Clinical trials: Deficiency, Vitamin D
Iron Deficiency, Anemia; Deficiency, Nutritional, With Poor Iron Absorption
A Study to Investigate the Effect of Vitamin D3 Supplementation on Iron Status in Iron Deficient Women
Iron is one of the most vital elements in humans as it plays a role in physiological functions such as transferring and storing oxygen, transporting electrons and catalysing numerous reactions, from oxidative metabolism to…
- Conditions
- Iron Deficiency, Anemia; Deficiency, Nutritional, With Poor Iron Absorption, Vitamin D Deficiency
- Trial name
- NCT02714361
- Testing
- Vitamin D3 supplement
- Where
- United Kingdom
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- University of Chester
Vitamin D Deficiency
Efficacy of Daily Vitamin D3 Supplementation in Normal Weight Adolescents
The study is designed to evaluate the increment of serum 25 (OH) vitamin D levels in normal weight adolescents following a 12-week supplementation with Vitamin D3 2000 IU/day.
- Trial name
- NCT01058720
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
Obesity, Vitamin D Deficiency
Vitamin D Supplementation Reduces Renin-Angiotensin System Activity in Obesity
Hypothesis: Vitamin D supplementation lower renin-angiotensin system activity in obesity. Specific Aim: To investigate whether Vitamin D supplementation in obesity improves the vascular sensitivity to angiotensin II.
- Conditions
- Obesity, Vitamin D Deficiency, Hypertension
- Trial name
- NCT01068418
- Testing
- Vitamin D (cholecalciferol)
- Where
- United States
- Volunteers
- 26 people
- Sponsor
- Brigham and Women's Hospital
Stroke, Oral Disease
Oral Health and Vitamin D in Stroke Patients
Stroke is a common, serious and restrictive global health problem. Restricting the activities of daily living of stroke patients impairs patients' ability to pay attention to oral hygiene.
- Conditions
- Stroke, Oral Disease, D Vitamin Deficiency
- Trial name
- NCT05418335
- Testing
- Clinical examination, functional status evaluation
- Where
- Turkey (Türkiye)
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Abant Izzet Baysal University
D Vitamin Deficiency Patients
Vitamin D Supplementation and the Immune Response
The main objective is to assess the variation in plasma levels of cathelicidin before and after influenza vaccination. All bibliographic data suggests that supplementation vitamin D in the elderly often deficient in this vitamin…
- Trial name
- NCT01893385
- Testing
- Vitamin D (drug)
- Where
- France
- Volunteers
- 37 people
- Sponsor
- University Hospital, Clermont-Ferrand
Arthralgia, Musculoskeletal Complications
Vitamin D Deficiency, Muscle Pain, Joint Pain, and Joint Stiffness in Postmenopausal Women Receiving Letrozole For Stage I-III Breast Cancer
This phase II trial is studying vitamin D deficiency, muscle pain, joint pain, and joint stiffness in postmenopausal women receiving letrozole for stage I-III breast cancer.
- Conditions
- Arthralgia, Musculoskeletal Complications, Pain, Recurrent Breast Cancer
- Trial name
- NCT00416715
- Testing
- letrozole, calcium carbonate, laboratory biomarker analysis
- Where
- United States
- Volunteers
- 100 people
- Sponsor
- University of Washington
Renal Osteodystrophy
Zoledronic Acid to Prevent Bone Loss After Kidney Transplantation
The purpose of this study is to determine whether zolendronic acid, a third generation bisphosphonate, is effective in preventing bone loss in the first year after kidney transplantation.
- Trial name
- NCT01675089
- Testing
- Zoledronic acid
- Where
- Brazil
- Volunteers
- 34 people
- Sponsor
- University of Sao Paulo General Hospital
Vitamin D Deficiency Defined as Serum 25OHD < 75 Nmol/l or 30ng/ml, Preeclampsia
Vitamin D and Preeclampsia
Hypothesis : Vitamin D serum concentration is decreased in the first trimester in pregnant women who will develop preeclampsia in the second or third trimester compare to a control group Primary purpose : To determine the vitamin…
- Conditions
- Vitamin D Deficiency Defined as Serum 25OHD < 75 Nmol/l or 30ng/ml, Preeclampsia, Neonatal Hypercalcemia, Pregnancy
- Trial name
- FEPED (NCT01648842)
- Where
- France
- Volunteers
- 3,173 people
- Sponsor
- Assistance Publique - Hôpitaux de Paris
Vitamin D Deficiency
Vitamin D and Health Status of British African-Caribbean Women
Vitamin D deficiency remains a global public health issue (Wilson 2017). In the United Kingdom (UK). There is a lack of research looking at vitamin D status of the British African-Caribbean population.
- Trial name
- NCT04179370
- Testing
- N/A - no intervention. Observational study.
- Where
- United Kingdom
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University of Surrey
Hypertension, Vitamin D Deficiency
Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study
Adequate levels of vitamin D are essential for bone health at all ages but low levels of vitamin D may also negatively impact other aspects of health such as blood pressure.
- Trial name
- BBC (NCT03070483)
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 5 people, healthy volunteers welcome
- Sponsor
- Loyola University
Vitamin D Deficiency
Determination of Vitamin D Dose to Maintain Sufficiency Amongst Indian and Malay Women in the Tropics
Much research on vitamin D status has focused on seasonal variations in serum 25(OH)D levels in populations living at high altitudes and those of light-skinned Caucasian extraction, with little work done in multi ethnic…
- Trial name
- NCT02389179
- Testing
- Vitamin D3
- Where
- Malaysia
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Sharifah Faradila bt Wan Muhamad Hatta
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
Vitamin D Deficiency, Sarcopenia
Vitamin D Deficiency and Body Composition in the Patients With Hemophilia
Hemophilia is associated with osteoporosis and increased prevalence of low bone mineral density (BMD). Many clinical risk factors have been reported, such as hemophilic arthropathy, reduced physical activity, decreased sun…
- Conditions
- Vitamin D Deficiency, Sarcopenia, Osteoporosis, Body Composition
- Trial name
- NCT05517070
- Where
- Taiwan
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Tsung-Ying Li
Hypertension, Vitamin D Deficiency
Effects of Vitamin D on Renin Expression in Hypertensive Patients
The cardiovascular effects of vitamin D therapy (in humans) have been documented only in patients with known vitamin D deficiency or hyperparathyroidism (a surrogate marker of inadequate vitamin D activity).
- Trial name
- NCT00585442
- Testing
- calcitriol
- Where
- United States
- Volunteers
- 12 people
- Sponsor
- University of Utah
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
Burn
High-Dose Vitamin D Deficiency in Burn Injury
High dose Vitamin D (50,000IU) therapy may increase bone mineral density/bone mineral content after large burns.
- Trial name
- VitaminD (NCT00591604)
- Testing
- Vitamin D
- Sponsor
- The University of Texas Medical Branch, Galveston
Tumor Induced Osteomalcia, Osteomalacia
A Natural History Study of Bone and Mineral Disorders
This study has four objectives: 1) to provide investigators the opportunity to study bone specimens from patients with various skeletal diseases; 2) to treat patients with skeletal diseases at the NIH; 3) to expose NIH trainees…
- Conditions
- Tumor Induced Osteomalcia, Osteomalacia, Familial Tumoral Calcinosis
- Trial name
- NCT00024804
- Where
- United States
- Volunteers
- 1,000 people
- Sponsor
- National Institute of Dental and Craniofacial Research (NIDCR)
Deficiency, Vitamin D
Vitamin D Status After Single Oral Dose of Cholecalciferol in Low Fat Meal Compared to High-fat Meal
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
- VITDAB_08606 (NCT00968734)
- Testing
- colecalciferol
- Where
- Brazil
- Volunteers
- 30 people
- Sponsor
- Federal University of Rio Grande do Sul
Nutritional Rickets
Vitamin D and Genetics in Nutritional Rickets
The purpose of this study is: 1. To compare the response of rickets to calcium with and without vitamin D. 2. To assess whether vitamin D increases calcium absorption in calcium deficiency rickets. 3.
- Trial name
- NCT00949832
- Testing
- Vitamin D + Calcium, Calcium, Vitamin D2
- Where
- Nigeria
- Volunteers
- 109 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
Vitamin D Deficiency
Vitamin D Supplementation in Overweight/Obese African American Adults and Youth (D-SUNNY)
Primary Specific Aim 1: To compare the dose-responsive effects of vitamin D3 supplementations on 25(OH) D, parathyroid hormone (PTH), and serum/urine calcium.
- Trial name
- D-SUNNY (NCT01583621)
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 74 people, healthy volunteers welcome
- Sponsor
- Augusta University
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