Clinical trials: Vitamin D Deficiency, completed
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.
Insulin Resistance
Effect of Vitamin D Supplementation on Oral Glucose Tolerance Among Obese Adolescents
Childhood obesity is a rapidly growing epidemic in the US and the world. Current estimates suggest that 30% of our nation's children are either overweight ot obese.
- Trial name
- NCT01856946
- Testing
- 4,000 IU vitamin D3
- Where
- United States
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- University of Missouri-Columbia
Vitamin D Deficiency
The Role of Vitamin D in Female Reproductive Tract Immunity
The purpose of this study is to assess the impact of approximately 8 weeks of Vitamin D (VitD) and calcium supplementation, using daily versus weekly supplementation regimens, on female reproductive tract immunity.
- Trial name
- NCT02186535
- Testing
- Vitamin D and Calcium
- Where
- United States
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- CONRAD
Crohn Disease, Vitamin D Deficiency
Effect of Vitamin D Supplementation on Infliximab Response in Patients With Crohn's Disease
Background: It remains uncertain whether vitD3 supplementation is beneficial for remission of Crohn's disease (CD). The influence of vitD3 supplementation on Infliximab (IFX) efficacy was retrospectively analyzed in Chinese CD…
- Conditions
- Crohn Disease, Vitamin D Deficiency, Vitamin D Supplement
- Trial name
- NCT04606017
- Testing
- Caltrate Pill
- Where
- China
- Volunteers
- 70 people
- Sponsor
- Second Affiliated Hospital of Wenzhou Medical University
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
Osteoporosis, Exercise Overtraining
High-intensity Interval Training and Vitamin D Effects on Bone Metabolism Among Women Diagnosed With Osteoporosis
The effects of 16-week high-intensity interval training (HIIT) and vitamin D supplements on bone mineral density (BMD) in women with osteoporosis.
- Conditions
- Osteoporosis, Exercise Overtraining, Vitamin D 25-Hydroxylase Deficiency
- Trial name
- NCT06624657
- Testing
- vitamin D supplements fo 16 weks
- Volunteers
- 120 people
- Sponsor
- King Saud University
Hypophosphatemic Rickets, X-Linked Dominant
Effect of Cinacalcet on Parathyroid Hormone Secretion in Children and Adolescents With Hypophosphatemic Rickets
This study will measure the effect of cinacalcet (Sensipar) on parathyroid hormone (PTH) secretion in children and adolescents with hypophosphatemic rickets (XLH).
- Trial name
- NCT00195936
- Testing
- Cinacalcet
- Where
- United States
- Volunteers
- 8 people
- Sponsor
- Children's Mercy Hospital Kansas City
Endometriosis, Vitamin D Deficiency/Insufficiency
Analysis of Vitamin D and VDR Expression in Endometriosis: A Case-Control Study
The goal of this cross-sectional prospective matching study is to evaluate whether serum vitamin D levels and vitamin D receptor (VDR) expression are associated with the presence and severity of endometriosis in women of…
- Conditions
- Endometriosis, Vitamin D Deficiency/Insufficiency, Vitamin D Status
- Trial name
- NCT06289257
- Testing
- Vitamin D level, Vitamin D receptor
- Where
- Thailand
- Volunteers
- 108 people, healthy volunteers welcome
- Sponsor
- Khon Kaen University
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
Vitamin D Deficiency
Familial Clustering of Vitamin D Deficiency Via Shared Environment: The Korean National Health And Nutrition Examination Survey 2008-2012
Vitamin D deficiency is a modifiable risk factor for poor bone health. Familial correlation of serum 25-hydroxyvitamin D concentration (25(OH)D) was reported in twin- or family-based studies, mostly from Caucasian…
- Trial name
- NCT03349879
- Where
- South Korea
- Volunteers
- 28,551 people, healthy volunteers welcome
- Sponsor
- Yonsei University
Vitamin D Deficiency, Parkinson Disease
12 Weeks Vitamin D Supplementation and Physical Activity in PD Patients With DBS
Parkinson's disease (PD) is the second most frequently appearing neurodegenerative disease. It is a progressive disease of the central nervous system (CNS) and affects around 1% of people over 60 years old.
- Trial name
- NCT04768023
- Testing
- Juvit D3
- Where
- Poland
- Volunteers
- 50 people
- Sponsor
- Medical University of Gdansk
Cardiovascular Disease
Does Deficiency in Vitamin D Induced Hypercoagulation or Thrombin Generation
Working hypothesis and aims: The aim of our study is to investigate whether vitamin D deficiency could cause increased thrombin generation and a hypercoagulable state healthy volunteers.
- Trial name
- NCT01761669
- Testing
- Vitamin D
- Where
- Israel
- Volunteers
- 400 people, healthy volunteers welcome
- Sponsor
- HaEmek Medical Center, Israel
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
Osteomalacia
Ga-DOTATATE PET for Phosphaturic Mesenchymal Tumors in Patients With Tumor Induced Osteomalacia
The researchers are trying to evaluate a newer imaging technique (Ga-DOTATATE PET/CT) to see if it is more sensitive to localize the source of the hormone, which has caused the low phosphate levels.
- Trial name
- NCT03736564
- Testing
- 68Ga-DOTATATE PET/CT
- Where
- United States
- Volunteers
- 18 people
- Sponsor
- Mayo Clinic