Clinical trials: Vitamin D Deficiency, completed
Neoplasms, Antioxidants
Oxidoreductive Balance and Lysosomal Activity in Cancer Patients.
The research aims to determine the parameters of oxidative stress and inflammatory processes and compare these parameters with the image obtained using positron emission tomography (PET) with 2-deoxy-2-[fluorine-18]fluoro…
- Conditions
- Neoplasms, Antioxidants, Oxidative Stress, Lipid Peroxidation
- Trial name
- NCT03470857
- Testing
- Patients
- Where
- 3 sites in Poland
- Volunteers
- 83 people, healthy volunteers welcome
- Sponsor
- Nicolaus Copernicus University
Vitamin D Deficiency
The Effect Of Vitamin D On Measures Of Bone Health And Gene Expression
Vitamin D deficiency is now recognized as one of the most common vitamin deficiencies in adults in the United States. Vitamin D deficiency has been connected to many chronic health diseases.
- Trial name
- NCT01696409
- Testing
- 400 IU vitamin D3, 2000 IU vitamin D3
- Where
- United States
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- Boston University
Alkaline Phosphatase Deficiency, Vitamin D Deficiency
Serum Alkaline Phosphatase Levels In Healthy Turkish Children
Alkaline phosphatase (ALP), is a metalloenzyme of the plasma membrane. Serum ALP levels in children are closely related to age and gender, many commercial test kits being used in hospitals, are only offering reference values for…
- Trial name
- NCT06689709
- Testing
- Serum Alkaline Phosphatase Levels
- Volunteers
- 1,000 people, healthy volunteers welcome
- Sponsor
- Emine Hafize
Vitamin D Deficiency
A Pilot Study of the Effect of Dietary Fat Type and Amount on Vitamin D3 Absorption
This study will examine whether the amount and type of fat, mono-unsaturated fat (MUFA) vs. poly-unsaturated fat (PUFA), in a meal affects the absorption of vitamin D, which is taken after that meal.
- Trial name
- MUFA/PUFA (NCT01508845)
- Testing
- cholecalciferol
- Where
- United States
- Volunteers
- 61 people, healthy volunteers welcome
- Sponsor
- Tufts University
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
Vitamin D Deficiency
Nutritional Requirements for Vitamin D in Pregnant Women
Randomised, placebo-controlled dose-response intervention study with vitamin D3 in pregnant women.
- Trial name
- DMAT (NCT02506439)
- Testing
- 10 mcg Vitamin D3, 20 mcg Vitamin D3
- Where
- 2 sites in Ireland
- Volunteers
- 144 people, healthy volunteers welcome
- Sponsor
- University College Cork
Cardiovascular Disease, Chronic Kidney Disease
Vascular Risk After Kidney Transplantation
Hypothesis: Nontraditional risk factors, such as inflammation, vitamin D deficiency, elevated PTH, insulin resistance, homocysteine, or uric acid, contribute to cardiovascular disease progression after kidney transplant.
- Conditions
- Cardiovascular Disease, Chronic Kidney Disease, Diabetes, Vitamin D Deficiency
- Trial name
- NCT00374595
- Where
- United States
- Volunteers
- 338 people
- Sponsor
- University of Nebraska
Hypophosphatasia
Safety and Efficacy Study of Asfotase Alfa in Adolescents and Adults 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
- NCT01163149
- Testing
- asfotase alfa
- Where
- 3 sites in United States, Canada
- Volunteers
- 19 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
Vitamin D Deficiency, Pre-Eclampsia
Effect of Vitamin D3 Supplementation in Pregnancy on Risk of Pre-eclampsia
Vitamin D deficient pregnant ladies were selected and randomized into 2 groups for routine daily dose of multivitamin (400IU vitamin D3) versus maximum safest treatment daily dose (4000IU vitamin D3).
- Trial name
- NCT03101150
- Testing
- 400 IU Vitamin D3, 4000 IU Vitamin D3
- Volunteers
- 179 people, healthy volunteers welcome
- Sponsor
- King Fahad Medical City
Hypovitaminosis D, Insulin Resistance
Comparative Effectiveness of Vitamin D and Repletion Strategies
The importance of vitamin D (VitD) in the prevention and treatment of human health conditions has gained increased attention in recent years.
- Conditions
- Hypovitaminosis D, Insulin Resistance, Diabetes
- Trial name
- CEDARS (NCT01524874)
- Testing
- Vitamin D3
- Where
- 2 sites in United States
- Volunteers
- 66 people, healthy volunteers welcome
- Sponsor
- Bastyr University
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
Vitamin D Deficiency
The Role of Narrowband Ultraviolet B Exposure in the Maintenance of Vitamin D Levels During Winter
The investigators investigated the ability of narrowband ultraviolet B (nbUVB) treatment in the maintenance of vitamin D levels achieved during the summer in Finland.
- Trial name
- NCT02275650
- Testing
- nbUVB
- Where
- 2 sites in Finland
- Volunteers
- 37 people, healthy volunteers welcome
- Sponsor
- Joint Authority for Päijät-Häme Social and Health Care
Cirrhosis, Vitamin D Deficiency
Vitamin D Supplementation in Cirrhotic Patients
Previous studies suggested that vitamin D deficiency is highly prevalent in cirrhotic patients and is related to the degree of liver dysfunction as well as mortality.
- Trial name
- NCT02009748
- Testing
- Vitamin D supplementation
- Where
- 2 sites in Austria
- Volunteers
- 36 people
- Sponsor
- Medical University of Graz
Infertility, Female, Infertility
Vitamin D and Polycystic Ovarian Syndrome (PCOS)
Primary Objectives: To evaluate the efficacy of metformin and Vitamin D supplementation on serum insulin and serum androgen levels (Total testosterone, Steroid Hormone Binding Globulin, Free Androgen Index) levels compared…
- Conditions
- Infertility, Female, Infertility, Vitamin D Deficiency
- Trial name
- NCT03989778
- Testing
- Vitamin D
- Where
- 2 sites in Pakistan
- Volunteers
- 84 people, healthy volunteers welcome
- Sponsor
- Aga Khan University
Secondary Hyperparathyroidism, Chronic Kidney Disease-Mineral and Bone Disorder
Injection of Teriparatide to Prevent Hypocalcemia After Parathyroidectomy in Dialysis Patients (TeriCa).
This is a pilot randomized controlled trial aimed to evaluate the effect of teriparatide on the clinical course of hypocalcemia after parathyroidectomy for secondary hyperparathyroidism in dialysis-dependent patients.
- Conditions
- Secondary Hyperparathyroidism, Chronic Kidney Disease-Mineral and Bone Disorder, Dialysis, Hypocalcemia
- Trial name
- TeriCa (NCT04750460)
- Testing
- Teriparatide
- Where
- Russia
- Volunteers
- 20 people
- Sponsor
- Saint Petersburg State University, Russia
Congenital Adrenal Hyperplasia, Familial Hyperinsulinemic Hypoglycemia 1
Baby Detect : Genomic Newborn Screening
Newborn screening (NBS) is a global initiative of systematic testing at birth to identify babies with pre-defined severe but treatable conditions.
- Conditions
- Congenital Adrenal Hyperplasia, Familial Hyperinsulinemic Hypoglycemia 1, Phosphoglucomutase 1 Deficiency, Maturity Onset Diabetes of the Young
- Trial name
- BabyDetect (NCT05687474)
- Where
- Belgium
- Volunteers
- 6,824 people, healthy volunteers welcome
- Sponsor
- Centre Hospitalier Universitaire de Liege
Vitamin D Deficiency, Tuberculosis
Role of Vitamin D in Innate Immunity to Tuberculosis
The investigators proposed a pilot study preparatory to developing a randomized trial of vitamin D for the prevention of TB infection. The specific aims are presented below: 1.
- Trial name
- NCT01244204
- Testing
- Vitamin D
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Harvard School of Public Health (HSPH)
Hypovitaminosis D
The Effect of Hypovitaminosis D and Vitamin D Supplementation on Fracture Nonunion Rates
The purpose of the study is to determine whether vitamin D supplementation in patients with hypovitaminosis D can decrease nonunion (failure to heal) incidence in patients with fractures of the humerus, femur, or tibia.
- Trial name
- VitD (NCT01691833)
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 113 people
- Sponsor
- Wake Forest University Health Sciences
Vitamin D Deficiency
Comparison of Changes in Serum 25(OH)D Concentrations Following Vitamin D Supplementation With Chewable Tablets Versus Pills
This is a 6-month cross-over trial of vitamin D supplementation in 38 healthy men and women aged 18 years and older. The primary aim is to compare the change in serum 25(OH)D concentration following vitamin D supplementation with…
- Trial name
- NCT02158598
- Testing
- Vitamin D chewable tablet supplementation, Vitamin D pill supplementation
- Where
- Canada
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- CHU de Quebec-Universite Laval
COVID, Vitamin D Deficiency
Vitamin D Levels in SARS-CoV-2: Do Current Adequacy Thresholds Reflect Clinical Risk? Insights From a Large Turkish Cohort
Blood vitamin D levels may be associated with severity of viral infections. To find out If there is a statistically significant relation between blood 25-hydroxy vitamin D (25(OH)D) levels and disease severity, patients with…
- Trial name
- NCT04394390
- Testing
- vitamin d
- Where
- Turkey (Türkiye)
- Volunteers
- 1,100 people
- Sponsor
- Bursa City Hospital