Clinical trials: Vitamin D Status
Actinic Keratosis
Potential Impact of Patient Vitamin D Status in AK Response to MAL-PDT
In topical photodynamic therapy (PDT) for non-melanoma skin cancers, a photosensitizing prodrug, 5-aminolaevulinic acid (ALA) or its methylated ester, methyl aminolevulinate (MAL), is converted to the endogenous photosensitizer…
- Trial name
- PDT (NCT02878382)
- Testing
- Conventional MAL-PDT, Calcipotriol assisted MAL-PDT
- Where
- 2 sites in Brazil
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- University of Sao Paulo
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
Sub-optimal Vitamin D Status, Pre-diabetes
Effect of Vitamin D3 Supplementation on Insulin Resistance- The DIR Study
Insulin resistance is a state where the body does not respond as it should to the insulin it produces. Individuals who are insulin resistant are at increased risk of both heart disease and type 2 diabetes; importantly, diabetes…
- Conditions
- Sub-optimal Vitamin D Status, Pre-diabetes, Insulin Resistance
- Trial name
- NCT01889810
- Testing
- Vitamin D3 supplementation
- Where
- United Kingdom
- Volunteers
- 81 people, healthy volunteers welcome
- Sponsor
- Queen's University, Belfast
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
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 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 Status, Healthy
Comparison of the Efficacy of Calcium-cholecalciferol Foodstuffs and Calcium-cholecalciferol Supplement
This study is conducted in two phases. At the first phase, the prevalence of vitamin D insufficiency in primary school-children in Tehran is determined during the cold seasons of 2008.
- Trial name
- NCT00864539
- Testing
- fortified milk, plain milk, fortified orange juice
- Volunteers
- 585 people, healthy volunteers welcome
- Sponsor
- National Nutrition and Food Technology Institute
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
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