Clinical trials: Vitamin D
Latent Tuberculosis
Vitamin D Supplementation in TB Prevention
The goal of this clinical trial is to determine whether vitamin D supplementation reduces risk of acquiring latent tuberculosis infection (LTBI) in school age children in Mongolia.
- Trial name
- NCT02276755
- Testing
- Cholecalciferol (vitamin D3)
- Where
- Mongolia
- Volunteers
- 8,851 people, healthy volunteers welcome
- Sponsor
- Harvard School of Public Health (HSPH)
Diabetes Mellitus Type 2 With Periodontal Disease
Diabetes Mellitus and Periodontitis and Vitamin D Supplementation
This study investigates the clinical and biochemical results of vitamin D supplementation in addition to non-surgical periodontal treatment in individuals with Type II diabetes mellitus and periodontitis.
- Trial name
- NCT06077708
- Testing
- Vitamin D3K2, Saline Solution
- Where
- Turkey (Türkiye)
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- Kırıkkale University
Vitamin D Biofortification, Vitamin D Fortification
Vitamin D (Bio)Fortified Shopping Baskets to Improve Vitamin D Status
Vitamin D is essential for healthy bones, muscles, and immune function. It comes from food, supplements, and sunlight. There are two main forms; vitamin D2, found mainly in plant foods, and vitamin D3, which comes from animal…
- Conditions
- Vitamin D Biofortification, Vitamin D Fortification, Vitamin D Status
- Trial name
- NCT07349290
- Testing
- Vitamin D (bio)fortified food basket, Control food basket
- Where
- United Kingdom
- Volunteers
- 160 people, healthy volunteers welcome
- Sponsor
- University of Ulster
Vitamin D Deficiency
Vitamin D Levels Following Topical Application of Vitamin D Ointment
This is a pre-post open label trial to assess the change in Vitamin D blood levels following treatment with three doses of topical Vitamin D3 in subjects with existing Vitamin D deficiency.
- Trial name
- VITD-001 (NCT02676674)
- Testing
- Dose 1, Dose 2
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- University of Minnesota
Polycystic Ovary Syndrome, Metabolic Syndrome
Study of the Effect of a Nutritional Supplement on Microbiota, Metabolic Control, Inflammatory Profile, and Quality of Life in Patients With Polycystic Ovary Syndrome.
Polycystic Ovary Syndrome (PCOS) is a complex endocrine-metabolic disorder characterized by elevated androgen levels due to ovarian overproduction.
- Trial name
- NCT06551285
- Testing
- Ovapro (Lifepro)
- Where
- Spain
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Celia Bañuls
Health, Subjective
The Effects of a Multi-vitamin Supplement in Adult Females
The investigators are examining how the daily consumption of a multi-vitamin/mineral supplement affects the following variables in 21-40 year old women: 1.
- Trial name
- MVS (NCT03828097)
- Testing
- Experimental supplement
- Where
- United States
- Volunteers
- 94 people, healthy volunteers welcome
- Sponsor
- Auburn University
Obesity, Overweight
Calcium Supplementation for a Healthy Weight (CaSHeW)
The objective of this study is to investigate the effect of calcium (Ca) and vitamin D (D) supplemented orange juice (OJ) on weight loss and visceral fat mass in overweight and obese adults.
- Trial name
- CaSHeW (NCT01363115)
- Testing
- Orange Juice fortified with Calcium and Vitamin D, Orange juice without Ca or VitD, Nutritional Counseling
- Where
- United States
- Volunteers
- 130 people, healthy volunteers welcome
- Sponsor
- Massachusetts General Hospital
Type 2 Diabetes
HBA1c and Diagnosis of Type 2 Diabetes
Following the 6th Tromso study subjects with HbA1c > 5.7 plus a subsample of subjects with lower hba1c values will be invited to an oral glucose tolerance test to see the predictive value of HBA1c in the diagnosis of type 2…
- Trial name
- NCT01184768
- Where
- Norway
- Volunteers
- 3,509 people, healthy volunteers welcome
- Sponsor
- University of Tromso
Osteoporosis
The Effect of Inactive and Active Vitamin D on Serum Sclerostin/dickkopf1 Levels
The purpose of this study is to compare the effect of inactive and active vitamin D on serum sclerostin and dickkopf1 levels.
- Trial name
- NCT01765010
- Testing
- Calcitriol, Alfacalcidol, Cholecalciferol
- Where
- South Korea
- Volunteers
- 88 people, healthy volunteers welcome
- Sponsor
- Seoul National University Hospital
Vitamin D Concentration
Vitamin D Satus in Adults With Newly Diagnosed ITP
Investigator study aims to assess the level of vitamin D in adult patients with newly diagnosed ITP and correlation between its level and treatment respose
- Trial name
- NCT07146555
- Testing
- No Interventions
- Volunteers
- 84 people, healthy volunteers welcome
- Sponsor
- Assiut University
Postmenopausal Osteoporosis
Prevention of Early Postmenopausal Bone Loss With Lactobacillus Reuteri
This study evaluates the effect of two different doses of Lactobacillus reuteri ATCC PTA 6475 (L.reuteri 6475) on bone loss in early postmenopausal women.
- Trial name
- ELBOWII (NCT04169789)
- Testing
- Lactobacillus reuteri ATCC PTA 6475 (L. reuteri 6475)
- Where
- Sweden
- Volunteers
- 239 people, healthy volunteers welcome
- Sponsor
- Sahlgrenska University Hospital
Vitamin D Deficiency
Different Vitamin D Preparations & FGF23 in Humans
Fibroblast growth factor 23 (FGF23) is a new hormone which controls phosphate and vitamin D levels in humans. Excess FGF23 is associated with an increased risk of death in patients with chronic kidney disease.
- Trial name
- NCT00957879
- Testing
- Ergocalciferol, Calcitriol
- Where
- United States
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- Massachusetts General Hospital
Healthy
Safety and Pharmacokinetic Characteristics of DP-R206(Vitamin D3) in Healthy Adult Volunteers
The purpose of this study is to compare the pharmacokinetic characteristics of DP-R206 (150mg Ibandronate / 24,000 IU Vitamin D3 complex tablet, qd) and Vitamin D3 (24,000 IU Vitamin D3 , qd) after oral administration in healthy…
- Trial name
- NCT01577849
- Testing
- Vitamin D3, DP-R206
- Where
- South Korea
- Volunteers
- 36 people, healthy volunteers welcome
- Sponsor
- Alvogen Korea
Autism Spectrum Disorders
Oxidative Stress and Vitamin D Levels in Autism Spectrum Disorders
Oxidative Stress and Vitamin D Levels in Autism Spectrum Disorders
- Trial name
- NCT06983379
- Where
- Turkey (Türkiye)
- Volunteers
- 68 people, healthy volunteers welcome
- Sponsor
- Mardin Artuklu University
Subconcussive Head Impact, Omega-3 Fatty Acids
Omega-3 Fatty Acids and Subconcussive Head Impacts
The purpose of the proposed double-blind, randomized placebo-controlled trial is to understand how supplementation with fish oil [docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA)] promote brain health against soccer…
- Trial name
- NCT06736925
- Testing
- Omega-3 Fatty Acids (EPA plus DHA), Organic soybean oil, Soccer Heading Model
- Where
- United States
- Volunteers
- 208 people, healthy volunteers welcome
- Sponsor
- Indiana University
Vitamin A Deficiency
Effect of Daily Consumption of Orange Maize on Breast Milk Retinol in Lactating Zambian Women
The purpose of the study is to determine whether daily consumption of beta-carotene biofortified maize will increase breast milk retinol concentration in lactating Zambian women.
- Trial name
- NCT01922713
- Testing
- white maize and a corn oil capsule, orange maize and a corn oil capsule, white maize and a vitamin A capsule
- Where
- Zambia
- Volunteers
- 149 people, healthy volunteers welcome
- Sponsor
- University of California, Davis
Infarction, Stroke
Polymorphisms in the Vitamin D System and Health
Polymorphisms in the vitamin D system appear to affect the serum 25(OH)D levels. If so one would expect these polymorphisms to be associated with vitamin D related conditions and diseases, which will be tested in the present…
- Conditions
- Infarction, Stroke, Diabetes, Fracture
- Trial name
- NCT01395303
- Where
- Norway
- Volunteers
- 9,700 people, healthy volunteers welcome
- Sponsor
- University of Tromso
Seasonal Affective Disorder, Vitamin D3
The Role of Vitamin D Supplementation on Well Being and Symptoms of Depression During the Winter Season in Health Service Staff
The purpose of this study is to investigate whether vitamin D3 (70 micrograms) is better than placebo in preventing depression symptoms among employees in health care
- Conditions
- Seasonal Affective Disorder, Vitamin D3, Mental Health, Dietary Supplement
- Trial name
- D3-vit-SAD (NCT01462058)
- Testing
- Vitamin D3
- Where
- Denmark
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Connie Thuree Nielsen, consultant, MD, ph.d
Exercise Training, Dietary Supplements
Fish Nutrient Supplementation in High-intensity Functional Training
Nowadays, many persons who exercise consume dietary supplements. Previous scientific studies have found that protein supplementation increases muscle mass when combined with an exercise program.
- Trial name
- NCT05402527
- Testing
- Fish nutrients, Whey protein, Maltodextrin
- Where
- Greece
- Volunteers
- 25 people, healthy volunteers welcome
- Sponsor
- Aristotle University Of Thessaloniki
Rheumatoid Arthritis, Vitamin D , Disease Activity, DAS28ESR
Vitamin D Supplementation on Outcome and Disease Activity.
To study efficacy of Vitamin D on outcome and disease activity ; DAS28-ESR in Rheumatoid arthritis patients at Rajavithi hospital .
- Trial name
- NCT04909931
- Testing
- Vitamin D 2
- Where
- Thailand
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Department of Medical Services Ministry of Public Health of Thailand
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