Clinical trials: Vitamin D
Vitamin D Deficiency
Controlled Trial of Prenatal Vitamin D3 Supplementation to Prevent Vitamin D Deficiency in Mothers and Their Infants
The purpose of this research study is to compare the effects of higher dose vitamin D with commonly recommended dose in pregnant women to see which is better in achieving and/or maintaining sufficient vitamin D blood levels…
- Trial name
- PA 03-103 (NCT00610688)
- Testing
- Prenatal Vitamin, Cholecalciferol (Vitamin D3)
- Where
- 2 sites in United States, United Arab Emirates
- Volunteers
- 192 people, healthy volunteers welcome
- Sponsor
- Children's Hospital Medical Center, Cincinnati
Anorexia Nervosa
Effects of Anorexia Nervosa on Peak Bone Mass
Teenage girls with anorexia nervosa (AN) are at risk for low bone density and low rates of bone accrual, raising concerns regarding acquisition of peak bone mass, an important determinant of future bone health and fracture risk.
- Trial name
- NCT01301183
- Testing
- RhIGF-1 with transdermal 17-beta estradiol
- Where
- United States
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Massachusetts General Hospital
Respiratory Infection
Human Lung Responses to Respiratory Pathogens
For most individuals, the lung has a remarkable ability to deal with exposure to a variety of inhaled bacteria. Some individuals, however, do have recurrent bacterial infections, usually in the form of acute or chronic bronchitis…
- Trial name
- NCT01967628
- Testing
- Vitamin D3 (cholecalciferol)
- Where
- United States
- Volunteers
- 98 people, healthy volunteers welcome
- Sponsor
- University of Iowa
Secondary Hyperparathyroidism
Suspected Deficient Activation of Vitamin D in Patients With Secondary Hyperparathyroidism
The purpose of this study is to determine if a reduction in the enzyme 1-hydroxylase, which activates Vitamin D, is the cause of overactivity of the parathyroid glands (called secondary hyperparathyroidism - normal blood calcium…
- Trial name
- 1hydroxylase (NCT00754442)
- Testing
- Teriparatide
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- University of Maryland, Baltimore
Vitamin D Deficiency, Pre-Eclampsia
Effect of Vitamin D3 Supplementation in Pregnancy on Risk of Pre-eclampsia
Vitamin D deficient pregnant ladies were selected and randomized into 2 groups for routine daily dose of multivitamin (400IU vitamin D3) versus maximum safest treatment daily dose (4000IU vitamin D3).
- Trial name
- NCT03101150
- Testing
- 400 IU Vitamin D3, 4000 IU Vitamin D3
- Volunteers
- 179 people, healthy volunteers welcome
- Sponsor
- King Fahad Medical City
Oxidative Stress, Anesthesia
Comparison of Total Oxidant and Total Antioxidant Capacities in Low-Flow and High-Flow General Anesthesia
The goal of this observational study is to determine whether low-flow anesthesia has a positive contribution to the total oxidant/antioxidant balance.
- Trial name
- NCT05590312
- Testing
- general anesthesia
- Where
- Turkey (Türkiye)
- Volunteers
- 72 people, healthy volunteers welcome
- Sponsor
- Duzce University
Pre-Diabetic
Effect of 1,25-dihydroxyvitamin D3, Treatment on Insulin Secretion and Muscle Strength in Pre-diabetic Persons
The purpose of this research is to study the effects of 1,25(OH)2 D3 (a prescription form of active Vitamin D) on muscle strength and insulin secretion by the pancreas and glucose utilization by skeletal muscle.
- Trial name
- NCT04286529
- Testing
- Calcitriol capsules
- Where
- United States
- Volunteers
- 17 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
Gastric Bypass, Parathyroid Hormone
Trial Of Paricalcitol and Cholecalciferol(Vitamin D3) in the Treatment Of Secondary Hyperparathyroidism in Patients After ROUX-EN-Y Gastric Bypass Surgery
Evaluate the efficacy of paricalcitol, cholecalciferol, and placebo in the reduction of parathyroid hormone in patients after Roux-en-Y gastric bypass surgery (RYGB).
- Trial name
- ExtenD (NCT01138475)
- Testing
- Paricalcitol, Cholecalciferol
- Where
- United States
- Volunteers
- 49 people, healthy volunteers welcome
- Sponsor
- Kerstyn C. Zalesin, M.D.
PCOS, Depression
Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) Trial
Open-label randomized clinical trial assessing the efficacy of Metformin versus Vitamin D in improving symptoms of depressed mood in polycystic ovary syndrome.
- Conditions
- PCOS, Depression, Vitamin D Deficiency, Insulin Resistance
- Trial name
- MINDD (NCT03380091)
- Testing
- Metformin, Vitamin D
- Where
- United States
- Volunteers
- 5 people, healthy volunteers welcome
- Sponsor
- University of California, San Francisco
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
Musculoskeletal Pain
Vitamin D to ENhance TraUma REcovery
The main objective of this study is to determine whether the administration of a single dose of Vitamin D in the Emergency Department following a motor vehicle collision can improve musculoskeletal pain severity as well as reduce…
- Trial name
- VENTURE (NCT05458024)
- Testing
- Vitamin D 2
- Where
- 4 sites in United States
- Volunteers
- 71 people, healthy volunteers welcome
- Sponsor
- University of North Carolina, Chapel Hill
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
Safety of Vitamin D Supplementation in Older Persons
This study will evaluate the safety over 6 months of two different doses of vitamin D (cholecalciferol) in men and women age 65 and older. It will also evaluate if supplementation with vitamin D improves physical performance.
- Trial name
- NCT00681590
- Testing
- cholecalciferol (vitamin D)
- Where
- United States
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- University of Miami
Preeclampsia
Combined Antioxidant and Preeclampsia Prediction Studies (CAPPS)
Preeclampsia is one of the most common complications of pregnancy and is characterized by high blood pressure and protein in the urine. This can cause problems in the second half of pregnancy for both the mother and fetus.
- Trial name
- CAPPS (NCT00135707)
- Testing
- Dietary Supplement/Vitamins
- Where
- 16 sites in United States
- Volunteers
- 10,154 people, healthy volunteers welcome
- Sponsor
- The George Washington University Biostatistics Center
Vitamin d Deficiency
Blue Sky Study: Impact of Milk and Vitamin D for Child Growth and Health
This intervention study will address the impact of vitamin D fortified milk and vitamin D supplements on the growth, levels of vitamin D, insulin-like growth factor 1, growth hormone, academic attention, respiratory infections…
- Trial name
- BSS (NCT00886379)
- Testing
- Mongolian milk without vitamin D, Mongolian milk with vitamin D, UHT milk
- Volunteers
- 597 people, healthy volunteers welcome
- Sponsor
- Brigham and Women's Hospital
Vitamin D Deficiency
Personalized Vitamin D Supplementation in European and African Americans
The proposed study is a randomized, double-blind, controlled, multi-center clinical trial of six months of daily oral vitamin D3 (cholecalciferol).
- Trial name
- NCT02362269
- Testing
- Vitamin D
- Where
- 2 sites in United States
- Volunteers
- 169 people, healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Obesity, Insulin Resistance
Vitamin D Supplementation to Obese Chinese Males
Hypothesis: Oral Supplementation of Vitamin D can Reduce Hypersecretion of Parathyroid Hormone and Insulin Resistance in Obese Chinese Males.
- Trial name
- NCT01781169
- Testing
- Oral supplementation of vitamin D
- Where
- China
- Volunteers
- 43 people, healthy volunteers welcome
- Sponsor
- Shenzhen Center for Chronic Disease Control
Vitamin D Deficiency
Evaluation of Vitamin D Requirements During Pregnancy
The purpose of this study is to determine the effectiveness of vitamin D supplementation during pregnancy starting at the beginning of the second trimester.
- Trial name
- NCT00292591
- Testing
- cholecalciferol (vitamin D3), cholecalciferol
- Where
- United States
- Volunteers
- 501 people, healthy volunteers welcome
- Sponsor
- Medical University of South Carolina
Healthy Volunteers
Effect of Calcium 500 mg and Vitamin D3 1000 IU Chewable Tablet on Intestinal Calcium Absorption
The purpose of this study is to demonstrate that the intestinal absorption of calcium from a novel calcium carbonate-vitamin D3 chewable tablet formulation (calcium 500 milligrams (mg) and vitamin D3 1000 International Units…
- Trial name
- NCT02338713
- Testing
- Calcichew D3, Noncarbonated Water
- Where
- France
- Volunteers
- 27 people, healthy volunteers welcome
- Sponsor
- Takeda
Multiple Sclerosis, Relapsing-remitting
Pharmacokinetics of Vitamin D in Multiple Sclerosis and in Health
This is a pilot study of oral vitamin D supplementation to determine if patients with Multiple Sclerosis (MS) and healthy individuals attain a similar increase in serum 25-hydroxyvitamin D levels.
- Trial name
- NCT01667796
- Testing
- Vitamin D3
- Where
- 2 sites in United States
- Volunteers
- 57 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins University