Clinical trials: Vitamin Deficiencies
Hypovitaminosis D
To Study the Nutri-Genomic Response of Vit-D Supplementation in African-Americans
Three hundred thirty (330) overweight, pre-hypertensive/controlled hypertensive, African-American participants will be enrolled in a 8 week study to assess the effect of two administrations of Vitamin D3 on Vitamin D serum…
- Trial name
- NCT02802449
- Testing
- 25 Hydroxy- Vitamin D3 [25 (OH) D3]
- Where
- United States
- Volunteers
- 330 people, healthy volunteers welcome
- Sponsor
- Charles Drew University of Medicine and Science
Leiomyoma, Vitamin D Deficiency
Vitamin D Deficit in Women With Uterine Fibroids
Determinate the level of vitamin D in blood, and evaluate the prevalence of deficit and insufficiency among patients with diagnosis of uterine fibroids
- Conditions
- Leiomyoma, Vitamin D Deficiency, Fibroid Uterus
- Trial name
- NCT04030182
- Testing
- Level of Vitamin D
- Where
- 2 sites in Mexico
- Volunteers
- 127 people, healthy volunteers welcome
- Sponsor
- Instituto Mexicano del Seguro Social
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
Hypovitaminosis D, Hypovitaminosis
Evaluating Response to Vitamin D3 and K2 Supplementation in Healthcare Personnel
The main purpose of this research study is to learn about the effects of supplemental vitamin D3 and vitamin K2 on blood levels and the gut microbial community, called the gut microbiome.
- Trial name
- NCT07199829
- Testing
- Vitamin Arm 1, Vitamin Arm 2, Vitamin Arm 3
- Where
- United States
- Volunteers
- 96 people, healthy volunteers welcome
- Sponsor
- Madigan Army Medical Center
Dementia, Viral Infection
Electronic Medical Records to Increase Adherence to the Choosing Wisely Recommendations
Audit and Feedback (A\&F), a strategy aimed at promoting modified practice through performance feedback, is a method to change provider behaviour and reduce unnecessary medical services.
- Conditions
- Dementia, Viral Infection, Vitamin D Deficiency
- Trial name
- NCT05385445
- Testing
- Audit and Feedback
- Where
- Canada
- Volunteers
- 239 people, healthy volunteers welcome
- Sponsor
- University of Manitoba
Vitamin D Deficiency
The Efficacy of Different Vitamin D Supplementation Delivery Methods
To test the efficacy of different vitamin D delivery methods on serum 25(OH)D. Participants randomly assigned to one of seven groups - three placebo groups and 4 active supplement groups receiving 100,000IU vitamin D3
- Trial name
- NCT03463642
- Testing
- vitamin D3, Pill, orange syrup
- Where
- United Kingdom
- Volunteers
- 62 people, healthy volunteers welcome
- Sponsor
- University of Wolverhampton
Phosphorus and Calcium Disorders, Chronic Kidney Disease Mineral and Bone Disorder
Calcium and Phosphorus Whole-Body Balance and Kinetics in Patients With Moderate Chronic Kidney Disease
This pilot study aims to develop a method for simultaneous whole-body calcium and phosphorus balance and full kinetic modeling of both ions in patients with chronic kidney disease.
- Conditions
- Phosphorus and Calcium Disorders, Chronic Kidney Disease Mineral and Bone Disorder, Chronic Kidney Diseases
- Trial name
- NCT04019379
- Testing
- High Phosphorus Diet, Low Phosphorus Diet
- Where
- United States
- Volunteers
- 3 people
- Sponsor
- University of Minnesota
Vitamin D Deficiency, Peripheral Neuropathy
Vit D and Peripheral Neuropathy in Taxane Naive Patients
To evaluate the efficacy of vit D supplement in cancer patients which receive taxane drugs with vit D deficiency and complaining from Peripheral neuropathy
- Trial name
- NCT05852496
- Testing
- Vitamin D
- Volunteers
- 60 people
- Sponsor
- Assiut University
Choline Deficiency, Vitamin B-12 Deficiency
Cracking the Egg Potential: Improving Young Child Nutrition in Ecuador
The proposed study will fill an important gap in the literature by examining, through a randomized controlled trial, the effect of egg consumption on biochemical markers of choline, vitamin B-12, lipids, and amino acids in young…
- Conditions
- Choline Deficiency, Vitamin B-12 Deficiency, Lipids Deficiency, Amino Acids Deficiency
- Trial name
- NCT02446873
- Testing
- Egg supplementation
- Where
- Ecuador
- Volunteers
- 171 people, healthy volunteers welcome
- Sponsor
- Washington University School of Medicine
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
Neuropathic Pain, Vitamin B 12 Deficiency
Pre- and Post-Treatment Investigation of B12 and Folic Acid (Folate) Levels in Patients Receiving Antiepileptic (Anticonvulsant) Treatment for Neuropathic Pain
Neuropathic pain (NeP) is a disorder of the nervous system resulting from altered mechanisms operating at the peripheral nervous system, spinal cord and supraspinal levels and is defined by the International Association for the…
- Trial name
- NCT07013318
- Where
- Turkey (Türkiye)
- Volunteers
- 96 people
- Sponsor
- Gaziosmanpasa Research and Education Hospital
Hypovitaminosis D, Cardiovascular Diseases
Effect of vitaminD3 or 25(OH)D3 Fortified Dairy on Vitmain D Status and CVD Risk Markers
This study aims to compare the acute effect of consuming milk and butter fortified with either vitamin D3 or 25 (OH) D3 on serum/plasma vitamin D status in humans.
- Trial name
- NCT02535910
- Testing
- vitamin D3, 25(OH) D3, Control
- Where
- United Kingdom
- Volunteers
- 18 people, healthy volunteers welcome
- Sponsor
- University of Reading
Vitamin D Deficiency, Vitamin D3 Deficiency
Development of a Screening Tool for the Risk of Vitamin D Deficiency
Since vitamin D deficiency is a condition that affects a high percentage of individuals of all ages and given the attention on the possible role of the deficiency of this vitamin in the development of various chronic diseases…
- Conditions
- Vitamin D Deficiency, Vitamin D3 Deficiency, Vitamin D
- Trial name
- EvidenceQ (NCT04404842)
- Where
- Italy
- Volunteers
- 190 people
- Sponsor
- University of Pavia
Medication and Supplement Use, Pregnant Women
A Cross-sectional Study Evaluating Pregnancy Related Use of Vitamins and Medication
This cross-sectional study will try to give answers to the following project aims: To provide an overview of the prevalence of health products' use among Belgian pregnant women (prescription and OTC medication, vitamin…
- Trial name
- PREVIM (NCT03105583)
- Testing
- Medication use during pregnancy, Supplement use during pregnancy, Vitamin status of a pregnant woman
- Volunteers
- 381 people, healthy volunteers welcome
- Sponsor
- KU Leuven
Vitamin A Deficiency, Malaria
Assessing Model Parameters for Applying the Retinol Isotope Dilution (RID) Method
For assessing body retinol pools in preschool children, it is recommended that a blood sample is taken 14-21 days after isotope dosing. During this period, dietary intake of vitamin A should be controlled.
- Conditions
- Vitamin A Deficiency, Malaria, Inflammation
- Trial name
- SUPERKID (NCT02996513)
- Testing
- Retinol Isotope Dilution (RID)
- Where
- Nigeria
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Wageningen University
Secondary Hyperparathyroidism
Suspected Deficient Activation of Vitamin D in Patients With Secondary Hyperparathyroidism
The purpose of this study is to determine if a reduction in the enzyme 1-hydroxylase, which activates Vitamin D, is the cause of overactivity of the parathyroid glands (called secondary hyperparathyroidism - normal blood calcium…
- Trial name
- 1hydroxylase (NCT00754442)
- Testing
- Teriparatide
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- University of Maryland, Baltimore
Ergocalciferol
Pilot Study: The Effect of Ergocalciferol on Plasma Mucin-1 Levels
To determine if a one-time oral administration of ergocalciferol results in a decline in plasma mucin-1 levels in healthy individuals and individuals with ADTKD-MUC1.
- Trial name
- NCT03747523
- Testing
- Ergocalciferol
- Where
- United States
- Volunteers
- 44 people, healthy volunteers welcome
- Sponsor
- Wake Forest University Health Sciences
Vitamin D Deficiency
The Effect of Vitamin D and Exercise on Balance in Postmenopausal Women
In recent years, skeletal and nonskeletal effects of vitamin D has been studied. One of the effects of it was balance and fall prevention. However, these studies were performed on older patients who had not vitamin D deficiency.
- Trial name
- NCT03608488
- Testing
- Vitamin D, Exercise
- Where
- Turkey (Türkiye)
- Volunteers
- 110 people, healthy volunteers welcome
- Sponsor
- Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey
Healthy Humans
Immune and Metabolic Effects of Vitamin D Supplementation in Healthy Humans
In this placebo controlled study the investigators aim to investigate the effect of a 3 month vitamin D supplementation on parameters of the immune, endocrine and metabolic system in healthy women and men. Vitamin D.
- Trial name
- NCT01248442
- Testing
- Cholecalciferol
- Where
- Austria
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Hypovitaminosis D, Type 2 Diabetes Mellitus
Vitamin D and Type 2 Diabetes - a Cross Sectional Study
The purpose of the study is to describe vitamin D status among patients with type 2 diabetes and to determine the association between serum 25-hydroxyvitamin D and glycemic control, markers of inflammation and blood pressure
- Trial name
- NCT00695474
- Volunteers
- 150 people
- Sponsor
- University of Aarhus
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