Clinical trials: Vitamin D Deficiency, completed
Vitamin D Deficiency
Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3
Vitamin D is a commonly available essential prohormone humans need to regulate blood calcium and has recently emerged as potentially helpful in combating severe COVID-19.
- Trial name
- ViDAS (NCT04885803)
- Testing
- Softgel Vitamin D3, Nano Liquid Vitamin D3, 25(OH)D Blood Serum Test
- Where
- United States
- Volunteers
- 114 people, healthy volunteers welcome
- Sponsor
- Inspired Life Medical, Inc.
Peritoneal Dialysis-associated Peritonitis, Vitamin D Deficiency
The Effects of Oral Vitamin D Supplementation on the Prevention of Peritoneal Dialysis-related Peritonitis
This is a pilot randomized, controlled trial of Vitamin D supplementation in patients on peritoneal dialysis to determine the feasibility of a future full-scale RCT exploring if oral administration of vitamin D3 could reduce the…
- Trial name
- NCT03264625
- Testing
- Cholecalciferol (2000iu qd), Routine therapy for PD
- Where
- China
- Volunteers
- 60 people
- Sponsor
- Peking University First Hospital
Vitamin D Deficiency
Reference Interval of Vitamin D of Coastal Fishermen in Cox's Bazar District of Bangladesh
Lack of adequate sun exposure due to urbanization is prone to hypovitaminosis D. Vitamin D (25-hydroxyvitamin D) deficiency is now a major health concern in the western world.
- Trial name
- NCT04986319
- Testing
- Serum vitamin D assay
- Where
- 2 sites in Bangladesh
- Volunteers
- 556 people, healthy volunteers welcome
- Sponsor
- Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders
Polycystic Ovarian Syndrome, Vitamin D Deficiency
Health Benefits of Vitamin D and Calcium in Women With PCOS (Polycystic Ovarian Syndrome)
The investigators conducted a prospective un-blinded pilot study of Vitamin D plus Calcium (Ca) supplementation in overweight (BMI > 27) premenopausal women diagnosed with Polycystic Ovarian Syndrome (PCOS), as defined by the…
- Trial name
- NCT00743574
- Testing
- Vitamin D2 (Ergocalciferol), Medroxyprogesterone (Provera), Vitamin D3 (Cholecalciferol)
- Where
- United States
- Volunteers
- 36 people
- Sponsor
- Yale University
Hypovitaminosis D
Rapid Normalization of Vitamin D in Critically Ill Children: A Phase II Dose Evaluation Randomized Controlled Trial
Documented roles for vitamin D in calcium homeostasis, cardiovascular and respiratory health, inflammation, innate immunity, and neuromuscular function have led to the hypothesis that deficiency might represent a modifiable risk…
- Trial name
- VITdAL-PICU (NCT02452762)
- Testing
- Vitamin D3
- Where
- 4 sites in Austria, Canada and 1 more
- Volunteers
- 67 people
- Sponsor
- Children's Hospital of Eastern Ontario
Sjogren's Syndrome, Vitamin D Deficiency
Corneal Nerve Structure in Sjogren's
Patients who are suspected of or diagnosed with Sjogren's disease will be evaluated for ocular symptoms and corneal nerve morphology.
- Trial name
- NCT03203382
- Where
- United States
- Volunteers
- 100 people
- Sponsor
- University of Pennsylvania
Bariatric Surgery Candidate, Vitamin Deficiency
Absorption of Transdermal Vitamins in Post Bariatric Surgery Patients
Patients undergoing bariatric surgery often develop new vitamin and/or mineral deficiencies or exacerbate prior deficiencies after surgery.
- Conditions
- Bariatric Surgery Candidate, Vitamin Deficiency, Mineral Deficiency
- Trial name
- NCT03360435
- Testing
- Patch MD MultiVitamin Plus patch
- Where
- United States
- Volunteers
- 99 people, healthy volunteers welcome
- Sponsor
- University of Florida
Chronic Kidney Diseases, Deficiency, Vitamin D
Drug Metabolizing Enzyme and Transporter Function in Chronic Kidney Disease
This study investigates the effect of vitamin D deficiency on drug metabolism and transport in patients with chronic kidney disease (CKD) and in healthy controls.
- Trial name
- NCT02360644
- Testing
- Cholecalciferol
- Where
- 2 sites in United States
- Volunteers
- 23 people, healthy volunteers welcome
- Sponsor
- University of Colorado, Denver
Vitamin D Deficiency, Covid19
The Relationship Between Vitamin D Levels, Inflammatory Parameters and Disease Severity of COVID-19 Infection
Vitamin D deficiency increases the susceptibility to respiratory virus infections and the severity of infections. Inflammation plays a key role in pathogenesis in COVID19 while identifying clinical course and prognosis…
- Trial name
- NCT04945577
- Testing
- Inflammatory Parameters, 25 OH Vitamin D Level
- Where
- Turkey (Türkiye)
- Volunteers
- 300 people
- Sponsor
- Fatih Sultan Mehmet Training and Research Hospital
Vitamin D Deficiency
Challenges in Achieving Adequate Vitamin D Status in the Adult Population/ Part 2
The efficiency of different vitamin D formulations in treating suboptimal vitamin D status in adult population will be determined. It will provide insights into the influence of formulation on vitamin D absorption.
- Trial name
- VITAD/2 (NCT03810261)
- Testing
- Oil-based vitamin D, Water-based vitamin D, Vitamin D capsules
- Where
- Slovenia
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- Institute of Nutrition, Slovenia (Nutris)
Dietary Supplements, Intensive Care Unit
Vitamin D Supplementation in Intensive Care Unit Patients
A randomized controlled trial is designed to investigate the safety and clinical efficacy of a mega dose of VD in patients admitted in intensive care unit (ICU).
- Conditions
- Dietary Supplements, Intensive Care Unit, Vitamin D Deficiency, Vitamin D Toxicity
- Trial name
- NCT04915963
- Testing
- Vitamin D supplementation
- Volunteers
- 340 people
- Sponsor
- Association Tunisienne d'Etude & de Recherche sur l'Athérosclérose
Vitamin D Deficiency, Postoperative Pain
Vitamin D Levels and Postoperative Pain in Laparoscopic Cholecystectomy
The deficiency of vitamin D is common in patients with gastrointestinal system disorders. Vitamin D has been associated with chronic non-specific musculoskeletal pain and migraines due to anti-inflammatory effects.
- Trial name
- NCT04687527
- Where
- Turkey (Türkiye)
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Bozok University
Vitamin D Deficiency
Vitamin D Enriched Meat Project (Acute Study)
The importance of achieving an adequate vitamin D status is widely recognised, with public health and research communities heightening their interest over recent years.
- Trial name
- NCT04207294
- Testing
- Pork arm, Chicken arm
- Where
- United Kingdom
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- University of Ulster
Implant Stability With Vitamin D Deficiency
Stability of Dental Implants Placed in Patients With Vitamin D Deficiency Using Sequential Drilling Versus a New One Single Drilling Design
Vitamin D considers as the most potent effect on calcium level in blood it was found that vitamin D target mainly bone tissue intestine and kidney for calcium absorption In bone, vitamin D stimulates mainly the activity of…
- Trial name
- NCT03695562
- Testing
- sequential drilling technique
- Where
- Egypt
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Cairo University
Pediatric Disorder, Vitamin D Deficiency
Retinal Changes in Vitamin D Deficiency
Retinal tissue parameters of pediatric patients with vitamin D deficiency will be evaluated in this prospective case-control study. The patients will be divided into 2 groups according to the vitamin D level.
- Conditions
- Pediatric Disorder, Vitamin D Deficiency, Retinal Disease, Choroidal Disease
- Trial name
- VDD (NCT04891211)
- Testing
- Vitamin D deficiency
- Where
- Turkey (Türkiye)
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Adiyaman University
Vitamin C Deficiency
The Effect of Liposome Vitamin C on the Absorption and Metabolism of the Human Body.
To evaluate the difference between vitamin C in the form of oral liposomes and general vitamin C in a fixed period of time in plasma and urine.
- Trial name
- NCT04886752
- Testing
- vitamin C without liposome, liposomal process A vitamin C, liposomal process B vitamin C (Double Nutri™)
- Where
- Taiwan
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- TCI Co., Ltd.
Vitamin D3 Deficiency
Vitamin D as a Factor Modifying Adaptation to Exercise
Physical activity is a recommended, indispensable element of a healthy lifestyle as well as a countermeasure against many diseases often accompanied by the acute or chronic low grade inflammation.
- Trial name
- NCT03417700
- Testing
- NW training, HICT
- Where
- 2 sites in Poland
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Gdansk University of Physical Education and Sport
COVID-19, Vitamin D Deficiency
Investigating the Role of Vitamin D in the Morbidity of COVID-19 Patients
The 2019 novel coronavirus disease (COVID-2019) pandemic is an enormous health issue of worldwide scale. Prevention and/or treatment with a widely-available and already-licensed product such as vitamin D (cholecalciferol) could…
- Trial name
- NCT04386044
- Where
- United Kingdom
- Volunteers
- 986 people
- Sponsor
- Tameside General Hospital
Vitamin D Deficiency
Effects of Vitamin D3 Versus 25OHD3 on Mineral Metabolism and Immune Function
The purpose of this study is to compare the effects of two different forms of vitamin D supplements (vitamin D3 and 25-hyrdroxyvitamin D3 [25(OH)D3]) on vitamin D levels in the blood, and on markers of skeletal and immune health.
- Trial name
- NCT02091219
- Testing
- Vitamin D, 25(OH)D3
- Where
- 2 sites in United States
- Volunteers
- 35 people
- Sponsor
- University of California, Los Angeles
Overweight and Obesity, Vitamin A Deficiency
Individualized Dietary Intervention in Breastfeeding Women: Body Weight and Vitamin A Stores
Breast milk is the best food during the first 6mo of life because it offers multiple benefits for the mother-infant pair. An inadequate maternal diet during pregnancy can lead to excess weight gain, leading to negative health…
- Conditions
- Overweight and Obesity, Vitamin A Deficiency, Dietary Modification, Breastfeeding
- Trial name
- NCT03640104
- Testing
- Intervention-Nutrition guidelines, Nutrition guidelines
- Where
- Mexico
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Universidad de Sonora