Clinical trials: Cholecalciferol
Melanoma
The Response of Serum 25-Hydroxyvitamin D to Incidental Ultraviolet Light Exposure
1.1 To detect reproducible variations of serum 25-hydroxyvitamin D levels throughout the course of one year in relationship to objectively measured levels of ultraviolet exposure.
- Trial name
- NCT00832533
- Where
- United States
- Volunteers
- 9 people, healthy volunteers welcome
- Sponsor
- New Mexico Cancer Research Alliance
Hypertension, Vitamin D Deficiency
Effects of Vitamin D on Renin Expression in Hypertensive Patients
The cardiovascular effects of vitamin D therapy (in humans) have been documented only in patients with known vitamin D deficiency or hyperparathyroidism (a surrogate marker of inadequate vitamin D activity).
- Trial name
- NCT00585442
- Testing
- calcitriol
- Where
- United States
- Volunteers
- 12 people
- Sponsor
- University of Utah
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
Hypertensive Disorder of Pregnancy, Vitamin D Deficiency
Vitamin D Deficiency With Selected Vitamin D Receptor Gene Polymorphism in Gestational Hypertension
This study aim to look into the prevalence of Vitamin D deficiency among Malaysian pregnant women and its associated risk factors.
- Trial name
- NCT05659173
- Testing
- Blood taking
- Where
- Malaysia
- Volunteers
- 180 people, healthy volunteers welcome
- Sponsor
- Universiti Putra Malaysia
25-hydroxyvitamin D Serum Concentrations
Trial of Vitamin D Fortified Milk
Prevalence of VDD is high worldwide, even in sunbathed equatorial regions where it had not been suspected before. The most cost-effective method for reducing population-wide VDD is through fortification of commonly consumed…
- Trial name
- NCT01909622
- Testing
- Vitamin D, No vitamin D
- Where
- 2 sites in Colombia
- Volunteers
- 80 people
- Sponsor
- University of Michigan
Hepatitis C Infection, Vitamin D Deficiency
Effects of Vitamin D on Inflammation in Liver Disease
Chronic liver diseases are associated with inflammation. The investigators postulate that Vitamin D may modulate inflammation. Thus the investigators will study the effect of Vitamin D replacement in patients with Hepatitis C…
- Trial name
- NCT01754961
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 24 people
- Sponsor
- Veterans Medical Research Foundation
Diabetes, Low-intensity Chronic Inflammation
Vitamin D, C-reactive Protein and Insulin Resistance
Randomized, double blind, placebo-controlled clinical trial of vitamin D supplementation (cholecalciferol, 4,000 IU/day for 6 months, in 104 postmenopausal women with type 2 diabetes mellitus.
- Conditions
- Diabetes, Low-intensity Chronic Inflammation, Insulin Resistance
- Trial name
- NCT01019642
- Testing
- cholecalciferol
- Where
- Mexico
- Volunteers
- 104 people
- Sponsor
- Instituto Nacional de Salud Publica, Mexico
Vitamin D Serum Levels
Challenges in Achieving Adequate Vitamin D Status in the Adult Population - Part 1
Seasonal variations in vitamin D status will be determined on a cohort of Slovenian adults using longitudinal study design, and association between vitamin D status and different Caucasian phototypes, skin colour and melanin…
- Trial name
- VITAD/1 (NCT03818594)
- Where
- Slovenia
- Volunteers
- 338 people, healthy volunteers welcome
- Sponsor
- Institute of Nutrition, Slovenia (Nutris)
Hematopoietic Stem Cell Transplant
Ultra-high Dose Vitamin D for HSCT
This is a pilot study to investigate the effects of achieving adequate vitamin D levels via ultra-high-dose vitamin D supplementation given prior to hematopoietic stem cell transplant on transplant-related complications and…
- Trial name
- NCT03759262
- Testing
- Cholecalciferol
- Where
- United States
- Volunteers
- 33 people
- Sponsor
- Children's Hospital Los Angeles
Calcium Deficiency, Vitamin D Deficiency
Human Pharmacology Trial of Calcium-vitamin D3 Tablet in Healthy Participants
The purpose of this study is to demonstrate that the intestinal absorption of calcium from a newly developed calcium carbonate-vitamin D3 chewable tablet formulation increases the amount of calcium excreted in urine and decreases…
- Trial name
- Osteopro (NCT01639222)
- Testing
- Calcium 500 mg and Vitamin D3 800 IU, Low calcium meals
- Where
- Germany
- Volunteers
- 55 people, healthy volunteers welcome
- Sponsor
- Takeda
Pregnancy Related, Nutrition, Healthy
Use of Ritual Prenatal Multivitamins for Pregnancy
Prenatal multivitamin/multimineral supplements (MVI) provide important nutrition supplement to the diet of pregnant women to cover potential deficiencies and optimize nutrition status of both mom and baby, especially when the…
- Trial name
- NCT05673070
- Testing
- Ritual Epre Multivitamin-mineral supplement, control MVI
- Where
- 2 sites in United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- City University of New York
End Stage Renal Disease, Hemodialysis
Immune Effects of Vitamin D in Hemodialysis Patients
The purpose of this study to examine whether vitamin D can reduce the activation of the immune system during dialysis. When activated, the immune cells release certain substances, called cytokines, which can be measured from…
- Conditions
- End Stage Renal Disease, Hemodialysis, Inflammatory Response, Cardiovascular Disease
- Trial name
- NCT00686751
- Testing
- paricalcitol
- Where
- 3 sites in United States
- Volunteers
- 20 people
- Sponsor
- Renal Research Institute
Obesity, Overweight
Effect of Calcium/Vitamin D Supplementation on Body Weight and Fat Loss.
The aim of this study was to assess the effect of calcium/vitamin D supplementation (Caltrate 600 +D®) on body weight loss during a weight-reducing program
- Trial name
- NCT00353054
- Testing
- Caltrate® 600 + D, Weight loss intervention
- Where
- Canada
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Laval University
Fibromyalgia (FM), Vitamin B 12 Deficiency
Pre- and Post-Treatment Investigation of B12 and Folic Acid (Folate) Levels in Patients Receiving Antiepileptic (Anticonvulsant) Treatment for Fibromyalgia: Retrospective Study
Fibromyalgia is a rheumatological disorder characterised by chronic widespread body pain, second most common after osteoarthritis. The overall prevalence is 2-8% and it is more common in women.
- Conditions
- Fibromyalgia (FM), Vitamin B 12 Deficiency, Folic Acid Deficiency
- Trial name
- NCT07013305
- Where
- Turkey (Türkiye)
- Volunteers
- 104 people
- Sponsor
- Gaziosmanpasa Research and Education Hospital
Hyperparathyroidism, Secondary
Optimal Anemia Treatment in End Stage Renal Disease (ERSD)
Clinical study aimed at improving anemia management in End Stage Renal Disease Patient (ESRD) on maintenance Hemodialysis with evidence of Chronic Kidney disease Mineral Bone Disorder (CKD-MBD)
- Trial name
- OPTIMAL (NCT02273570)
- Testing
- standard care, Optimal (I. iPTH control: Zemplar®,Mimpara®; phosphorous control: Renvela®, Phoslo®, Osvaren®, Foznol®,Maalox®; calcium control: calcium and vitamin D
- Where
- Italy
- Volunteers
- 50 people
- Sponsor
- Azienda Ospedaliera Sant'Anna
Measure Absorption of Vitamin D in Blood
Bioequivalence Study on Vitamin D in Healthy Adults
The objective of this study is to evaluate and compare the bioequivalence between a single oral dose of vitamin D3 gummy vitamin versus vitamin D3 tablet in healthy adults.
- Trial name
- NCT03552653
- Testing
- Vitafusion Extra Strength Vitamin D
- Where
- United States
- Volunteers
- 31 people, healthy volunteers welcome
- Sponsor
- Church & Dwight Company, Inc.
Colorectal Cancer, Precancerous Condition
Vitamin D Supplement in Preventing Colon Cancer in African Americans With Colon Polyps
RATIONALE: Chemoprevention is the use of certain drugs to keep cancer from forming. The use of vitamin D may keep colorectal cancer from forming in patients with colon polyps.
- Trial name
- NCT00870961
- Testing
- cholecalciferol
- Where
- 2 sites in United States
- Volunteers
- 22 people
- Sponsor
- Northwestern University
Low Bone Mass
Resveratrol for the Prevention of Bone Loss in Postmenopausal Women
The purpose of this study is to examine whether daily supplementation of resveratrol would improve bone health in postmenopausal women.
- Trial name
- NCT06250283
- Testing
- Resveratrol
- Where
- United States
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- University of Delaware
Vitamin D Deficiency
Utility of a Urine Screening Tool for Vitamin D Deficiency in Infants and Toddlers
Background: Vitamin D plays a key role in calcium absorption in the gut and in skeletal development. Vitamin D deficiency is common, affecting an estimated one billion people worldwide, including developed countries.
- Trial name
- NCT01105689
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Nemours Children's Clinic
Type 1 Diabetes Mellitus
A Phase III Study to Investigate if the Study Drug Diamyd Can Preserve Insulin Production and Improve Glycemic Control in Patients Newly Diagnosed With Type 1 Diabetes
The objective of DIAGNODE-3 is to evaluate the efficacy and safety of three intranodal injections of 4 μg of Diamyd also known as retogatein compared to placebo, along with oral Vitamin D supplementation, to preserve endogenous…
- Trial name
- DIAGNODE-3 (NCT05018585)
- Testing
- Recombinant human glutamic acid decarboxylase (rhGAD65) formulated in Alhydrogel®, Colecalciferol 2000 IU
- Where
- 60 sites in United States, Czechia and 7 more
- Volunteers
- 321 people
- Sponsor
- Diamyd Medical AB
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