Clinical trials: Deficiency, Vitamin D
Vitamin D Deficiency, Metabolic Syndrome
Vitamin D Supplementation and Metabolism in Vitamin D Deficient Elderly
The purpose of this study is to examine the effects of Vitamin D supplementation on the reasons (mechanisms) underlying the development of type 2 diabetes, metabolic syndrome (high blood pressure, cholesterol, diabetes, body…
- Trial name
- VitD (NCT01145703)
- Testing
- RDA Vitamin D3 only, Vitamin D2/3 Repletion only, Vitamin D2/3 Repletion + AEX
- Where
- United States
- Volunteers
- 39 people, healthy volunteers welcome
- Sponsor
- Baltimore VA Medical Center
Chronic Kidney Disease (Stage 3-4), Chronic Kidney Disease Mineral and Bone Disorder
Phosphate Assessment in Chronic Kidney Disease Patients Study
The proposed pilot feeding study aims to explore novel pathways in phosphate metabolism and identify new biomarkers, as well as to develop a compound index for assessing phosphate overload with high validity and reliability.
- Trial name
- PACK (NCT07368946)
- Testing
- Dietary Phosphorus Intake
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University of Texas Southwestern Medical Center
Vitamin D, Iron Deficiency and Overload
Can Vitamin D Replacement Correct Chronic Disease Anemia?
This prospective, single-arm interventional pilot study evaluated whether vitamin D supplementation alone improves iron status in adults with inflammatory bowel disease (IBD) who are in clinical remission and have concurrent…
- Conditions
- Vitamin D, Iron Deficiency and Overload, Inflammatory Bowel Disease (Crohn's Disease; Ulcerative Colitis)
- Trial name
- NCT07673497
- Testing
- Cholecalciferol (Vit D3)
- Where
- Turkey (Türkiye)
- Volunteers
- 43 people
- Sponsor
- Gazi University
Meniere Disease, Osteoporosis
Menier's Disease - Bone Density Study
Meniere's disease is a progressive and debilitating inner ear disease characterised by vertigo and hearing loss. Several studies have linked Menierws disease with lower bone density and lower vitamin D levels.
- Conditions
- Meniere Disease, Osteoporosis, Osteopenia, Vitamin D Deficiency
- Trial name
- NCT05322538
- Testing
- vitamin D plasma levels baseline, Dual-energy X-ray absorptiometry at baseline, cervical Vestibular evoked myogenic potentials at baseline
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- HaEmek Medical Center, Israel
Vitamin D Deficiency
Vitamin D 24'000 IU for Oral Intermittent Supplementation
Vitamin D deficiency (defined as 25(OH)-vitamin D serum level <50 nmol/l) is cured with oral supplementation. National guidelines recommend the administration of 800 IU cholecalciferol daily for an effective treatment, especially…
- Trial name
- DO-IT (NCT03920150)
- Testing
- Vitamin D3, Vitamin D oily capsules
- Where
- Switzerland
- Volunteers
- 58 people
- Sponsor
- University Hospital, Basel, Switzerland
Hypovitaminosis D, Cardiovascular Diseases
Vitamin D Supplementation on in Major Orthopedic Surgery
Prospective, monocentric study in open, aimed at evaluating the effects of supplementation with calcifediol on left ventricular function parameters in cardiopathic subjects undergoing major orthopedic surgery.
- Trial name
- NCT03403933
- Testing
- Didrogyl
- Where
- Italy
- Volunteers
- 74 people, healthy volunteers welcome
- Sponsor
- I.R.C.C.S Ospedale Galeazzi-Sant'Ambrogio
Peripheral Arterial Disease
Pilot Study of Vitamin D Screening Use in Peripheral Arterial Disease Patient Over Maximum Distance Walking
The prevalence of peripheral arterial disease (PAD) is greater than 15%. PAD is associated with an increased risk of cardiovascular death, coronary heart disease and stroke, with a mortality rate of 5% per year.
- Trial name
- First-BLINDOS (NCT03615833)
- Testing
- Cholecalciferol
- Where
- France
- Volunteers
- 27 people
- Sponsor
- University Hospital, Angers
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
Vitamin D Deficiency
Sunlight Exposures Effect on Serum Vitamin D Levels
When people eat a meal, some, but not all of the calcium in that meal is absorbed, that is, moved into the bloodstream. When the skin is exposed to sunlight during summer months, Vitamin D is made there and then modified into…
- Trial name
- NCT00473317
- Testing
- Sun Exposure
- Where
- United States
- Volunteers
- 6 people, healthy volunteers welcome
- Sponsor
- Creighton 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
Chronic Kidney Disease, Vitamin D Deficiency
Cholecalciferol (Vitamin D3) Therapy in Chronic Kidney Disease (CKD) Subjects
This is a 12 week pilot and feasibility study with an enrollment goal of 30 subjects. Half of the subjects will be randomized to vitamin D3 and the other half will receive a placebo.
- Trial name
- NCT00427037
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 34 people
- Sponsor
- Atlanta VA Medical Center
Crohn's Disease (CD), Ulcerative Colitis (UC)
Supplementation of Vitamin D3 in Patients With Inflammatory Bowel Diseases and Hypovitaminosis D
This study aims to evaluate the effect of vitamin D3 supplementation on disease activity and quality of life in IBD patients deficient in vitamin D, and also help determine the optimal dose of vitamin D3 for them.
- Trial name
- NCT01877577
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 30 people
- Sponsor
- University of California, San Francisco
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
Multiple Sclerosis, Relapsing-Remitting, Vitamin D Deficiency
Impact of Vitamin D Supplementation in Patients With Multiple Sclerosis
Vitamin D is important risk factor for developing multiple sclerosis (MS) and for disease progression. Patients with MS who had lower vitamin D levels were at increased risk for more clinical attacks and faster disease…
- Trial name
- NCT03385356
- Testing
- Vitamin D
- Where
- Slovenia
- Volunteers
- 89 people
- Sponsor
- University Medical Centre Maribor
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, Cognitive Decline
High-dose Vitamin D Supplements in Older Adults
This Phase II randomized clinical trial aims to test if supplementation with high dose oral vitamin D will successfully correct vitamin D insufficiency, compared to treatment with standard (RDA) dose vitamin D in a diverse…
- Trial name
- NCT03613116
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 180 people
- Sponsor
- University of California, Davis
Vitamin D Deficiency
FREQUENCY OF VITAMIN D DEFICIENCY IN PREMATURE NEWBORN BORN BEFORE 32 WEEKS AND/OR WITH A BIRTH WEIGHT UNDER 1500g
Vitamin D plays an important role in phosphocalcic metabolism and bone homeostasis in newborns. Premature newborns are at risk of vitamin D deficiency and may require supplementation.
- Trial name
- PremaVitaD (NCT06315452)
- Where
- France
- Volunteers
- 110 people
- Sponsor
- Fondation Hôpital Saint-Joseph
Vitamin D Deficiency
Empirical Comperative Study Of Variation Blood Level Antibody Vitamin D at Different Groups Of Patients Compared Healthy Peoples
The aim of this study is to detect antibodies to vitamin D in the serum at Different Groups of patients and healthy volunteer. A second goal is to find the relation between Vitamin D Antibody and Vitamin D level.
- Trial name
- NCT02795234
- Testing
- Blood samples
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Meir Medical Center
Multi-drug Resistant Tuberculosis
Case Control Study of Vitamin D Status and Adult Multidrug-resistant Pulmonary Tuberculosis in Maharashtra, India
India has the highest incidence of and mortality from multi-drug resistant tuberculosis (MDR-TB) globally. Vitamin D status may be an important determinant of MDR-TB infection and treatment outcomes; however, observational…
- Trial name
- NCT04342598
- Testing
- Serum Vitamin D
- Where
- India
- Volunteers
- 352 people, healthy volunteers welcome
- Sponsor
- Harvard School of Public Health (HSPH)
Vitamin D Deficiency
Optimizing Vitamin D Nutrition in Healthy Adults
The purpose of this study is to determine the average dosage of oral vitamin D supplementation to maintain optimal vitamin D levels in the body and to see if there are differences in the response to oral vitamin D supplementation…
- Trial name
- NCT00327847
- Testing
- Oral Vitamin D Supplementation
- Where
- United States
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Winthrop University Hospital
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