Clinical trials: Deficiency, Vitamin D
Irritable Bowel Syndrome, Vitamin D Deficiency
Vitamin D Supplementation in IBS
Irritable bowel syndrome (IBS) is a very common functional gastrointestinal disorder affecting nearly 20% of the North American population.
- Conditions
- Irritable Bowel Syndrome, Vitamin D Deficiency, Abdominal Pain
- Trial name
- NCT03148288
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 7 people
- Sponsor
- Beth Israel Deaconess Medical Center
HIV Disease, Vitamin D Deficiency
Vitamin D Supplementation in HIV-infected Youth
Along with its effects on bone metabolism, vitamin D is an important modulator of the immune system. Experimental studies have shown that the active metabolite of vitamin D [1,25(OH)2D] is able to skew the T cell compartment into…
- Conditions
- HIV Disease, Vitamin D Deficiency, Hypovitaminosis D, Hyperparathyroidism
- Trial name
- NCT01656070
- Testing
- oral cholecalciferol 1000000 UI (vitamin D3)
- Where
- Italy
- Volunteers
- 50 people
- Sponsor
- University of Milan
Spinal Anesthesia-induced Hypotension, Vitamin D Deficiency
Effect of Vitamin D Deficiency on the Frequency and Severity of Spinal Anesthesia-Induced Hypotension in Pregnant Women Undergoing Cesarean Section
Spinal anesthesia-induced hypotension remains a common and significant complication during cesarean sections, posing risks for both mother and fetus.
- Conditions
- Spinal Anesthesia-induced Hypotension, Vitamin D Deficiency, Cesarean Section
- Trial name
- NCT07057362
- Testing
- Intraoperative Hemodynamic Monitoring
- Where
- Turkey (Türkiye)
- Volunteers
- 177 people
- Sponsor
- Duzce University
Vitamin Deficiency
Effect of Vitamin D Supplementation on Muscular Strength, Musculoskeletal Pain and Headache
The primary aim of the present trial is to study the effect of daily vitamin D supplementation on muscular power and force among non-western immigrants living in Oslo, Norway, and secondarily to study the effect of…
- Trial name
- NCT01263288
- Testing
- cholecalciferol
- Where
- Norway
- Volunteers
- 251 people, healthy volunteers welcome
- Sponsor
- Per Lagerlov
Vitamin d Deficiency
The Effect of UV-C Enriched Foods on Vitamin D Deficiency
This study is an experimental design study in which demographic characteristics, food consumption, biochemical parameters and anthropometric measurements of individuals with low vitamin D levels before and after consuming…
- Trial name
- NCT06098820
- Testing
- Vitamin D status
- Where
- Turkey (Türkiye)
- Volunteers
- 48 people, healthy volunteers welcome
- Sponsor
- Okan University
Hypophosphatemia, Familial, Rickets
Hypophosphatemic Rickets in Norway
The purpose of the study is to do a follow-up survey of all individuals with hereditary hypophosphatemia in Norway, focusing on manifestations in childhood and adolescence.
- Conditions
- Hypophosphatemia, Familial, Rickets, Hyperphosphatemia
- Trial name
- NCT01057186
- Testing
- Alfacalcidol; phosphate., Sevelamer
- Where
- Norway
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Haukeland University Hospital
Hypovitaminosis D, Insulin Resistance
Hypovitaminosis D : A Link Between Bone/Mineral and Fat/Fuel Metabolism
The optimal dose of vitamin D needed to optimize beneficial effects on musculoskeletal outcomes remains to be defined. Equally unclear is the impact of vitamin D on fuel metabolism and insulin sensitivity in human subjects.
- Conditions
- Hypovitaminosis D, Insulin Resistance, Obesity, Osteoporosis
- Trial name
- GEHF-VitD (NCT01315366)
- Testing
- Euro D and Ci-CalD, Euro D, Ci-CalD
- Where
- Lebanon
- Volunteers
- 257 people, healthy volunteers welcome
- Sponsor
- American University of Beirut Medical Center
Chronic Kidney Disease Mineral and Bone Disorder, Chronic Kidney Disease (CKD)
The CPH-MBD Cohort
Persons with chronic kidney disease (CKD) have a 3-fold increased risk of bone fracture and a 10-fold increased risk of cardiovascular disease than the general population.
- Conditions
- Chronic Kidney Disease Mineral and Bone Disorder, Chronic Kidney Disease (CKD), Bone Markers
- Trial name
- NCT07193056
- Where
- Denmark
- Volunteers
- 1,000 people
- Sponsor
- Herlev Hospital
Vitamin D Deficiency, Osseointegration Failure of Dental Implant
Vitamin-D Insufficiency and Implants
Vitamin D is important for bone health, immune function, and inflammation, along with dental implant success. The study aimed to assess bone markers and cytokine levels in patients with and without vitamin D insufficiency to…
- Conditions
- Vitamin D Deficiency, Osseointegration Failure of Dental Implant, Peri-Implantitis
- Trial name
- NCT06452251
- Testing
- OPG, OC, RANKL, IL-10, IL-1β, Ca, TNF-α and Caspase-1 ELISA, Resonance Frequency Analysis, Periodontal clinical examination
- Where
- Turkey (Türkiye)
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- Vesile Elif Toy
Secondary Hyperparathyroidism Due to Renal Causes, Chronic Kidney Diseases
Safety, Efficacy, PK and PD of CTAP101 (Calcifediol) ER Capsules for SHPT in HD Patients VDI
Safety, Efficacy, PK and PD of CTAP101 (calcifediol) ER Capsules for SHPT in HD Patients VDI
- Conditions
- Secondary Hyperparathyroidism Due to Renal Causes, Chronic Kidney Diseases, Vitamin D Deficiency, Stage 5 Chronic Kidney Disease
- Trial name
- NCT03602261
- Testing
- Calcifediol Oral Capsule
- Where
- 18 sites in United States
- Volunteers
- 44 people
- Sponsor
- OPKO Health, Inc.
Vitamin D Deficiency
Inter-relationship Between Vitamin D Requirements and Calcium Intake in Older Adults
This winter-based placebo-controlled, single-dose vitamin D randomized controlled trial (RCT) aims to examine the impact of various levels of habitual calcium intake on dietary vitamin D requirements in older adults stratified by…
- Trial name
- VitD-Ca (NCT01990872)
- Testing
- Vitamin D3 (20 micrograms/day)
- Where
- Ireland
- Volunteers
- 125 people, healthy volunteers welcome
- Sponsor
- University College Cork
Vitamin D Deficiency
Hip Arthroplasty and Vitamin D Status
It is essential that serum 25(OH)D changes following surgery be clarified, and the mechanism(s) underpinning these changes be identified.
- Trial name
- NCT02295228
- Testing
- No intervention
- Volunteers
- 43 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Vitamin D Deficiency
Empirical Comperative Study Of Variation Blood Level Antibody Vitamin D at Different Groups Of Patients Compared Healthy Peoples
The aim of this study is to detect antibodies to vitamin D in the serum at Different Groups of patients and healthy volunteer. A second goal is to find the relation between Vitamin D Antibody and Vitamin D level.
- Trial name
- NCT02795234
- Testing
- Blood samples
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- Meir Medical Center
Vitamin D Deficiency
Vitamin D Supplementation in Overweight/Obese African American Adults and Youth (D-SUNNY)
Primary Specific Aim 1: To compare the dose-responsive effects of vitamin D3 supplementations on 25(OH) D, parathyroid hormone (PTH), and serum/urine calcium.
- Trial name
- D-SUNNY (NCT01583621)
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 74 people, healthy volunteers welcome
- Sponsor
- Augusta University
Pituitary ACTH Hypersecretion, Acromegaly
Vitamin D Metabolism in Patients With Endocrine Disorders
This prospective controlled interventional study aims to reveal the diversity of vitamin D metabolism in patients with certain endocrine disorders (Cushing's disease, acromegaly, primary hyperparathyroidism, diabetes mellitus…
- Conditions
- Pituitary ACTH Hypersecretion, Acromegaly, Diabetes Mellitus, Type 1, Primary Hyperparathyroidism
- Trial name
- NCT04844164
- Testing
- Cholecalciferol 15000 UNT/ML Oral Solution
- Where
- Russia
- Volunteers
- 261 people, healthy volunteers welcome
- Sponsor
- Endocrinology Research Centre, Moscow
Bariatric Surgery Candidate, Obesity, Morbid
Effect Of Laparoscopic Sleeve Gastrectomy on Vitamin D, Parathormone and Calcium Levels
Obesity is likely to be the disease of the 21th century. The growth of obesity is worldwide, a pandemic, and has increased globally in the last 30 years.
- Conditions
- Bariatric Surgery Candidate, Obesity, Morbid, Vitamin D Deficiency, Calcium Deficiency
- Trial name
- NCT05430932
- Testing
- Laparoscopic sleeve gastrectomy
- Where
- Egypt
- Volunteers
- 40 people
- Sponsor
- Kafrelsheikh University
Type 1 Diabetes, Vitamin D Deficiency/Insufficiency
The Effects of Vitamin D on Glycemic Control and Proinflammatory Markers in Adolescents With T1DM
The investigators are conducting a prospective cross-over study to evaluate the effects of vitamin D supplementation on diabetes control and the pro-inflammatory markers involved in microvascular complications in adolescents with…
- Trial name
- NCT01697228
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 26 people
- Sponsor
- Children's Hospital Los Angeles
Obesity, Vitamin D Deficiency
Efficacy Of Ergocalciferol In Adults According To BMI
Vitamin D insufficiency is an increasing trend in the United States. According to the NHANES data collection there was a near doubling of patients with vitamin D deficiency in 10 years.
- Trial name
- NCT02435771
- Testing
- Ergocalciferols
- Where
- United States
- Volunteers
- 44 people, healthy volunteers welcome
- Sponsor
- Walter Reed National Military Medical Center
Vitamin D Deficiency, Osteoporosis
Change in Free 25(OH)D After High Dose in Vitamin D Deficient Postmenopausal Women
Total 25(OH)D is currently used as a biomarker of vitamin D status. However, there is some debate as to whether total 25(OH)D is the best marker to use.
- Trial name
- NCT02553044
- Testing
- Cholecalciferol (Vitamin D3)
- Where
- United Kingdom
- Volunteers
- 112 people, healthy volunteers welcome
- Sponsor
- Sheffield Teaching Hospitals NHS Foundation Trust
Vitamin D Deficiency
Serum and Semen Vitamin D Level With Semen Parameters
vitamin D may have multiple functions, one of them is modulating reproductive processes and the reproductive role of vitamin D is highlighted by expression of the vitamin D receptors in testis, male reproductive tract and sperms
- Trial name
- NCT03477136
- Testing
- ELISA to evaluate serum and seminal vitamin D level
- Where
- Egypt
- Volunteers
- 150 people
- Sponsor
- Assiut University
The first 1,020 results can be paged through. Add a filter or change the sort order to reach the rest.