Clinical trials: Vitamin D Status
Vitamin D Deficiency
Effects of Vitamin D3 Supplementation on Antioxidant Enzymes Status in Vitamin D3 Deficient Asthma COPD Overlap (ACO) Patients
Asthma-COPD overlap (ACO) is a new entity in the world of respiratory ailments. The respiratory tract of these patients are continuously exposed to oxidants (due to cigarette smoking) causing oxidative stress.
- Trial name
- NCT03931889
- Testing
- Vitamin D3
- Where
- Bangladesh
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
Nutritional Status, Nutrient Deficiency
Challenges in Achieving Adequate Dietary Status of Women
The aim of the study is to investigate the dietary habits of women of reproductive age (20-49 years). We aim to obtain epidemiological data on the intake and adequacy of key macronutrients and micronutrients, as well as to…
- Conditions
- Nutritional Status, Nutrient Deficiency, Micronutrient Deficiency, Vitamin D Deficiency
- Trial name
- NutriFem (NCT06745817)
- Testing
- Assessement of nutritional status, Dermis density and thickness, Skin elasticity
- Where
- 3 sites in Slovenia
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Institute of Nutrition, Slovenia (Nutris)
Vitamin D
Vitamin D, Bones, Nutritional and Cardiovascular Status
Vitamin D is not seen anymore only as a phosphocalcic hormone, but also as having an effect on global health (anti-infective, anti-inflammatory, anti-tumour roles and cardiovascular protection).
- Trial name
- VITADOS (NCT01832623)
- Testing
- Exploration of Vitamin D roles
- Where
- France
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Hospices Civils de Lyon
Breast Cancer, Vitamin D Deficiency
Epidemiological Analysis of Vitamin D and Breast Cancer Risk in Saudi Arabian Women
This is an analysis of de-identified data collected from 240 Saudi Arabian women, 120 with breast cancer and 120 control women, to evalyate if vitamin D status is associated with breast cancer risk.
- Trial name
- NCT01817231
- Where
- United States
- Volunteers
- 240 people, healthy volunteers welcome
- Sponsor
- University of Arizona
Vitamin D Deficiency
Effects of Antarctic Environment on Vitamin D Status and Health Risk Biomarkers of Its Inhabitants
The purpose of this study is to evaluate vitamin D (VD) deficiency in the population of Chilean Antarctica and evaluate the efficacy and safety of VD supplementation to decrease VD deficiency and favorably influence biomarkers…
- Trial name
- AntarD (NCT02930434)
- Testing
- cholecalciferol
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Pontificia Universidad Catolica de Chile
Malignant Melanoma
Co-stimulatory Markers and Vitamin D Status in Anti-PD1 Treated Melanoma Patients
An observational single center study designed to identify response-related biomarkers of anti-programmed death 1 (PD-1) therapy to advanced melanoma patients and to investigate if vitamin D levels are related to treatment…
- Trial name
- NCT03197636
- Testing
- Pembrolizumab
- Where
- Denmark
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Aarhus University Hospital
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
Healthy
Fortified Cheese and Yogurt Products and Vitamin D Status in Young Children? Phase 2
This study is being done to test if adding vitamin D to cheese and yogurt products will help children further improve their vitamin D intake. All children will be given a six month supply of the milk products.
- Trial name
- D-KIDS (NCT02387892)
- Testing
- Cheese & yogurt + Vitamin D, Cheese & yogurt
- Where
- Canada
- Volunteers
- 51 people, healthy volunteers welcome
- Sponsor
- McGill University
Vitamin D, Prematurity
Vitamin D Status and Dose Response in Infants
This study will examine the relationship of serum 25(OH)D levels in infants 32 weeks and greater gestation who are fed infant formula to markers of inflammation and bone metabolism.
- Trial name
- NCT01042561
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 64 people, healthy volunteers welcome
- Sponsor
- University of Nebraska
Healthy Infants
Influence of Inflammation on Micronutrient Status Assessment
Inflammation can influence several biochemical measurements those commonly used to interpret micronutrient status in children. Our primary objective is to investigate the effects of inflammation on several biochemical…
- Trial name
- NCT03801161
- Testing
- Pentavalent vaccine. It is a combination of five different antigens (Hepatitis B (HBV)/ Haemophilus influenzae type b (HiB) / Tetanus-Diphtheria-whole cell Pertussis (TDwP)).
- Where
- 2 sites in Bangladesh
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- International Centre for Diarrhoeal Disease Research, Bangladesh
Maternal Vitamin D Status
Vitamin D Supplementation and Pregnancy Outcomes
Groups (group 1 receives 1000 IU vitamin D and group 2 receives 2000 IU vitamin D) through a random allocation. It is necessary to mention that all cases in each group could be able to receive the current supplementation during…
- Trial name
- NCT03308487
- Testing
- vitamin D3 (1000 IU), Vitamin D3 (2000 IU)
- Where
- Iran
- Volunteers
- 84 people, healthy volunteers welcome
- Sponsor
- Tirang R. Neyestani, Ph.D.
Pregnancy
Vitamin D Status and Metabolism in Human Pregnancy
The purpose of the present study is to understand the effect of pregnancy on vitamin D metabolism and requirements as well as the modulatory role of the placenta in vitamin D metabolism during pregnancy.
- Trial name
- NCT03051867
- Where
- United States
- Volunteers
- 47 people, healthy volunteers welcome
- Sponsor
- Cornell University
Obesity, Vitamin D Deficiency
Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients
As the use of bariatric surgery for treatment of extreme obesity adults continues to rise, clinicians must be aware of pre-existing nutritional deficiencies in overweight and obese patients.
- Trial name
- NCT01385098
- Testing
- Vitamin D3 and Calcium
- Where
- United States
- Volunteers
- 37 people, healthy volunteers welcome
- Sponsor
- Vadim Sherman, MD
Vitamin D Deficiency
Effects of Vitamin D Fortification on Vitamin D Metabolite Profiles and Status in Vitamin D Insufficient Individuals
This is a cross-sectional study designed to compare plasma/serum and urine vitamin D metabolite profiles of vitamin D sufficient and insufficient individuals. There are two phases of this study.
- Trial name
- VITD-2013 (NCT02422784)
- Testing
- Rooibos Iced-Tea (Control), Rooibos Tea - Vitamin D3, Rooibos Tea- Vitamin D3 & Calcium
- Where
- Canada
- Volunteers
- healthy volunteers welcome
- Sponsor
- University of Manitoba
Calcium Metabolism
Calcium Absorption and Retention From Marine Products
The purpose of the study is to determine the uptake of calcium from fish bone meal from salmon and cod in 12 healthy volunteers.
- Trial name
- NCT00393289
- Testing
- Calcium controlled diet
- Where
- Denmark
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- University of Copenhagen
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 Status
The Impact of Vitamin D Status on in Vitro Fertilization (IVF) Outcomes
Infertility is a common and psychologically devastating problem for 20% of Canadian couples. Approximately, 20% of infertile couples are diagnosed with unexplained infertility and left without an explanation for their inability…
- Trial name
- NCT01348594
- Where
- Canada
- Volunteers
- 182 people, healthy volunteers welcome
- Sponsor
- University of Toronto
Vitamin D Deficiency
Vitamin D Status Fluctuations Over One Academic Year in Students
The main objective of the study is to assess changes in the concentration of vitamin D metabolite in serum throughout the academic year and to examine its relationship with the occurrence of inflammation indicators, dietary…
- Trial name
- NCT06677411
- Testing
- Observention of vitamin D
- Where
- 2 sites in Poland
- Volunteers
- 70 people, healthy volunteers welcome
- Sponsor
- Poznan University of Life Sciences
Vitamin D Deficiency, Secondary Hyperparathyroidism
Vitamin D Status in Males in Jerusalem Area and Its Correlation to Parathyroid Hormone (PTH) Level and Bone Mineral Density
Because of its high sun exposure, Israel was traditionally supposed to be protected from vitamin D deficiency, and the country food products hardly contain vitamin D supplements.
- Conditions
- Vitamin D Deficiency, Secondary Hyperparathyroidism, Osteomalacia
- Trial name
- NCT01025128
- Testing
- 25 OH vitamin D
- Where
- Israel
- Volunteers
- 210 people, healthy volunteers welcome
- Sponsor
- Clalit Health Services
Overweight and Obesity
The Effect of Vitamin D Supplementation in Overweight and Obese Pregnant Women
To understand the role of vitamin D supplementation on pregnancy outcomes and metabolic status in overweight and obese pregnant women.
- Trial name
- NCT04841265
- Testing
- Vitamin D3
- Where
- Singapore
- Volunteers
- 274 people, healthy volunteers welcome
- Sponsor
- KK Women's and Children's Hospital