Clinical trials: Vitamin D Deficiency, completed
Vitamin D Deficiency
Optimization of Blood Levels of 25(OH)-Vitamin D in African Americans
Two-thirds of the US population, particularly African Americans (AA), is at risk for inadequate or deficient 25-hydroxy-vitamin D (25(OH)VD).
- Trial name
- NCT04939792
- Testing
- Vitamin D, Vitamin D + L-cysteine, L-cysteine
- Where
- United States
- Volunteers
- 165 people, healthy volunteers welcome
- Sponsor
- Louisiana State University Health Sciences Center Shreveport
Psoriasis, Vitamin D Deficiency
The Effect of Vitamin D Supplementation on Psoriasis Severity
The study evaluates the effect of oral vitamin D supplementation on the severity of psoriasis measured by Psoriasis Area Severity Index (PASI) in adults with lower vitamin D levels.
- Trial name
- NCT03334136
- Testing
- 25-Hydroxyvitamin D
- Where
- Norway
- Volunteers
- 115 people
- Sponsor
- University Hospital of North Norway
Polycystic Ovary Syndrome, Vitamin D Deficiency
Association of Vitamin D Status With Metabolic Markers in Adolescents With Polycystic Ovary Syndrome
This prospective cross-sectional case-control study aims to investigate the relationship between serum vitamin D levels, visceral adipose tissue (VAT) thickness, and metabolic parameters in adolescents diagnosed with polycystic…
- Conditions
- Polycystic Ovary Syndrome, Vitamin D Deficiency, Insulin Resistance
- Trial name
- NCT06970821
- Where
- Turkey (Türkiye)
- Volunteers
- 106 people, healthy volunteers welcome
- Sponsor
- Bagcilar Training and Research Hospital
Coronavirus Disease 2019 (COVID-19)
Increased Risk of Severe Coronavirus Disease 2019 in Patients With Vitamin D Deficiency
In this prospective observational study we aim to study the association of vitamin D deficiency with adverse clinical outcomes in patients infected with Coronavirus disease 2019
- Trial name
- COVIT-D (NCT04403932)
- Where
- Spain
- Volunteers
- 300 people
- Sponsor
- Hospital San Carlos, Madrid
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
A Study to Assess the Effectiveness of an Investigational Drug in Elderly Subjects With Low Vitamin D Levels (0822A-009)
This study will assess the effectiveness of an investigational drug in elderly subjects with low vitamin D levels.
- Trial name
- NCT00242476
- Testing
- MK0822A
- Volunteers
- 216 people, healthy volunteers welcome
- Sponsor
- Merck Sharp & Dohme LLC
Healthy Subjects, Vitamin D Deficiency
hCAP18 Levels and Vitamin D Deficiency in Healthy Subjects
Vitamin D deficiency (low levels of vitamin D in the blood) is a common problem. A recently discovered protein, called hCAP18, likely plays an important role in the immune system and may depend on adequate levels of vitamin D.
- Trial name
- NCT00742235
- Testing
- ergocalciferol
- Where
- United States
- Volunteers
- 99 people, healthy volunteers welcome
- Sponsor
- Massachusetts General Hospital
Burns, Bone Demineralization
Evaluation of Vitamin D Status in Children With Acute Burns
To see which vitamin D supplement (D2 vs D3) is most beneficial in burned children.
- Trial name
- VitaminD (NCT00536276)
- Testing
- Vitamin D2, Vitamin D3
- Where
- United States
- Volunteers
- 50 people
- Sponsor
- Shriners Hospitals for Children
Osteopenia, Renal Osteodystrophy
Osteopenia and Renal Osteodystrophy: Evaluation and Management
The purpose of this study is to demonstrate whether pamidronate will preserve or increase bone mass in patients with adynamic bone disease, caused by low bone turnover.
- Trial name
- NCT00108394
- Testing
- pamidronate
- Where
- United States
- Sponsor
- US Department of Veterans Affairs
Vitamin D Deficiency
Intervention Study of Vitamin D Supplementation to Prevent Cardiovascular Disease
This is a 9 months, randomized, single center, open-label, parallel-group study to compare the efficacy and safety parameters of vitamin D supplementation in vitamin D deficiency subjects in China.
- Trial name
- NCT03339427
- Testing
- vitamin D, control
- Where
- China
- Volunteers
- 100 people
- Sponsor
- Chinese PLA General Hospital
Cancer Breast, Hypovitaminosis D
Influence of Preoperative Vitamin D Level on Postoperative Pain in Breast Cancer Surgery Patients
Vitamin D deficiency is a general problem that vigorously affects human health . Breast cancer is the most frequently diagnosed life-threatening cancer in women and the leading cause of cancer death among women.Vitamin D…
- Trial name
- NCT06551688
- Testing
- Serum 25(OH)D level
- Where
- Egypt
- Volunteers
- 184 people
- Sponsor
- Fayoum University
Vitamin D Deficiency, Chronic Renal Insufficiency
Vitamin D and Chronic Renal Insufficiency
Purpose of this study is to investigate the effect of treatment with vitamin D3 (cholecalciferol) compared with placebo in a trial including chronic kidney disease patients with vitamin D deficiency.
- Trial name
- NCT00968877
- Testing
- Cholecalciferol
- Volunteers
- 56 people
- Sponsor
- Odense University Hospital
Vitamin D Deficiency
The Effect of Fat on Vitamin D Absorption
The purpose of this study is to evaluate the absorption of dietary supplement of vitamin D3 (cholecalciferol), through the variation of 25 (OH) D levels, as the fat content of the meal associated with the administration of the…
- Trial name
- VITD_100484 (NCT01519986)
- Testing
- Vitamin D3
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Federal University of Rio Grande do Sul
Diabetes Mellitus, Vitamin D Deficiency
The Effects of Vitamin D Supplementation on Patients With Type 2 Diabetes and Vitamin D Deficiency
Vitamin D plays a key role in keeping normal mineral balance and maintaining bone health. There is accumulating evidence linking deficient vitamin D status with both type 1 and type 2 diabetes.
- Trial name
- VDD (NCT01991054)
- Testing
- vitamin D3
- Where
- Israel
- Volunteers
- 45 people
- Sponsor
- HaEmek Medical Center, Israel
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
Hypophosphatasia
Open-Label Study of Asfotase Alfa in Infants and Children ≤ 5 Years of Age With Hypophosphatasia (HPP)
This clinical trial was conducted to study hypophosphatasia (HPP), a bone disorder caused by gene mutations or changes. These gene mutations cause low levels of an enzyme needed to harden bone.
- Trial name
- NCT01176266
- Testing
- asfotase alfa
- Where
- 23 sites in United States, Australia and 10 more
- Volunteers
- 69 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
Epilepsy
Effect of Three Different Doses of Oral Cholecalciferol on 25-Hydroxyvitamin D Changes Among Epilepsy Patients With Hypovitaminosis D
To characterize the effect of three different doses of vitamin D3 supplementation on serum 25-hydroxyvitamin D (25(OH)D) changes in epilepsy patients receiving enzyme-inducing antiepileptic drugs (EIAEDs) versus patients…
- Trial name
- NCT02890823
- Testing
- Cholecalciferol
- Volunteers
- 210 people
- Sponsor
- Chulalongkorn University
HIV Infection
Immune Reconstitution in HIV Disease (IREHIV)
The aim with this study is to provide immunotherapy with vitamin D and phenylbutyrate to treatment-naive HIV infected patients to induce important antimicrobial defence mechanisms and decreased inflammation.
- Trial name
- IREHIV (NCT01702974)
- Testing
- vitamin D (cholecalciferol) and PBA (sodium phenylbutyrate)
- Where
- Ethiopia
- Volunteers
- 279 people
- Sponsor
- Karolinska Institutet
Hyperparathyroidism; Secondary, Renal
Efficacy and Safety of Cinacalcet in Ca, P and iPTH Levels in Patients With Mild, Moderate and Severe SHPT
1. To evaluate achievement ratio of iPTH,Calcium and phosphorus after taking Cinacalcet HCL in hemodialysis subjects with mild, moderate and severe SHPT; 2.
- Trial name
- ACTIVE (NCT03123406)
- Testing
- Cinacalcet HCl
- Where
- China
- Volunteers
- 750 people
- Sponsor
- Kyowa Kirin China Pharmaceutical Co., Ltd.
Vitamin D Deficiency
Safety of Vitamin D Supplementation in Older Persons
This study will evaluate the safety over 6 months of two different doses of vitamin D (cholecalciferol) in men and women age 65 and older. It will also evaluate if supplementation with vitamin D improves physical performance.
- Trial name
- NCT00681590
- Testing
- cholecalciferol (vitamin D)
- Where
- United States
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- University of Miami