Clinical trials: Vitamin D Status
Vitamin D Concentration, Vitamin D Status
A Comparison of Capsules and Oral Spray Solution as Methods of Delivering Vitamin D3 and Raising Status
The aim of the study is to compare the effectiveness of a vitamin D3 oral spray solution with capsules at raising vitamin D status over winter.
- Trial name
- SCD3 (NCT02608164)
- Testing
- 3000IU(75μg) vitamin D3
- Where
- United Kingdom
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- University of Ulster
Frailty, Physical Disability
Vitamin D and Calcium Supplementation at Danish Nursing Homes
Nursing home residents are in high risk of vitamin D deficiency, which negatively affects bone health. Vitamin D and calcium supplements have shown to increase bone density and reduce fracture risk and may affect daily physical…
- Conditions
- Frailty, Physical Disability, Aging, Muscle Weakness
- Trial name
- NCT04956705
- Testing
- Vitamin D and calcium
- Where
- 2 sites in Denmark
- Volunteers
- 109 people, healthy volunteers welcome
- Sponsor
- University College Copenhagen
Vitamin D Deficiency
Follicular Fluid, Bioavailable Vitamin D and Embryo Quality Markers
To determine the correlation between bioavailable Vitamin D values and euploid status of the embryos in larger size follicles from UAE women undergoing in vitro fertilization procedures.
- Trial name
- NCT03073720
- Where
- United Arab Emirates
- Volunteers
- 43 people, healthy volunteers welcome
- Sponsor
- ART Fertility Clinics LLC
Muscle Function, Muscle Soreness
Vitamin D2, Muscle Damage, NASCAR Pitcrew
Hypothesis: Six weeks of supplementation with vitamin D (4000 IU/day) using Dole's Vitamin D Portobello Mushroom Powder will increase winter serum vitamin D levels, and improve muscle function and strength, and innate immunity…
- Conditions
- Muscle Function, Muscle Soreness, Vitamin D Status
- Trial name
- NCT01825616
- Testing
- Vitamin D2 mushroom powder
- Where
- 3 sites in United States
- Volunteers
- 33 people, healthy volunteers welcome
- Sponsor
- Appalachian State University
Healthy, Vitamin D Deficiency
Can Correction of Low Vitamin D Status in Infancy Program for a Leaner Body Composition?
One in four infants are born with low amounts of vitamin D stored in their body. This study is designed to test whether improving vitamin D status quickly after birth helps infants to build muscle and to normalize growth.
- Conditions
- Healthy, Vitamin D Deficiency, Gestational Diabetes
- Trial name
- NCT02563015
- Testing
- cholecalciferol, Reference 400
- Where
- Canada
- Volunteers
- 139 people, healthy volunteers welcome
- Sponsor
- McGill University
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.
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
Healthy, no Evidence of Disease
Cholecalciferol and Flu Vaccine in Treating Healthy Participants
This randomized clinical trial studies cholecalciferol and flu vaccine in treating healthy participants. Cholecalciferol may increase the immunologic response of flu vaccine in healthy participants.
- Trial name
- NCT01561989
- Testing
- cholecalciferol, questionnaire administration, trivalent influenza vaccine
- Where
- United States
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- Roswell Park Cancer Institute
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)
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
The Effect of Vitamin D3 Therapy on Vitamin D Status in Pregnant Women With Vitamin D Deficient and Insufficient
This study is a randomized controlled trial which compares the effect of vitamin D3 therapy 5,000 IU daily and 50,000 IU on 25(OH)D and 1,25(OH)2D, VDBP, and 24,25(OH)2D maternal serum levels in pregnant women with vitamin D…
- Trial name
- NCT06054919
- Testing
- Cholecalciferol
- Where
- Indonesia
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- Universitas Indonesia
Iron Deficiency, Anemia; Deficiency, Nutritional, With Poor Iron Absorption
A Study to Investigate the Effect of Vitamin D3 Supplementation on Iron Status in Iron Deficient Women
Iron is one of the most vital elements in humans as it plays a role in physiological functions such as transferring and storing oxygen, transporting electrons and catalysing numerous reactions, from oxidative metabolism to…
- Conditions
- Iron Deficiency, Anemia; Deficiency, Nutritional, With Poor Iron Absorption, Vitamin D Deficiency
- Trial name
- NCT02714361
- Testing
- Vitamin D3 supplement
- Where
- United Kingdom
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- University of Chester
Vitamin D Deficiency
Vitamin D and Health Status of British African-Caribbean Women
Vitamin D deficiency remains a global public health issue (Wilson 2017). In the United Kingdom (UK). There is a lack of research looking at vitamin D status of the British African-Caribbean population.
- Trial name
- NCT04179370
- Testing
- N/A - no intervention. Observational study.
- Where
- United Kingdom
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University of Surrey
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
Obesity
Effect of Vitamin D3 Supplementation on Insulin Resistance and Cardiovascular Risk Factors in Obese Adolescents
The prevalence of obesity has reached epidemic proportions nationally as well as internationally. Currently, 16 % of American adolescents are obese.
- Trial name
- NCT00858247
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 51 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
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
The Effect of Vitamin D on Bone Accretion and Turn-Over in Young Girls
Objectives To evaluate the effect of increased vitamin D intake on vitamin D status, bone mass and bone turnover in young girls aged 12-13.
- Trial name
- NCT00267540
- Testing
- cholecalciferol (D3) (vitamin)
- Where
- Denmark
- Volunteers
- 225 people, healthy volunteers welcome
- Sponsor
- University of Copenhagen
Vitamin D Status
Maintenance of Vitamin D Level by UVB Radiation
The purpose of the study is to determine the frequency of UVB radiations necessary to maintain the Vitamin D level during winter time.
- Trial name
- NCT01101243
- Testing
- Broadband UVB, Control group
- Where
- Denmark
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Bispebjerg Hospital
Healthy
Study Comparing Two Isoforms of Vitamin D Supplements for Infants
There are two different types of vitamin D - vitamin D3 (animal source) and vitamin D2 (plant source). Almost all the usual vitamin D preparations for infants available in Canadian pharmacies contain vitamin D3 which may not be…
- Trial name
- NCT01190137
- Testing
- Cholecalciferol (D3) or ergocalciferol (D2)
- Where
- Canada
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- McGill University
Vitamin D Status
The Vitamin D Dose-Response Relationship
The purpose of the study is to determine the importance of the UV intensity and the UVB dose on the Vitamin D response after UVB.
- Trial name
- NCT01074541
- Testing
- UVB
- Where
- Denmark
- Volunteers
- 55 people, healthy volunteers welcome
- Sponsor
- Bispebjerg Hospital