Clinical trials: Vitamin D3 Deficiency
Hypertensive Disease, Deficiency of Vitamin D3
Effect of Vitamin D3 on Cardiovascular Risk Factors
The aim of this study is to investigate whether a supplementation of Vitamin D3 can be used to reduce atherosclerotic risk factors.
- Trial name
- NCT01501916
- Testing
- Vitamin D3
- Volunteers
- 250 people, healthy volunteers welcome
- Sponsor
- Martin-Luther-Universität Halle-Wittenberg
COVID-19 Pandemic, D Vitamin Deficiency
Impact of Vitamin D Supplementation on COVID-19 Vaccine Response and IgG Antibodies in Deficient Women.
Decreased immunity in individuals causes a decrease in vaccine response, and vitamin D worsens this course. Vitamin D is thought to be a vitamin that can strengthen the innate immune response, inhibit the adaptive system, and…
- Conditions
- COVID-19 Pandemic, D Vitamin Deficiency, Antibody Hypersensitivity
- Trial name
- CoVıD-19 (NCT05447065)
- Testing
- Vitamin D supplement
- Where
- Turkey (Türkiye)
- Volunteers
- 33 people, healthy volunteers welcome
- Sponsor
- Ege University
Pre-Eclampsia, Depression
Preeclampsia Research on Vitamin D, Inflammation, & Depression
This study is designed to comprehensively investigate the anti-inflammatory role of vitamin D in reproductive aged women, and its association with preeclampsia and depression.
- Conditions
- Pre-Eclampsia, Depression, Inflammation, Vitamin D Deficiency
- Trial name
- PROVIDE (NCT03018132)
- Testing
- mental health screening, education and referral program
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Cedars-Sinai Medical Center
Vitamin D Deficiency, Pre-Eclampsia
Effect of Vitamin D3 Supplementation in Pregnancy on Risk of Pre-eclampsia
Vitamin D deficient pregnant ladies were selected and randomized into 2 groups for routine daily dose of multivitamin (400IU vitamin D3) versus maximum safest treatment daily dose (4000IU vitamin D3).
- Trial name
- NCT03101150
- Testing
- 400 IU Vitamin D3, 4000 IU Vitamin D3
- Volunteers
- 179 people, healthy volunteers welcome
- Sponsor
- King Fahad Medical City
Vitamin D Deficiency, Vitamin D Insufficiency
Evaluating the Effect of SOLIUS UV Light Source in Improving Vitamin D Status
The aim of this study is to evaluate the safety and effectiveness of the SOLIUS System in improving serum levels of 25-hydroxyvitamin D in vitamin D deficient/ insufficient adults of various skin types.
- Trial name
- NCT04780776
- Testing
- UVB treatment
- Where
- United States
- Volunteers
- 69 people, healthy volunteers welcome
- Sponsor
- Boston University
Vitamin D Deficiency, Aging Well
Innovative Food Structures to Enhance Nutrient Bioavailability
This randomized controlled trial (RCT) will compare the change in vitamin D status (25-hydroxyvitamin D nmol/L) after a 4 week intervention with 4 groups: 1. Vitamin D enriched (20ug) olive oil emulsion drink 2.
- Trial name
- NutriPlus (NCT04156074)
- Testing
- Vitamin D enriched (20 mcg/day) olive oil emulsion drink, Vitamin D enriched (20 mcg/day) coconut oil emulsion drink, Vitamin D supplement (20 mcg/day)
- Where
- Ireland
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- University College Dublin
Vitamin D Deficiency
The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults
Many older adults do not get enough zinc, vitamin C and vitamin D, and this can be related to decreased ability to fight infection.
- Trial name
- NCT02876315
- Testing
- Redoxon VI
- Where
- United States
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- Oregon State University
Autism
Influence of Vitamin D Deficiency on the Development of Autism
The investigators wish to study the effect of Vitamin D on the development of autism in children. The investigators will also investigate the environmental and genetic influences on the level of Vitamin D in children with autism.
- Trial name
- NCT02222311
- Testing
- Blood Samples
- Where
- Israel
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Hillel Yaffe Medical Center
Insulin Resistance
Vitamin D Supplementation and Glycemic Outcomes
The investigators examined the effect of vitamin D supplementation on glucose homeostasis and metabolic markers in healthy normal weight and overweight young subjects and healthy normal-weight and overweight elderly subjects…
- Trial name
- NCT02942732
- Testing
- cholecalciferol (Euro-Pharm International, Canada)
- Volunteers
- 180 people, healthy volunteers welcome
- Sponsor
- Université d'Auvergne
Obesity, Vitamin D3 Deficiency
Vitamins D and K Effects on Vascular Function in Obese Adults.
A prospective, randomized, placebo-controlled, double-blind study that aims to evaluate the effects of combined vitamin D3 and K2-MK7 supplementation on vascular function, sympathetic tone, metabolic biomarkers and inflammatory…
- Trial name
- NCT05689632
- Testing
- Vitamin D3 + K2-MK7, Vitamin D3
- Where
- Brazil
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Hospital Universitario Pedro Ernesto
Vitamin D Deficiency, Hypovitaminosis A
A Randomized Controlled Trial Testing The Effect Of A Multi-Nutrient Fortified Juice
The goal of this investigator-initiated study is to determine whether the fortification of orange juice with vitamin D, vitamin A, and vitamin E will enhance the vitamin D, vitamin A, and vitamin E status children ages 6-10 that…
- Conditions
- Vitamin D Deficiency, Hypovitaminosis A, Vitamin E Deficiency
- Trial name
- NCT01909063
- Testing
- Vitamin D, Vitamin D, Vitamin E, and Vitamin A, Control, 700 mg Calcium
- Where
- United States
- Volunteers
- 180 people, healthy volunteers welcome
- Sponsor
- Boston University
Vitamin D Deficiency
Optimizing Vitamin D Nutrition in Healthy Adults
The purpose of this study is to determine the average dosage of oral vitamin D supplementation to maintain optimal vitamin D levels in the body and to see if there are differences in the response to oral vitamin D supplementation…
- Trial name
- NCT00327847
- Testing
- Oral Vitamin D Supplementation
- Where
- United States
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Winthrop University Hospital
Vitamin D Deficiency
Safety, Efficacy, and Feasibility of High-dose Cholecalciferol in Pediatric Patients With Cystic Fibrosis
Children with Cystic Fibrosis, ages greater than and equal to 36 months of age and less than or equal to 18 years of age, with a 25OHD level less than 30 ng/dL will be asked to participate in this study.
- Trial name
- NCT02613884
- Testing
- Treatment
- Where
- United States
- Volunteers
- 26 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins All Children's Hospital
Deficiency, Vitamin D, Insulin Resistance
Vitamin D Supplementation and and Glycemic Indexes
Age affect insulin sensitivity and the metabolism, and vitamin D status was shown to have a correlation with markers of insulin resistance.
- Trial name
- NCT03478475
- Testing
- cholecalciferol (Euro-Pharm International, Canada)
- Volunteers
- 115 people, healthy volunteers welcome
- Sponsor
- Université d'Auvergne
Hypertension, Vitamin D Deficiency
Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study
Adequate levels of vitamin D are essential for bone health at all ages but low levels of vitamin D may also negatively impact other aspects of health such as blood pressure.
- Trial name
- BBC (NCT03070483)
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 5 people, healthy volunteers welcome
- Sponsor
- Loyola University
Phosphate Diabetes, X-linked Hypophosphatemia
Phosphorus-31 Spectroscopy in Phosphate Diabetes
Phosphate diabetes is defined by urinary phosphate wasting due to impaired tubular reabsorption. It can be classified based on either a genetic or acquired origin.
- Trial name
- Phos-ATP (NCT06921720)
- Testing
- intra-muscular ATP values in phosphate diabetes, intra-muscular phosphate values in phosphate diabetes
- Where
- 2 sites in France
- Volunteers
- 65 people, healthy volunteers welcome
- Sponsor
- Hospices Civils de Lyon
Elderly, Metabolic Syndrome
Metabolic Syndrome and Vitamin D Level in Old People
In 2012, a cross-sectional survey sampling 1,966 community-dwelling old people was conducted. Structurized questionnaires were interviewed face-to-face by well-trained staffs.
- Conditions
- Elderly, Metabolic Syndrome, Vitamin D Deficiency, Ostreocalcin
- Trial name
- NCT03344718
- Where
- Taiwan
- Volunteers
- 549 people, healthy volunteers welcome
- Sponsor
- National Cheng-Kung University Hospital
Vitamin D Deficiency, Periodontitis
25-Hydroxyvitamin D Levels in Patients With Periodontitis (Stage III)
Periodontitis; is an inflammatory disease of tissues characterized by bone destruction around the teeth. Vitamin D plays an important role in several inflammatory diseases by promoting the expression of inflammatory cytokines…
- Trial name
- NCT05343273
- Testing
- taking a blood sample
- Where
- Turkey (Türkiye)
- Volunteers
- 83 people, healthy volunteers welcome
- Sponsor
- Ataturk University
Vitamin D Deficiency
Comparison of 25-hydroxy Vitamin D Level in Caucasian Women Receiving Vitamin D Supplementation and Not Receiving Supplementation: a Randomized Controlled Trial.
The objective of this study is to assess whether vitamin D supplements are sufficient to increase females who are deficient or borderline deficient in vitamin D levels to normal levels.
- Trial name
- NCT00882505
- Testing
- vitamin D
- Where
- United States
- Volunteers
- 67 people, healthy volunteers welcome
- Sponsor
- Northwestern University
Iron-deficiency
Effect of Vitamin D3-fortified Fruit Juice on Iron Status in Women
The present study is designed to utilise vitamin D3 supplements that may potentially act as an iron absorption enhancer to improve iron status in the Malaysian child-bearing aged women with low iron stores.
- Trial name
- NCT04618289
- Testing
- Vitamin D3-fortified fruit juice supplement
- Where
- Malaysia
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- Universiti Putra Malaysia