Clinical trials: Vitamin D
Vitamin D Deficiency, 25-Hydroxyvitamin D Concentration
Is Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena?
Several studies have demonstrated that D2 treatment is associated with a decrease in 25(OH)D3 level and therefore have proposed that D3 would be preferable in term of raising total 25(OH)D level.
- Trial name
- NCT03035084
- Testing
- Vitamin D3, Vitamin D2
- Where
- Saudi Arabia
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- King Faisal Specialist Hospital & Research Center
All IVF Patients
The Impact of In-Vitro Fertilization (IVF) ON Vitamin D
The main objective of this study is to determine what is the vitamin D status in Israeli women undergo ART. We want to evaluate the influence of hyper Vitamin D level and low vitamin D level on IVF -ICSI cycles.
- Trial name
- NCT01945658
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Hillel Yaffe Medical Center
Asthma
Vitamin D Supplementation During Pregnancy for Prevention of Asthma in Childhood
The aim of this study is to prevent asthma symptoms (recurrent wheeze) in childhood by supplementation with high dose vitamin D to the mother during pregnancy.
- Trial name
- ABCvitaminD (NCT00856947)
- Testing
- Cholecalciferol D3
- Where
- 2 sites in Denmark
- Volunteers
- 600 people, healthy volunteers welcome
- Sponsor
- Copenhagen Studies on Asthma in Childhood
Sarcopenia
Sarcopenia in Patients With Heart Failure
Sarcopenia is a frequent complication in patients with cancer and chronic diseases, it is characterized by decreased muscle strength and fatigue due to reduced skeletal muscle mass, which is accompanied by atrophy and decreased…
- Trial name
- NCT06634316
- Testing
- Mediterranean diet, Hypercaloric, hyperproteic oral nutritional supplement, Protein module
- Where
- Spain
- Volunteers
- 60 people
- Sponsor
- Maimónides Biomedical Research Institute of Córdoba
Acne
Effects of Roaccutane on Ca, P, PTH and Vitamin D Metabolites in the Treatment of Sever Acne
serum levels Ca, P, PTH and vitamin D metabolites before and after treatment with isotretinoin for sever acne
- Trial name
- NCT00416585
- Testing
- isotretinoin (Roaccutane)
- Where
- Iran
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Shahid Beheshti University of Medical Sciences
Obesity
Effect of Vitamin D Supplementation on Inflammation and Cardiometabolic Risk Factors in Obese Adolescents
Large studies of children show that over half of the children in the United States of America do not have enough vitamin D stored in their bodies.
- Trial name
- NCT01217840
- Testing
- Drisdol (Ergocalciferol) Vitamin D2
- Where
- United States
- Volunteers
- 40 people
- Sponsor
- Stanford University
Type 2 Diabetes
Vitamin D Supplementation to Patients With Type 2 Diabetes
The purpose of the study is to evaluate if supplementation with vitamin D in a dose of 40.000 IU per week will result in improved metabolic control in patients with type 2 diabetes.
- Trial name
- NCT00400491
- Testing
- Cholecalciferol (vitamin D)
- Where
- Norway
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- University of Tromso
Respiratory Tract Infections, Influenza
Trial of Vitamin D Supplementation for the Prevention of Influenza and Other Respiratory Infections (ViDiFlu)
Purpose: The study null hypothesis is that vitamin D supplementation will not influence time to acute respiratory tract infection in sheltered accommodation residents.
- Trial name
- ViDiFlu (NCT01069874)
- Testing
- Cholecalciferol (Vitamin D/Vigantol oil), Miglyol oil
- Where
- 2 sites in United Kingdom
- Volunteers
- 240 people, healthy volunteers welcome
- Sponsor
- Barts & The London NHS Trust
Pulmonary Hypertension
Prognostic Value of Vitamin D and Intact Parathyroid Hormone (iPTH) in Pulmonary Hypertension
The aim of this observational study is to analyse the prognostic value of 25(OH)-vitamin D, iPTH and other serum biomarkers in patients with pulmonary hypertension.
- Trial name
- NBHAP (NCT06872710)
- Volunteers
- 345 people, healthy volunteers welcome
- Sponsor
- Universidad Complutense de Madrid
Cystic Fibrosis, Dysbiosis
Vitamin D and Prebiotics for Intestinal Health in Cystic Fibrosis
The study will assess if administration of high-dose vitamin D and a commonly used prebiotic (inulin) is effective to reduce gastrointestinal dysbiosis and to improve critical intestinal functions in Cystic Fibrosis with the…
- Trial name
- NCT04118010
- Testing
- Vitamin D3, Inulin
- Where
- United States
- Volunteers
- 40 people
- Sponsor
- Emory University
Osteoporosis, Cognitive Decline
Vitamin B12 and Folic Acid Supplementation for Preventing Fractures in Elderly People
It is hypothesized that vitamin B12 and folic acid supplementation reduces the number of incident fractures. The proposed study, a randomized placebo-controlled intervention trial, compares daily supplementation with folic acid…
- Trial name
- B-PROOF (NCT00696514)
- Testing
- Vitamin B12, folic acid, Vitamin D3
- Where
- 3 sites in Netherlands
- Volunteers
- 3,000 people, healthy volunteers welcome
- Sponsor
- Wageningen University
Osteoporosis
Nutrition Education to Promote Calcium Intake Among 30-65 Year-old Women in Vietnam
Osteoporosis is an important public health problem in Vietnam, with one in ten Vietnamese women suffering from it. There is enough evidence demonstrating that low calcium intake is one of the risk factors for osteoporosis among…
- Trial name
- NCT04196426
- Testing
- Nutrition education intervention about osteoporosis and calcium
- Where
- Vietnam
- Volunteers
- 250 people, healthy volunteers welcome
- Sponsor
- Texas Tech University
Depression, Depressive Symptoms
VITAL-DEP: Depression Endpoint Prevention in the VITamin D and OmegA-3 TriaL
The VITamin D and OmegA-3 TriaL (VITAL; NCT 01169259) is an ongoing randomized clinical trial in 25,871 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or omega-3 fatty acids…
- Conditions
- Depression, Depressive Symptoms, Mood
- Trial name
- VITAL-DEP (NCT01696435)
- Testing
- vitamin D3, omega-3 fatty acids (fish oil)
- Where
- United States
- Volunteers
- 18,353 people, healthy volunteers welcome
- Sponsor
- Brigham and Women's Hospital
Hip Arthropathy, Knee Arthropathy
Effect of Vitamin D Status and Repletion on Postoperative Total Joint Arthroplasty Complications
Vitamin D status has been shown to have an effect on post-operative outcomes in total joint arthroplasty. The goal of this study is to determine if pre-operative supplementation and correction of Vitamin D deficiency can reduce…
- Conditions
- Hip Arthropathy, Knee Arthropathy, Vitamin D Deficiency
- Trial name
- NCT04229368
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 900 people
- Sponsor
- Brigham and Women's Hospital
Periodontitis, Gingivitis
Regulatory T Cell With Related Interleukins in Periodontal Disease Progression
T Regulatory cells which suppressor subset of T cells and related cytokines remain in blood and infiltrates into the tissue under need.
- Trial name
- NCT06135116
- Testing
- Flow Cytometric Detection of Regulatory T Cells and Cytokines analysis by ELISA
- Where
- Egypt
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Al-Azhar University
Diabetes Mellitus - Type 1, Diabetes Mellitus - Type 2
Diabetes Visual Function Supplement Study
This study will evaluate the effects of a novel multi-component dietary supplement on the visual function and retinal structure of patients with diabetes with both no diabetic retinopathy and mild to moderate diabetic…
- Conditions
- Diabetes Mellitus - Type 1, Diabetes Mellitus - Type 2, Non-proliferative Diabetic Retinopathy
- Trial name
- DiVFuSS (NCT01646047)
- Testing
- multi-component nutritional supplement capsules, multi-component dietary supplement
- Where
- United States
- Volunteers
- 70 people
- Sponsor
- ZeaVision, LLC
Chronic Kidney Disease, Secondary Hyperparathyroidism
Safety/Efficacy Study of CTAP101 in Chronic Kidney Disease Subjects With Secondary Hyperparathyroidism (SHPT)
This study will investigate how the levels of a repeat dose of CTAP101 changes in the body over time (pharmacokinetics, PK) and how CTAP101 affects other mineral and hormonal balances (pharmacodynamics, PD) in patients with…
- Conditions
- Chronic Kidney Disease, Secondary Hyperparathyroidism, Vitamin D Insufficiency
- Trial name
- NCT01219855
- Testing
- Cohort 1 CTAP101 Capsules- 60µg, Cohort 1 CTAP101 Capsules - 90µg, Cohort 1 Matching Sugar Capsule
- Where
- United States
- Volunteers
- 78 people
- Sponsor
- OPKO Health, Inc.
Chronic Pain Following Thermal Burn Injury
Vitamin D and n-3 Polyunsaturated Fatty Acids (PUFAs) to Prevent Chronic Pain Following Major Thermal Burn Injury
The goal of this study is to develop a safe, effective, and readily available treatment that will prevent chronic pain following Major Thermal Burn Injury (MThBI).
- Trial name
- NCT03313076
- Testing
- Omega-3 fatty acids (fish oil), Vitamin D3 (cholecalciferol)
- Where
- United States
- Volunteers
- 24 people
- Sponsor
- University of North Carolina, Chapel Hill
Advanced Epithelial Ovarian Cancer
Effect of Early Enteral Nutrition on Postoperative Recovery of Ovarian Cancer Patients
This is a single-center, unblinded, prospective observational study, and the objective is to compare the effects of enteral nutrition via nasojejunal tube and parenteral nutrition via vein on patients' early recovery and…
- Trial name
- NCT06236958
- Testing
- Transnasal jejunal tube, Transvenous access
- Where
- China
- Volunteers
- 200 people
- Sponsor
- Luo Chengyan
Old Age; Atrophy
The Effect of a Combined Personalized Nutritional Intervention and a Personalized Graded Activity Functional Training Program on Physical Performance in Hospitalized Older Patients, Compared to Usual Care
This project aims to improve physical performance in older patients, by offering a personalized combined nutritional intervention with a physical activity training program.
- Trial name
- FITFOOD (NCT05413616)
- Testing
- FITFOOD lifestyle intervention
- Where
- Netherlands
- Volunteers
- 136 people
- Sponsor
- Radboud University Medical Center
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