Clinical trials: Hypovitaminosis
Respiratory Tract Infections, Asthma
DO IT Trial: Vitamin D Outcomes and Interventions In Toddlers
Vitamin D can be made in the skin by exposure to sunlight and can be found in certain foods. Vitamin D levels are alarmingly low in many North American children. Several health issues have been linked with low vitamin D.
- Conditions
- Respiratory Tract Infections, Asthma, Avitaminosis
- Trial name
- DO IT (NCT01419262)
- Testing
- Vitamin D - Cholecalciferol 400 IU, Vitamin D3 - Cholecalciferol 2000 IU
- Where
- 2 sites in Canada
- Volunteers
- 703 people, healthy volunteers welcome
- Sponsor
- The Hospital for Sick Children
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.
X-linked Hypophosphatemia
X-linked Hypophosphatemia and FGF21
Fibroblast Growth Factor 23 and Fibroblast Growth Factor 21 are two endocrine Fibroblast Growth Factors, requiring Klotho as a co-factor to promote their systemic actions.
- Trial name
- XLH 21 (NCT03596554)
- Testing
- Descriptive study
- Where
- 3 sites in France
- Volunteers
- 39 people
- Sponsor
- Hospices Civils de Lyon
Vitamin B 12 Deficiency, Pregnancy
Diet Quality of Pregnant Women With a Strict Plant-based Diet Versus an Omnivorous Diet
The goal of this observational study is to compare the nutritional intake among pregnant women with a strict plant-based diet versus an omnivorous diet. The main aim is to compare vitamin B12 intake.
- Conditions
- Vitamin B 12 Deficiency, Pregnancy, Nutrient Deficiency, Dietary Exposure
- Trial name
- NCT06046703
- Testing
- Daily nutritional intake
- Volunteers
- 256 people
- Sponsor
- Maastricht University Medical Center
Sarcopenia, Chronic Kidney Diseases
Sarcopenia, Fall and Osteoporosis in Chronic Kidney Disease
This study is a cross-sectional study that wishes to investigate whether there is an increased incidence of sarcopenia in patients with chronic kidney disease compared to the Danish background population.
- Conditions
- Sarcopenia, Chronic Kidney Diseases, Osteoporosis
- Trial name
- NCT04515342
- Testing
- DXA, Muscle strength and function assessment, Blood samples
- Where
- 2 sites in Denmark
- Volunteers
- 140 people
- Sponsor
- Herlev Hospital
Vitamin D Deficiency
Vitamin D and Mortality: an Individual Participant Data Meta-analysis of Standardized 25-hydroxyvitamin D
Vitamin D deficiency is a risk factor for mortality but existing data are limited by missing standardization of laboratory methods for 25-hydroxyvitamin D (25[OH]D).
- Trial name
- NCT02438488
- Where
- Austria
- Volunteers
- 26,916 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Thiamine Deficiency
Further Development and Assessment of Tools to Measure Risk Factors for and Treatment of Thiamine Deficiency Disorders
Thiamine deficiency, including the most severe form infantile beriberi, is a public health concern across South and Southeast Asia, where monotonous diets rely on thiamine-poor white rice.
- Trial name
- NCT05390086
- Testing
- Standard of care
- Where
- 2 sites in Laos
- Volunteers
- 42 people
- Sponsor
- University of California, Davis
Crohn's Disease, Vitamin D Deficiency
Vitamin D Supplementation as Non-toxic Immunomodulation in Children With Crohn's Disease
IBD is caused by an abnormal immune response to the gut bacteria in people who are genetically predisposed. There has been a huge increase in the number of people diagnosed with IBD since World War II, likely due to changes in…
- Trial name
- NCT01046773
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 3 people
- Sponsor
- University of California, Los Angeles
HIV Infections
Vitamin D Supplementation in HIV Youth
The purpose of this study is to determine the correct dose of Vitamin D to give to prevent HIV related complications.
- Trial name
- NCT01523496
- Testing
- Vitamin D control dose, Vitamin D supplementation-
- Where
- 2 sites in United States
- Volunteers
- 190 people, healthy volunteers welcome
- Sponsor
- University Hospitals Cleveland Medical Center
Cardiovascular Diseases, Peripheral Vascular Diseases
Homocysteine and Progression of Atherosclerosis
In the first phase, to establish the relationship of progression of peripheral vascular disease (PVD) to plasma homocysteine. In the second phase, to conduct a randomized, controlled trial of folic acid treatment of plasma…
- Conditions
- Cardiovascular Diseases, Peripheral Vascular Diseases, Atherosclerosis, Cerebrovascular Disorders
- Trial name
- NCT00005338
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Vitamin C Deficiency, Smoking
The Effect of Vitamin C on Wound Healing In Mandibular Fracture Patients
The goal of this study is to perform a randomized clinical trial to assess the effects of vitamin C versus placebo on wound healing in mandibular fracture patients.
- Conditions
- Vitamin C Deficiency, Smoking, Surgery, Surgery--Complications
- Trial name
- NCT03938584
- Testing
- Vitamin C
- Where
- United States
- Volunteers
- 45 people
- Sponsor
- Hennepin Healthcare Research Institute
Vitamin D Deficiency
The Effects of Vitamin D3 Alone and in a Combination With Omega-3 on the Association of C-peptide With Glycemic Control
The Effects of Vitamin D3 alone and in a combination with omega-3 on the association of C-peptide with glycemic control
- Trial name
- NCT04307784
- Testing
- VD3, Omega-3FA, VD3 and Omega-3FA
- Where
- Jordan
- Volunteers
- 115 people, healthy volunteers welcome
- Sponsor
- Applied Science Private University
Chronic Kidney Diseases, Hypertension
Integrated Diagnosis and Treatment of CKD on Outcomes
Objective: To establish a study cohort and follow up of patients with CKD in our hospital, and evaluate the status of integrated CKD diagnosis and treatment according to guidelines in the real world, as well as the clinical…
- Conditions
- Chronic Kidney Diseases, Hypertension, Hyperglycemia, Hyperlipidemias
- Trial name
- NCT05242055
- Testing
- Integrated diagnosis and treatment for CKD
- Where
- China
- Volunteers
- 1,000 people
- Sponsor
- Capital Medical University
Vitamin D Deficiency
Prevalence of Early Childhood Caries in Egyptian Children With Serum Vitamin D Deficiency.
To detect the effect of vitamin D deficiency in the development of early childhood caries (ECC) among Egyptian children.
- Trial name
- NCT03158155
- Volunteers
- 288 people, healthy volunteers welcome
- Sponsor
- Nancy Ahmed El Salmawy
Mental Wellbeing, Depression, Anxiety
Effects of Vitamin D on the Behaviours, Mental, and Physical Health of Prisoners
This study aims to understand how vitamin D (VD) affects human health. Typically, prisoners are low on vitamin D, as it is difficult to receive through diet, and is mostly obtained via exposure to the sun.
- Conditions
- Mental Wellbeing, Depression, Anxiety, Bone Density, Low, Vitamin D Deficiency
- Trial name
- NCT05724316
- Testing
- Vitamin D supplement
- Where
- United Kingdom
- Volunteers
- 110 people, healthy volunteers welcome
- Sponsor
- Oxford Brookes University
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
Gynaecological Disease, Vitamin D Deficiency
Association Between Vitamin D and the Risk of Uterine Fibroids
The aim of this randomised clinical trial study is to evaluate whether supplementation with vitamin D could reduce the risk of uterine fibroids in reproductive stage women.
- Conditions
- Gynaecological Disease, Vitamin D Deficiency, Uterine Fibroids
- Trial name
- ABVDATROUF (NCT03586947)
- Testing
- Vitamin D3 400 UNT Oral Capsule
- Where
- China
- Volunteers
- 1,160 people, healthy volunteers welcome
- Sponsor
- Second Affiliated Hospital of Wenzhou Medical University
Anemia, Folate Deficiency
Quadruple Fortified Salt Trial in India
Women of reproductive age are at an increased risk of anemia and micronutrient deficiencies. Evidence supports the role of periconceptional nutrition in the development of neural tube defects and other pregnancy complications.
- Conditions
- Anemia, Folate Deficiency, Vitamin B 12 Deficiency
- Trial name
- QFS (NCT03853304)
- Testing
- + Folic acid, + Vitamin B12, DFS
- Where
- India
- Volunteers
- 1,000 people, healthy volunteers welcome
- Sponsor
- Cornell University
Osteoporosis, Vitamin D Deficiency
A Study of MK0217A and Dietary Supplement in Men and Postmenopausal Women With Osteoporosis (0217A-227)
The purpose of this study is to test the safety, tolerability, and effectiveness of an investigational drug and dietary supplement to reduce the risk of vitamin D insufficiency and deficiency during treatment of osteoporosis in…
- Trial name
- NCT00092079
- Testing
- MK0217A, alendronate sodium (+) cholecalciferol / Duration of Treatment: 24 weeks
- Volunteers
- 652 people
- Sponsor
- Merck Sharp & Dohme LLC
Coagulation Factor Deficiency, Coagulopathy, Consumption
Effect of Vitamin K in Critically Ill Patients
Critically ill patients with spontaneously prolonged pro-thrombin time, where administration of intravenous administration of phytomenadione (vitamin K) has been ordered by the treating physician will be identified.
- Conditions
- Coagulation Factor Deficiency, Coagulopathy, Consumption, Vitamin K Deficiency
- Trial name
- VITAKOAG (NCT03782025)
- Testing
- Phytomenadione
- Where
- 2 sites in Sweden
- Volunteers
- 52 people
- Sponsor
- Region Skane
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