Clinical trials: Vitamin A Deficiency
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
Iron Deficiency, Anemia; Deficiency, Nutritional, With Poor Iron Absorption
A Study to Investigate the Effect of Vitamin D3 Supplementation on Iron Status in Iron Deficient Women
Iron is one of the most vital elements in humans as it plays a role in physiological functions such as transferring and storing oxygen, transporting electrons and catalysing numerous reactions, from oxidative metabolism to…
- Conditions
- Iron Deficiency, Anemia; Deficiency, Nutritional, With Poor Iron Absorption, Vitamin D Deficiency
- Trial name
- NCT02714361
- Testing
- Vitamin D3 supplement
- Where
- United Kingdom
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- University of Chester
Vitamin D Deficiency
Vitamin D Among Young Adults: an Intervention Study Using a Mobile 'App'.
The purpose of this study is to examine whether a behavioural intervention changes attitudes, knowledge, intake or blood levels of vitamin D in young adults.
- Trial name
- NCT02118129
- Testing
- an educational video, wait listed
- Where
- Canada
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- University of Guelph
Hypovitaminosis, Vitamin C Abnormal
Vitamin C 4 Care Homes
Older people in care homes are one of the most vulnerable groups with respect to risk, morbidity and mortality of severe coronavirus disease-2019 (COVID-19).
- Trial name
- VITA-C4CARE (NCT05122481)
- Testing
- Vitamin C
- Where
- United Kingdom
- Volunteers
- healthy volunteers welcome
- Sponsor
- University of Aberdeen
Vitamin A Deficiency, Iron-deficiency
Impact of Food-to-Food Fortified Cereal Products on Diet Quality in Eldoret, Kenya
The overall hypotheses is that a product designed with optimized nutritional characteristics, based on consumer preferences and leveraging local nutrient dense ingredients, can successfully deliver nutrition through sustainable…
- Trial name
- KenyaMPS (NCT05882682)
- Where
- Kenya
- Volunteers
- 1,800 people, healthy volunteers welcome
- Sponsor
- Purdue University
Vitamin D Deficiency
A Comparative Dissolution and Absorption Study of an Orodispersible Powder, Chewable Tablet and Soft Gel Capsule Vitamin D3 Supplementation
This is an open-labelled, randomized controlled clinical trial aimed to compare the pharmacokinetics of an orodispersible vs a soft gelatin vitamin supplementation in vitamin D deficient healthy adults.
- Trial name
- NCT05706259
- Testing
- Soft gelatin 200000 IU vitamin D3 capsule, Orodispersible (sachet) 200000 IU vitamin D3
- Where
- Pakistan
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Liaquat University of Medical & Health Sciences
Vitamin D Deficiency
Bioavailability of Vitamin D Encapsulated in Casein Micelles, Compared to Its Bioavailability in a Synthetic Emulsifier Currently Used for Supplementation and Enrichment.
Background: Vitamin D3 (VD) is an oil soluble vitamin formed in the skin during exposure to UV light. It is essential for bone and calcium metabolism, insulin reactivity, immune system etc.
- Trial name
- VD (NCT01807845)
- Testing
- enriched skimmilk with VD, Skimmilk enriched with VD wherein the VD will be emulsified using Tween 80
- Where
- Israel
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Rambam Health Care Campus
Vitamin D Deficiency
Effect of Vitamin D Oral Supplements on 25 OH Vitamin D Levels
Vitamin D deficiency is common world wide. 25 OH vitamin D level is the best indicator of vitamin D status. Vitamin D supplements are available as vitamin D2 or D3, in small daily or large weekly/monthly doses.
- Trial name
- NCT01170494
- Testing
- ergocalciferol 2000 IU orally, daily, ergocalciferol 25000 IU oraly every 2 weeks, ergocalciferol 50000 IU orally every 4 weeks
- Where
- Saudi Arabia
- Volunteers
- 279 people, healthy volunteers welcome
- Sponsor
- King Faisal Specialist Hospital & Research Center
Heart Failure
A Trial of Thiamin Supplementation in Patients With Heart Failure
Background: Patients with heart failure (HF) are at increased risk of developing thiamin deficiency (TD). Thiamin (vitamin B1) is required for the production of energy and therefore TD may contribute to the energy depletion…
- Trial name
- NCT00959075
- Testing
- Vitamin B1
- Where
- Canada
- Volunteers
- 70 people, healthy volunteers welcome
- Sponsor
- Unity Health Toronto
Diarrhoea
Causes of Rotavirus Vaccine Failure in Zambian Children
Zambia recently introduced routine infant immunization against rotavirus - the most important cause of severe gastroenteritis and diarrhoea mortality in children.
- Trial name
- NCT01886833
- Where
- Zambia
- Volunteers
- 420 people, healthy volunteers welcome
- Sponsor
- Centre for Infectious Disease Research in Zambia
Neoplasms, Antioxidants
Oxidoreductive Balance and Lysosomal Activity in Cancer Patients.
The research aims to determine the parameters of oxidative stress and inflammatory processes and compare these parameters with the image obtained using positron emission tomography (PET) with 2-deoxy-2-[fluorine-18]fluoro…
- Conditions
- Neoplasms, Antioxidants, Oxidative Stress, Lipid Peroxidation
- Trial name
- NCT03470857
- Testing
- Patients
- Where
- 3 sites in Poland
- Volunteers
- 83 people, healthy volunteers welcome
- Sponsor
- Nicolaus Copernicus University
Anemia, Vitamin D Deficiency
Evaluate the Change in Iron, Vitamin D, and C-Reactive Protein Level (CRP) in a 12 to 24 Week Period
The purpose of this study is to observe changes in iron status and vitamin D status during a 12-24 week supervised training program, specifically males and females between the ages of 30 and 50 years old.
- Trial name
- NCT01328704
- Where
- United States
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Avera McKennan Hospital & University Health Center
Vitamin D Deficiency, Respiratory Tract Infections
Vitamin D Supplementation for the Prevention of Acute Respiratory Infections: a RCT in Young Finnish Men
Vitamin D intervention effects on the prevention of acute respiratory tract infections among Young Finnish Men
- Trial name
- NCT05014048
- Testing
- Vitamin D3
- Where
- Finland
- Volunteers
- 231 people, healthy volunteers welcome
- Sponsor
- Tampere University
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
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, 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
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
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
Iron Deficiency, Vitamin A Deficiency
Nutritional Status and Bouillon Use in Northern Ghana
This pilot aims to generate data that are critical for informing the design of a planned, more detailed study to evaluate the effect of multiple micronutrient (MN)-fortified bouillon cube on biomarkers of nutrient status of women…
- Conditions
- Iron Deficiency, Vitamin A Deficiency, Vitamin B 12 Deficiency, Folate Deficiency
- Trial name
- NCT04632771
- Testing
- N/A (observational study)
- Where
- Ghana
- Volunteers
- 995 people, healthy volunteers welcome
- Sponsor
- University of California, Davis