Clinical trials: Vitamin Deficiencies
Vitamin A Deficiency
Retinol Status in Preterm Infants and Mothers
Retinol and retinol binding protein were studied in the umbilical cord blood of 44 preterm infants with gestation age of < 30 weeks. Serum retinol and RBP levels were determined by enzyme-linked immunosorbent assay.
- Trial name
- NCT04780958
- Testing
- Serum retinol and RBP levels were determined by enzyme-linked immunosorbent assay.
- Where
- Turkey (Türkiye)
- Volunteers
- 44 people, healthy volunteers welcome
- Sponsor
- Ataturk University
Iron Deficiency
Effect of Vitamin C on Iron Absorption
Iron deficiency is a common health problem worldwide. Ferrous fumarate (a form of iron) is often added to foods in an effort to prevent iron deficiency.
- Trial name
- NCT00570895
- Testing
- Vitamin C
- Where
- United States
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- Baylor College of Medicine
Vitamin D Deficiency, Leiomyoma
Correlation Between Serum Vitamin D3 and Incidence of Uterine Leiomyoma
The aim of the current study is to evaluate the association between low serum vitamin D level and incidence of uterine leiomyoma in Egyptian women as the research hypothesis that low serum vitamin D is considered a risk factor…
- Trial name
- NCT05151393
- Testing
- Measuring vitamin D3 level
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Ain Shams University
Vitamin C Deficiency
The Effect of Vitamin C on GCF Total Oxidant Capacity in Smoker Patients With Periodontitis
The effect of vitamin C supplementation on GCF total oxidant capacity in smoker patients with periodontitis following non-surgical periodontal therapy.
- Trial name
- NCT05009355
- Testing
- Vitamin C
- Where
- Egypt
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Cairo University
Nutritional Status, Nutrient Deficiency
Adults Nutrition as a Protective or Health-risk Factor
To obtain up-to-date data on nutrient intakes in adults, a national dietary survey - the EU Menu study will be conducted during 12 consecutive months in 2017/2018, providing data on the consumption of foods and enabling the…
- Conditions
- Nutritional Status, Nutrient Deficiency, Micronutrient Deficiency, Vitamin D Deficiency
- Trial name
- NUTRIHEALTH (NCT03284840)
- Testing
- Assessement of nutritional status, Thyroid size
- Where
- 3 sites in Slovenia
- Volunteers
- 280 people, healthy volunteers welcome
- Sponsor
- Institute of Nutrition, Slovenia (Nutris)
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
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
Asthma, Vitamin D Resistant Rickets
Assessment Of Vitamin D Role In The Pathogenesis Of Asthma In Vitamin D Resistent Patients
Research Title: Evaluation of airway reactivity, allergy and inflammatory mediators in exhaled breath condensate in vitamin D resistant rickets.
- Trial name
- NCT01578824
- Testing
- Methacholine Challenge Test
- Where
- Israel
- Volunteers
- 26 people, healthy volunteers welcome
- Sponsor
- Rambam Health Care Campus
Vitamin D Deficiency, Obesity
Vitamin D and Adipose Tissue Inflammation
Chronic, low-grade adipose tissue inflammation is a major risk factor for type 2 diabetes mellitus. The cause of adipose tissue inflammation has remained largely unclear.
- Conditions
- Vitamin D Deficiency, Obesity, Type 2 Diabetes Mellitus, Intestinal Permeability
- Trial name
- NCT01477034
- Testing
- Vitamin D3
- Where
- United States
- Volunteers
- 18 people, healthy volunteers welcome
- Sponsor
- Fred Hutchinson Cancer Center
Vitamin D Deficiency
Safety and Bioefficacy of Vitamin D2 and Vitamin D3
The aim of this study is to investigate the bioavailability of vitamin D2 and D3 as measured by the increase of the specific hydroxy forms in serum (25(OH)D2 and 25(OH)D3, respectively, and by total 25(OH)D.
- Trial name
- NCT01503216
- Testing
- cholecalciferol, ergocalciferol
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Ulrike Lehmann
Vitamin D Deficiency, 25-Hydroxyvitamin D Concentration
Is Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena?
Several studies have demonstrated that D2 treatment is associated with a decrease in 25(OH)D3 level and therefore have proposed that D3 would be preferable in term of raising total 25(OH)D level.
- Trial name
- NCT03035084
- Testing
- Vitamin D3, Vitamin D2
- Where
- Saudi Arabia
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- King Faisal Specialist Hospital & Research Center
Overweight and Obesity, Vitamin D Deficiency
Magnesium and Vitamin D Supplementation and Cardiometabolic Outcomes
The purpose of this study is to investigate the effects of a combined vitamin D and magnesium supplementation on parathyroid hormone and cardiometabolic health in persons living with obesity.
- Conditions
- Overweight and Obesity, Vitamin D Deficiency, Magnesium Deficiency, Cardiovascular Risk Factor
- Trial name
- NCT03134417
- Testing
- Vitamin D and magnesium, Vitamin D
- Where
- United States
- Volunteers
- 109 people, healthy volunteers welcome
- Sponsor
- Drexel University
Vitamin D Deficiency
Effect of Vitamin D Supplementation on Health of Low Birth Weight Infants
The purpose of this study is to determine whether a weekly supplement of vitamin D to low birth weight term infants will reduce their mortality and hospital admissions and improve their immunity.
- Trial name
- DIVIDS (NCT00415402)
- Testing
- Vitamin D3
- Where
- India
- Volunteers
- 2,000 people, healthy volunteers welcome
- Sponsor
- Delhi University
Vitamin B12 Deficiency
Long-term Use of Proton Pump Inhibitors May Cause Vitamin B12 Deficiency in the Institutionalized Elderly
This study was designed to determine whether elderly residents of long term care facilitated who had been taking proton pump inhibitors (PPI) for more than 12 months were more likely to have vitamin B12 deficiency than residents…
- Trial name
- NCT00843453
- Testing
- blood collection, treatment (cyanocobalamin nasal spray)
- Where
- 2 sites in United States
- Volunteers
- 36 people, healthy volunteers welcome
- Sponsor
- University of Delaware
Vitamin D Deficiency
Clinical Assessment of Adjunctive Omega-3 Versus Vitamin D Daily Supplements on Active Periodontal Therapy With Stage II Grade B Periodontitis Patients
Clinical Assessment of Adjunctive Omega-3 Versus Vitamin D daily Supplements on Active Periodontal Therapy with Stage II Grade B Periodontitis Patients: A Randomized controlled clinical trial.
- Trial name
- NCT06654063
- Testing
- non-surgical periodontal therapy (SRP), non-surgical periodontal therapy (SRP)+ Omega-3, non-surgical periodontal therapy (SRP)+ Vitamin D
- Where
- Egypt
- Volunteers
- 72 people, healthy volunteers welcome
- Sponsor
- Cairo University
Vitamin B12 Deficiency, Folic Acid Deficiency
The Association Between Religious Origin and Age, and Vitamin B12 and Folic Acid Plasma Levels in Non Jewish Population in Western Galilee
Vitamin B12 deficiency is more widespread in the population than has been assumed so far. Since a deficiency in this vitamin can lead to irreversible neurological damage, early diagnosis is essential.
- Trial name
- NCT01297361
- Testing
- Blood Sample
- Where
- Israel
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Meir Medical Center
Vitamin D Deficiency
Vitamin D and HIV-Cardiovascular Disease in Children and Young Adults
The relationship of Vitamin D levels in children and young adults to atherosclerosis.
- Trial name
- NCT01410305
- Where
- 2 sites in United States
- Volunteers
- 290 people, healthy volunteers welcome
- Sponsor
- University Hospitals Cleveland Medical Center
Hypovitaminosis D
Changes in Serum Vitamin D Level After Different Loading Doses of Cholecalciferol
it is a clinical trial to observe increase in serum vitamin D level and clinical symptoms after 3 different doses of cholecalciferol given either intramuscularly or oral.
- Trial name
- NCT03504280
- Testing
- Cholecalciferol
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
Gestational Hypertension, Preeclampsia
B Vitamin Deficiency and Pregnancy Complications
This case-control study aims to investigate the association between B vitamins and gestational hypertension or preeclampsia.
- Trial name
- NCT05720650
- Testing
- No intervention
- Where
- China
- Volunteers
- healthy volunteers welcome
- Sponsor
- Westlake University