Clinical trials: Vitamin D Deficiency, completed
Infant, Very Low Birth Weight, Calcium Deficiency
Identifying Vitamin D Deficiency in Very Low Birth Weight Infant (VLBW) Infants Part 2
This study is to determine the amount of vitamin D required for a very low birth weight infant to reach vitamin D sufficiency and achieve optimal calcium health and bone growth.
- Conditions
- Infant, Very Low Birth Weight, Calcium Deficiency, Vitamin D Deficiency
- Trial name
- NCT01363167
- Testing
- 400 IU Cholecalciferol- Vitamin D Daily
- Where
- 2 sites in United States
- Volunteers
- 68 people
- Sponsor
- Medical University of South Carolina
Vitamin D Deficiency
Vitamin D Status and Supplementation in Athletes
The objectives of this study are 1) to assess the prevalence of vitamin D deficiency in a group of sub elite athletes and 2) to identify seasonal changes in vitamin D status and the effect that supplementation may have during the…
- Trial name
- D-status (NCT02008201)
- Testing
- vitamin D
- Where
- Netherlands
- Volunteers
- 153 people, healthy volunteers welcome
- Sponsor
- Wageningen University
Vitamin D Deficiency, Renal Failure Chronic Requiring Hemodialysis
Hemodialysis Vitamin D Pilot
Vitamin D is a prohormone obtained through diet, supplementation, or sun exposure. Once absorbed, this nutritional vitamin D undergoes a two-step reaction in the liver and in the kidney to become the active hormone, calcitriol.
- Trial name
- NCT01214928
- Testing
- Cholecalciferol
- Where
- Canada
- Volunteers
- 20 people
- Sponsor
- St. Joseph's Healthcare Hamilton
HIV Infections
Vitamin D Reabsorption in Adolescents and Young Adults With HIV Infection
The purpose of this study is to test the effects of Vitamin D on renal phosphate and bone loss, which are common in HIV infected adolescents and young adults being treated with tenofovir.
- Trial name
- NCT00490412
- Testing
- Vitamin D supplement
- Where
- 15 sites in United States, Puerto Rico
- Volunteers
- 207 people
- Sponsor
- University of North Carolina, Chapel Hill
Diabetes Mellitus Type 2, Vitamin D Deficiency
Vitamin D Supplementation in Patients With Diabetes Mellitus Type 2
Background and Objectives : The presence of vitamin D deficiency in patients with type 2 diabetes mellitus (T2DM) is associated with an increased risk of cardiovascular disease (CVD).
- Trial name
- DIMENSION (NCT01741181)
- Testing
- Vitamin D supplementation
- Where
- Singapore
- Volunteers
- 64 people
- Sponsor
- Tan Tock Seng Hospital
Age-related Macular Degeneration, Vitamin D Deficiency
Omega 3 and Vitamin D Dosage in a Population With Moderate to High Risk of AMD
Objectives: The investigators conducted a prospective study in Belgium with the objective to determine the proportion of subjects identified at moderate-to-high risk for AMD, based on the STARS® questionnaire, in need of…
- Trial name
- OVID-AMD (NCT04482465)
- Testing
- blood sample
- Where
- Belgium
- Volunteers
- 50 people
- Sponsor
- Universitaire Ziekenhuizen KU Leuven
Chronic Kidney Diseases
SOP's for CKD-MBD-Biomarkers
CKD-MBD (Chronic Kidney Disease - Mineral and Bone Disorder) is an extensive disease and includes dysfunction of the mineral metabolism, the bone metabolism and cardiovascular diseases in the context of renal insufficiency.
- Trial name
- NCT02708368
- Testing
- blood withdrawal
- Where
- 2 sites in Germany
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- RWTH Aachen University
Vitamin D Deficiency
The GLOBAL Vitamin D Study. A Genomic, Transcriptomic, Proteomic and Metabolomic Approach
The effect of vitamin D supplementation on genetic, proteomic , and metabolomic profile in adipose tissue will be studied in 50 subjects.
- Trial name
- NCT02783924
- Testing
- Cholecalciferol
- Where
- Norway
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- University of Tromso
Type 1 Diabetes Mellitus, Vitamin D Deficiency
Vitamin D Supplementation and Glycemic Control Improvement Among Type 1 Diabetic Children
Type 1 diabetes mellitus (T1DM) is an immune-mediated disease characterized by diminished insulin secretion due to damage to islets of Langerhans in the pancreas, which eventually results in high levels of glucose in the blood.
- Trial name
- NCT05141968
- Testing
- vitamin D supplements (2000 IU/day)
- Where
- Palestinian Territories
- Volunteers
- 80 people
- Sponsor
- Al-Azhar University
Vitamin D Deficiency
Vitamin D in Pediatric Crohn's Disease
Background: Crohn's disease (CD), a type of Inflammatory Bowel Disease (IBD), is a chronic relapsing inflammatory disorder of the digestive system.
- Trial name
- NCT01187459
- Testing
- Vitamin D
- Where
- 2 sites in Canada
- Volunteers
- 87 people
- Sponsor
- University of British Columbia
X-linked Hypophosphatemia
An Extension Study of KRN23 in Adults With X-Linked Hypophosphatemia
The primary purpose of this study is to assess the safety and efficacy of repeated subcutaneous (SC) injections of KRN23 in adult subjects with X-Linked Hypophosphatemia (XLH).
- Trial name
- NCT01571596
- Testing
- KRN23
- Where
- 6 sites in United States, Canada
- Volunteers
- 23 people
- Sponsor
- Kyowa Kirin Co., Ltd.
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
Phosphorus and Calcium Disorders, Chronic Kidney Disease Mineral and Bone Disorder
Calcium and Phosphorus Whole-Body Balance and Kinetics in Patients With Moderate Chronic Kidney Disease
This pilot study aims to develop a method for simultaneous whole-body calcium and phosphorus balance and full kinetic modeling of both ions in patients with chronic kidney disease.
- Conditions
- Phosphorus and Calcium Disorders, Chronic Kidney Disease Mineral and Bone Disorder, Chronic Kidney Diseases
- Trial name
- NCT04019379
- Testing
- High Phosphorus Diet, Low Phosphorus Diet
- Where
- United States
- Volunteers
- 3 people
- Sponsor
- University of Minnesota
Nephrolithiasis, Urolithiasis
Vitamin D Repletion in Stone Formers With Hypercalciuria
Vitamin D plays a critical role in maintaining bone health, as well as preventing cardiovascular disease, cancer, and various autoimmune diseases, such as diabetes.
- Conditions
- Nephrolithiasis, Urolithiasis, Idiopathic Hypercalciuria, Vitamin D Deficiency
- Trial name
- NCT01295879
- Testing
- Ergocalciferol
- Where
- United States
- Volunteers
- 30 people
- Sponsor
- New York Presbyterian Hospital
Vitamin D Deficiency, Periodontitis
25-Hydroxyvitamin D Levels in Patients With Periodontitis (Stage III)
Periodontitis; is an inflammatory disease of tissues characterized by bone destruction around the teeth. Vitamin D plays an important role in several inflammatory diseases by promoting the expression of inflammatory cytokines…
- Trial name
- NCT05343273
- Testing
- taking a blood sample
- Where
- Turkey (Türkiye)
- Volunteers
- 83 people, healthy volunteers welcome
- Sponsor
- Ataturk University
Hidradenitis Suppurativa, Mediterranean Diet
Nutritional Status and Hidradenitis Suppurativa (Acne Inversa)
Hidradenitis suppurativa (HS) is a chronic inflammatory, debilitating skin disorder. The exacerbating factors of HS include nutrition and adiposity.
- Conditions
- Hidradenitis Suppurativa, Mediterranean Diet, Body Composition, Vitamin D Deficiency
- Trial name
- NutriHidra (NCT03683238)
- Testing
- Mediterranean Diet
- Volunteers
- 81 people, healthy volunteers welcome
- Sponsor
- Federico II University
IVF, Body Weight
Nutritional Status of Women Undergoing in Vitro Fertilization
Infertility affects around 15 % of couples in their reproductive years. Even though the use of assisted reproductive technologies (ART) in aforementioned couples is increasing, their success rate is still relatively low.
- Conditions
- IVF, Body Weight, Nutrient Deficiency, Dietary Vitamin B12 Deficiency Anemia
- Trial name
- NCT05865015
- Where
- 2 sites in Slovenia
- Volunteers
- 69 people, healthy volunteers welcome
- Sponsor
- University Medical Centre Ljubljana
Precursor Cell Lymphoblastic Leukemia-Lymphoma, Vitamin D Deficiency
Nutrition and Body Composition in Acute Lymphoblastic Leukemia
Many adolescents with acute lymphoblastic leukemia (ALL) have been found to have low bone density by the end of treatment. This can lead to long-term suffering in survivors due to poor bone health.
- Trial name
- NCT01317940
- Testing
- Vitamin D and Calcium Citrate
- Where
- United States
- Volunteers
- 76 people, healthy volunteers welcome
- Sponsor
- Children's Hospital Los Angeles
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
Healthy Volunteers
Predictive Questionnaire for Vitamin D Insufficiency in Healthy Adults
The purpose of this clinical study is to evaluate the metrological properties of a questionnaire that aims to identify the vitamin D status in reference to a vitamin D blood dosage.
- Trial name
- NCT02408679
- Testing
- Blood sampling, Predictive questionnaire for vitamin D insufficiency
- Where
- France
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Lesieur