Clinical trials: Vitamin D Status
Type 2 Diabetes, Nonalcoholic Fatty Liver Disease
Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Diabetes
This study is designed to study the effect of vitamin D intake on the severity of fatty liver and poor glucose control in patients with type 2 diabetes and fatty liver disease.
- Conditions
- Type 2 Diabetes, Nonalcoholic Fatty Liver Disease, Vitamin D Deficiency
- Trial name
- VDLS (NCT02132442)
- Where
- United States
- Volunteers
- 12 people
- Sponsor
- University of Massachusetts, Worcester
Renal Insufficiency, Chronic, Kidney Failure, Chronic
Almond Milk With Vitamin D: Impact on Vitamin D Status
The overall goal is to enhance vitamin D status in a safe and effective manner. A 3-week randomized comparator-controlled trial among a cohort of adults with CKD (stages 3-5) (n=24) will test the main objective: Evaluate the…
- Trial name
- NCT05165173
- Testing
- NanoD4CKD, MicroD4CKD
- Where
- United States
- Volunteers
- 21 people
- Sponsor
- University of Florida
Vitamin d, Vitamin B 12 and Folic Acid Concentrations, Micronutrient Status in Women of Reproductive Age
Vitamin B12, Folic Acid, and Vitamin D Status in Women of Reproductive Age
This cross-sectional observational study aims to assess serum concentrations of vitamin B12, folic acid, and vitamin D in women of reproductive age in Herzegovina.
- Conditions
- Vitamin d, Vitamin B 12 and Folic Acid Concentrations, Micronutrient Status in Women of Reproductive Age, Vitamin Status Assessment
- Trial name
- NCT07099586
- Testing
- No Interventions
- Where
- Bosnia and Herzegovina
- Volunteers
- 360 people
- Sponsor
- University of Mostar
Hypovitaminosis D
High Dose Preoperative Cholecalciferol Supplementation and Perioperative Vitamin D Status
A growing body of evidence suggests that robust postoperative immune function is associated with a lower risk of surgical site infections (SSIs).
- Trial name
- NCT01689779
- Testing
- 100,000 IU cholecalciferol
- Where
- United States
- Volunteers
- 60 people
- Sponsor
- Massachusetts General Hospital
Healthy Schoolchildren
Sunlight Exposure and Vitamin D in Children
The purpose of this study is to examine the amount of sunlight exposure and vitamin D status of adolescent schoolchildren in each season throughout the year.
- Trial name
- NCT01477827
- Testing
- None - observational study
- Where
- United Kingdom
- Volunteers
- 125 people, healthy volunteers welcome
- Sponsor
- University of Manchester
Diabetes, Hypertension
Identification of the Region of Vitamin D Responsiveness
Hypothesis: low vitamin D status is associated with increased insulin resistance and increased blood pressure. Approach: Multiple regression analysis of information extracted from a large database accumulated by a Canadian health…
- Trial name
- GRH-PN01 (NCT01692028)
- Where
- Canada
- Volunteers
- 4,116 people, healthy volunteers welcome
- Sponsor
- Creighton University
Vitamin D Deficiency, Pregnancy
Vitamin D Status of Pregnant Women and Their Children in Eau Claire, South Carolina
Science News (October 2004) called vitamin D deficiency a "silent epidemic" in America, with no group unaffected. Using new guidelines of optimal vitamin D levels, more than 90% of African American women now suffer from vitamin D…
- Trial name
- NCT00412087
- Testing
- cholecalciferol (vitamin D3), cholecalciferol
- Where
- United States
- Volunteers
- 564 people, healthy volunteers welcome
- Sponsor
- Medical University of South Carolina
Obesity, Vitamin D Deficiency
Effect of Exercise on Vitamin d in Obese
The aim of the current study was to investigate the effect of exercise-induced lipolysis on vitamin D status in obese children. Two types of exercises that have different effects on lipolysis were used.
- Trial name
- NCT05066490
- Testing
- Endurance exercise, Resistance exersises.
- Where
- Saudi Arabia
- Volunteers
- 30 people
- Sponsor
- Taif University
Infertility, Female, Vitamin D Deficiency
Vitamin D Status Among Infertile Women in Sweden
The goal of this prospective cohort study is to learn about the overall and seasonal prevalence of vitamin D insufficiency and its determinants in a population of women with infertility who will go through in vitro fertilization…
- Trial name
- NCT05848349
- Where
- Sweden
- Volunteers
- 265 people, healthy volunteers welcome
- Sponsor
- Vastra Gotaland Region
Vitamin D Deficiency
Muscle Metabolic Function in Older Adults With Different Vitamin D Status Before and After Exercise
This is a small pilot aerobic training trial designed to examine differences between normal-high and low vitamin D levels and 7-days of aerobic training on local VO2 measured by non-invasive Hybrid Diffuse Optical Spectroscopy.
- Trial name
- NCT02485197
- Testing
- 7 continuous days of aerobic training
- Where
- United States
- Volunteers
- 7 people, healthy volunteers welcome
- Sponsor
- David Travis Thomas
Vitamin D Deficiency
Challenges in Achieving Adequate Vitamin D Status in the Adult Population/ Part 2
The efficiency of different vitamin D formulations in treating suboptimal vitamin D status in adult population will be determined. It will provide insights into the influence of formulation on vitamin D absorption.
- Trial name
- VITAD/2 (NCT03810261)
- Testing
- Oil-based vitamin D, Water-based vitamin D, Vitamin D capsules
- Where
- Slovenia
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- Institute of Nutrition, Slovenia (Nutris)
Cognitive Performance
Efficacy of a Milk-based Nutrient-rich Bar on Nutritional Status and Cognitive Performance of School Children in Vietnam
The objective of the study is to evaluate the impact of the milk-based nutrient-rich bar, specifically the effect of its fortification with zinc, iodine, vitamins A and D and calcium on nutritional status of school children…
- Trial name
- NCT01491581
- Testing
- food bar
- Where
- Vietnam
- Volunteers
- 415 people
- Sponsor
- Institut de Recherche pour le Developpement
Vitamin D3 Deficiency
Preventing Health Disparities During Pregnancy Through Vitamin D Supplementation
The purpose of this study is to give all mothers the best chance for a healthy pregnancy through vitamin D supplementation. We will study women of diverse racial/ethnic backgrounds who will receive either the current vitamin D…
- Trial name
- NCT01932788
- Testing
- Vitamin D3 4000 IU in gummy form
- Where
- United States
- Volunteers
- 342 people, healthy volunteers welcome
- Sponsor
- Medical University of South Carolina
SARS-CoV Infection, Vitamin D Deficiency
Influence of Military Preventive Policy for reCruit Training on COVID-19 Seroconversion
This study is intended to address the association between vitamin D status and seroconversion to SARS-CoV-2 in healthy young adults.
- Conditions
- SARS-CoV Infection, Vitamin D Deficiency, Covid19, Acute Respiratory Tract Infection
- Trial name
- IMPACTCOVID (NCT04476680)
- Testing
- Vitamin D
- Where
- 2 sites in United Kingdom
- Volunteers
- 900 people, healthy volunteers welcome
- Sponsor
- Royal Centre for Defence Medicine
Nutritional Status, Nutrient Deficiency
Dietary Challenges in the Population of Nursing Homes' Residents
To obtain up-to-date data on nutritional status of older adults, a national dietary survey will be conducted in 2022/2023, providing data on the consumption of foods and enabling the assessment intakes of energy and specific…
- Conditions
- Nutritional Status, Nutrient Deficiency, Micronutrient Deficiency, Vitamin D Deficiency
- Trial name
- NUTRICARE (NCT05389618)
- Testing
- Diagnostic Tests
- Where
- Slovenia
- Volunteers
- 300 people
- Sponsor
- Institute of Nutrition, Slovenia (Nutris)