Clinical trials: Avitaminosis
Vitamin D Deficiency, Rickets
Vitamin D Supplementation in Breastfeeding Women
Adequate vitamin D is essential for proper infant growth and development. However, human milk is low in vitamin D, and most infants do not receive recommended supplementation.
- Conditions
- Vitamin D Deficiency, Rickets, Infant Nutrition Disorders
- Trial name
- NCT01240265
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Mayo Clinic
Vitamin D Deficiency, Covid19
The Relationship Between Vitamin D Levels, Inflammatory Parameters and Disease Severity of COVID-19 Infection
Vitamin D deficiency increases the susceptibility to respiratory virus infections and the severity of infections. Inflammation plays a key role in pathogenesis in COVID19 while identifying clinical course and prognosis…
- Trial name
- NCT04945577
- Testing
- Inflammatory Parameters, 25 OH Vitamin D Level
- Where
- Turkey (Türkiye)
- Volunteers
- 300 people
- Sponsor
- Fatih Sultan Mehmet Training and Research Hospital
Vitamin D Insufficiency, Vitamin D Deficiency
Vitamin D Levels and Vitamin D Education in Geriatric Patients
Vitamin D is important to maintain good health. Although it is found in foods and vitamins, many people still have low vitamin D levels.
- Trial name
- NCT00273611
- Testing
- Pharmacist Education about Vitamin D
- Where
- United States
- Volunteers
- 80 people
- Sponsor
- University of Colorado, Denver
Vitamin D Deficiency
Does Supplementing Vitamin D Deficiency Affect Fusion Healing Rates in Elective Foot and Ankle Surgery?
To assess if vitamin D status in the elective foot and ankle fusion population affects fusion healing categorically (fused vs. un-fused).
- Trial name
- NCT04450199
- Testing
- Vitamin D2
- Where
- United States
- Volunteers
- 25 people
- Sponsor
- Allegheny Singer Research Institute (also known as Allegheny Health Network Research Institute)
Obesity, Vitamin D Deficiency
Efficacy Of Ergocalciferol In Adults According To BMI
Vitamin D insufficiency is an increasing trend in the United States. According to the NHANES data collection there was a near doubling of patients with vitamin D deficiency in 10 years.
- Trial name
- NCT02435771
- Testing
- Ergocalciferols
- Where
- United States
- Volunteers
- 44 people, healthy volunteers welcome
- Sponsor
- Walter Reed National Military Medical Center
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
Vitamin D Deficiency Due to Chronic Kidney Disease
Vitamin D in Dialysis Patients - Diagnostic and Therapeutic Management
The goal of this observational study is to learn about the effects of cholecalciferol administration, according to guidelines for the general population, on laboratory parameters of Chronic Kidney Disease-Mineral and Bone…
- Trial name
- NCT06571344
- Testing
- Cholecalciferol
- Where
- Poland
- Volunteers
- 160 people
- Sponsor
- Medical University of Gdansk
Alkaline Phosphatase Deficiency, Vitamin D Deficiency
Serum Alkaline Phosphatase Levels In Healthy Turkish Children
Alkaline phosphatase (ALP), is a metalloenzyme of the plasma membrane. Serum ALP levels in children are closely related to age and gender, many commercial test kits being used in hospitals, are only offering reference values for…
- Trial name
- NCT06689709
- Testing
- Serum Alkaline Phosphatase Levels
- Volunteers
- 1,000 people, healthy volunteers welcome
- Sponsor
- Emine Hafize
Renal Osteodystrophy
Low Magnitude Mechanical Stimuli Effects on Bone Structure in ESRD
The proposed 6 month pilot and feasibility randomized trial will evaluate LMMS as an anabolic stimulus to bone in 30 adults on maintenance hemodialysis.
- Trial name
- NCT00364234
- Testing
- Low magnitude mechanical stimuli
- Where
- United States
- Volunteers
- 30 people
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Diabetes Mellitus, Non-Insulin Dependent, Non-Insulin Dependent
Study of the Effects of Vitamin C on Patients With Type 2 Diabetes
Diabetes is a disease characterized by decreased sensitivity to the action on insulin to promote sugar (glucose) use and blood vessel relaxation (vasodilation) in muscle.
- Trial name
- NCT00001870
- Testing
- Acetylcholine
- Where
- United States
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- National Center for Complementary and Integrative Health (NCCIH)
X-Linked Hypophosphatemia
Efficacy and Safety of Burosumab Versus Oral Phosphate and Active Vitamin D Treatment in Pediatric Patients With XLH
The primary objective of this study is to evaluate the effect of KRN23 (burosumab) therapy in improving rickets in children with XLH compared with active control (oral phosphate/active vitamin D).
- Trial name
- NCT02915705
- Testing
- burosumab, Oral Phosphate Supplement, active vitamin D
- Where
- 16 sites in United States, Australia and 5 more
- Volunteers
- 61 people
- Sponsor
- Kyowa Kirin, Inc.
Psoriasis Vulgaris, Vitamin D Deficiency
Efficacy of Vitamin D3 for the Treatment of Psoriatic Patients With Vitamin D Deficiency and Insufficiency
The purpose of this research is to study whether vitamin D supplement can improve clinical outcome (PASI score) in psoriasis vulgaris with vitamin D insufficiency and deficiency.
- Trial name
- NCT01339741
- Testing
- Vitamin D3
- Where
- Thailand
- Volunteers
- 30 people
- Sponsor
- Chulalongkorn University
Vitamin D Deficiency
Vitamin D in Pediatric Crohn's Disease
Background: Crohn's disease (CD), a type of Inflammatory Bowel Disease (IBD), is a chronic relapsing inflammatory disorder of the digestive system.
- Trial name
- NCT01187459
- Testing
- Vitamin D
- Where
- 2 sites in Canada
- Volunteers
- 87 people
- Sponsor
- University of British Columbia
Vitamin D Deficiency
Inter-relationship Between Vitamin D Requirements and Calcium Intake in Older Adults
This winter-based placebo-controlled, single-dose vitamin D randomized controlled trial (RCT) aims to examine the impact of various levels of habitual calcium intake on dietary vitamin D requirements in older adults stratified by…
- Trial name
- VitD-Ca (NCT01990872)
- Testing
- Vitamin D3 (20 micrograms/day)
- Where
- Ireland
- Volunteers
- 125 people, healthy volunteers welcome
- Sponsor
- University College Cork
Endometriosis, Vitamin D Deficiency/Insufficiency
Analysis of Vitamin D and VDR Expression in Endometriosis: A Case-Control Study
The goal of this cross-sectional prospective matching study is to evaluate whether serum vitamin D levels and vitamin D receptor (VDR) expression are associated with the presence and severity of endometriosis in women of…
- Conditions
- Endometriosis, Vitamin D Deficiency/Insufficiency, Vitamin D Status
- Trial name
- NCT06289257
- Testing
- Vitamin D level, Vitamin D receptor
- Where
- Thailand
- Volunteers
- 108 people, healthy volunteers welcome
- Sponsor
- Khon Kaen University
Vitamin D Deficiency, Vitamin D Insufficiency
Efficacy and Safety of Calcifediol vs Placebo in Subjects With Vitamin D Deficiency
This is a randomised, double-blind, double-dummy, multicentre, dose-ranging clinical trial in subjects with vitamin D deficiency or insufficiency.
- Trial name
- WORFEROL (NCT04735926)
- Testing
- Calcifediol 75mcg, Calcifediol 100mcg, Calcifediol 125mcg
- Where
- 55 sites in Bulgaria, Czechia and 5 more
- Volunteers
- 674 people
- Sponsor
- Faes Farma, S.A.
Hypophosphatasia
Safety and Efficacy Study of Asfotase Alfa in Adolescents and Adults With Hypophosphatasia (HPP)
This clinical trial was conducted to study hypophosphatasia (HPP), a bone disorder caused by gene mutations or changes. These gene mutations cause low levels of an enzyme needed to harden bone.
- Trial name
- NCT01163149
- Testing
- asfotase alfa
- Where
- 3 sites in United States, Canada
- Volunteers
- 19 people
- Sponsor
- Alexion Pharmaceuticals, Inc.
Vitamin D Deficiency, Vitamin D Insufficiency
ALPCO 25(OH) Vitamin D CLIA Kit - Fresh Versus Frozen Serum and Plasma Stability Study
This study evaluates the stability of 25-hydroxyvitamin D [25(OH)D] measurements in human serum and plasma using the ALPCO 25(OH) Vitamin D CLIA Kit.
- Conditions
- Vitamin D Deficiency, Vitamin D Insufficiency, Healthy Volunteers
- Trial name
- NCT07565064
- Testing
- ALPCO 25(OH) Vitamin D CLIA Kit
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- American Laboratory Products Company
Vitamin D Deficiency
Prevalence and Consequences of Vitamin D Deficiency in Pregnant Women in Switzerland
The purpose of this study is to determine the prevalence of vitamin D deficiency among the population of pregnant women receiving prenatal care and giving birth at the investigators' clinic.
- Trial name
- PCVDDPWS (NCT02904720)
- Where
- Switzerland
- Volunteers
- 1,199 people, healthy volunteers welcome
- Sponsor
- Insel Gruppe AG, University Hospital Bern
Hypocalcemia, Vitamin D Deficiency
The Effect of Preoperative Oral Dexamethasone Supplementation on the Outcome of Thyroidectomised Patients.
Glucocorticoids are well known for their analgesic, anti-inflammatory, immunomodulatory and anti-emetic effects. Recovery time after thyroid surgery may depend on several factors, such as postoperative pain, nausea and vomiting…
- Conditions
- Hypocalcemia, Vitamin D Deficiency, Postoperative Complications, Postoperative Nausea
- Trial name
- Dexa (NCT04412694)
- Testing
- Dexamethasone oral tablet 8mg (Dexamethasone Krka tablets(8mg), Warsaw, Poland)., Preoparative blood laboratory tests, Postoperative laboratory blood tests at 6 hour
- Where
- Poland
- Volunteers
- 100 people
- Sponsor
- Medical University of Lodz