementation in Wheelchair Indoor Athletes
There is a high prevalence of vitamin D deficiency in Switzerland. In indoor-athletes as well as wheelchair users, vitamin D deficiency occurs even more often.
- Conditions
- Vitamin D Deficiency, Spinal Cord Injury, Drug Effects, Dietary Supplements
- Trial name
- VitD_SCI (NCT02621320)
- Testing
- Vitamin D
- Where
- Switzerland
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Swiss Paraplegic Research, Nottwil
Vitamin D 25 OH Deficiency
A Prospective Open-label Comparison of Two Vitamin D3 Repletion Strategies in Vitamin D Deficient Patients
The purpose of this study is to determine whether one of two Vitamin D3 (cholecalciferol) oral treatment regimens is superior to the other in normalizing Vitamin 25 OHD serum levels.
- Trial name
- NCT01650883
- Testing
- Cholecalciferol, Cholecalciferol 5,000 IU
- Where
- United States
- Volunteers
- 56 people
- Sponsor
- University of South Florida
Vitamin d Deficiency, Preeclampsia
25- Hydroxyvitamin D Levels in Pregnancy and Effects on Pregnancy Related Disorders
Evaluation of 25- Hydroxyvitamin D levels in pregnant women in Austria and potential related disorders Hypothesis: Austrian pregnant women are Vitamin D deficient Present vitamin D supplementation in pregnancy is insufficient…
- Conditions
- Vitamin d Deficiency, Preeclampsia, Preterm Delivery, Gestational Hypertension
- Trial name
- VIDIS (NCT04637880)
- Where
- Austria
- Volunteers
- 249 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna