Clinical trials: Vitamin A Deficiency
Hypovitaminosis D
Comparing a Novel Phototherapy Kiosk to Oral Vitamin D Supplementation
The purpose of this project is to demonstrate the capability of a standing phototherapy kiosk (SPK) to stimulate cutaneous vitamin D3 and subsequent production of 25 Hydroxyvitamin (OH) D safely and as efficiently as an oral…
- Trial name
- NCT04556136
- Testing
- Standing Phototherapy Kiosk, D3 Oral supplement
- Where
- United States
- Volunteers
- 106 people, healthy volunteers welcome
- Sponsor
- Madigan Army Medical Center
Hypovitaminosis, Vitamin A Deficiency
Impact of Maternal Supplementation With Dual Megadose of Vitamin A
The purpose of this study is to evaluate the effect of maternal supplementation with 400,000 IU of oral retinol palmitate in the post-partum, the nutritional situation of the binomial mother-child, on growth and morbidity of…
- Trial name
- NCT00742937
- Testing
- vitamin A
- Where
- Brazil
- Volunteers
- 239 people, healthy volunteers welcome
- Sponsor
- Instituto Materno Infantil Prof. Fernando Figueira
Healthy
Assessment of the Efficacy of Vitamin D-fortified Bread in Healthy Adults
The aim of this study is to evaluate the efficacy of daily intake of fortified bread with vitamin D on serum 25-hydroxyvitamin D level, glycemic and lipidemic status in healthy subjects compared to vitamin D supplement.
- Trial name
- NCT02516254
- Testing
- fortified bread, supplement
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- National Nutrition and Food Technology Institute
Vitamin D Deficiency, Cardiometabolic Risk Factors
Comparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D Levels
This study aimed to compare the effects between sunlight exposure and oral vitamin D supplementation on serum 25-hydroxyvitamin D concentration and metabolic markers in Korean young adults.
- Trial name
- NCT03310242
- Testing
- Sunlight Exposure, Vitamin D Supplementation
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Seoul National University Hospital
Vitamin D Deficiency
Vitamin D Status and Its Influencing Factors in Zhejiang Province: A Multicenter Cross-Sectional Study
Vitamin D deficiency is a global public health problem, with an estimated 1 billion people affected worldwide, and large-scale systematic data for Zhejiang Province remain scarce.
- Trial name
- NCT07866391
- Where
- 2 sites in China
- Volunteers
- 10,000 people, healthy volunteers welcome
- Sponsor
- First Affiliated Hospital of Zhejiang University
Vitamin D Deficiency
Vitamin D in Systemic Sclerosis Patients With Periodontitis
Vitamin D has been considered to possess anti-inflammatory and antimicrobial activity which may be a link for the known interaction of Systemic Sclerosis (SSc) and coronary heart disease (CHD).
- Trial name
- NCT04066842
- Testing
- Observation
- Where
- Italy
- Volunteers
- 168 people, healthy volunteers welcome
- Sponsor
- University of Messina
Vitamin D Deficiency, Alveolar Bone Loss
Vit D and Post-extractive Bone Turnover
The aims of the study was to correlate the extent of the dimensional alveolar bone changes after tooth extraction and contextual guided bone regeneration with serum vit D levels in 14 patients.
- Conditions
- Vitamin D Deficiency, Alveolar Bone Loss, Alveolar Bone Resorption
- Trial name
- NCT06412705
- Testing
- Tooth extraction, guided bone regeneration and dental implant
- Where
- Italy
- Volunteers
- 14 people, healthy volunteers welcome
- Sponsor
- Studio Odontoiatrico Associato Dr. P. Cicchese e L. Canullo
Vitamin D Deficiency
The Genetic Effects on Vitamin D Supplementation
Vitamin D is essential for skeletal growth and bone health, deficiency causes rickets and osteomalacia. In the UK 29% of adults have vitamin D deficiency. It is recommended all adults take 10µg vitamin D supplement daily.
- Trial name
- NCT05802433
- Testing
- Vitamin D3 supplement
- Where
- United Kingdom
- Volunteers
- 67 people, healthy volunteers welcome
- Sponsor
- St. Mary's University, Twickenham
Vitamin A Deficiency
Effect of Vitamin A Supplementation on Immune Responses in Human Neonates
Vitamin A supplementation (VAS) significantly reduces all-cause mortality when given after 6 months of age, but has a null or detrimental effect when given between 1-5 months.
- Trial name
- NNVAS (NCT01476358)
- Testing
- Vitamin A (retinyl palmitate).
- Where
- The Gambia
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- London School of Hygiene and Tropical Medicine
Folic Acid Deficiency
Folate-Rich Foods Improve Folate Status
This study evaluates the effects of folate-rich foods regarding improvement of folate status compared with folic acid supplement.
- Trial name
- Folatefood (NCT02373033)
- Testing
- Natural food folate, Folic acid, Apple juice
- Where
- Egypt
- Volunteers
- 57 people, healthy volunteers welcome
- Sponsor
- Mansoura University
Vitamin/Nutritional Deficiency, Neurobehavioral Manifestations
Walnuts, Long-Chain Polyunsaturated Fatty Acids and Adolescent Brain Development
Background: Adolescence is an important period for brain development as a result of increased synaptic plasticity. Omega-3 polyunsaturated fatty acids (n-3 PUFAs) are essential nutrients for brain development and protection…
- Trial name
- WALNUTs (NCT02590848)
- Testing
- Walnut intake
- Where
- Spain
- Volunteers
- 730 people, healthy volunteers welcome
- Sponsor
- Barcelona Institute for Global Health
Acute Myeloid Leukemia, Vitamin D Deficiency
Vitamin D Effect on A Disintegrin-like And Metalloprotease Thrombospondin1 Motif 13& Interleukin 6 in Leukemia
A Disintegrin-like And Metalloprotease with Thrombospondin type 1 motif 13 (ADAMTS13) deficiency was incriminated in poor prognosis, high probability of serious complications and mortality in acute myeloid leukemia (AML)…
- Conditions
- Acute Myeloid Leukemia, Vitamin D Deficiency, ADAMTS13, Interleukin 6
- Trial name
- NCT05149339
- Testing
- Cholecalciferol 2800 I.U. ml oral drops
- Where
- Egypt
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- Zagazig University
Macrocytic Anemia With Vitamin B12 Deficiency
Transdermal Iontophoresis of Vitamin B12 Under Three Different Skin Preparations
STUDY DESIGN: Phase I Clinical Trial The researchers set out to assess the effectiveness of transdermal iontophoretic administration of Vitamin B12 (V.B12) under three different skin preparatory conditions. SETTING: James J.
- Trial name
- NCT04027959
- Testing
- Vitamin B12
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- James J. Peters Veterans Affairs Medical Center
Iron Deficiency (Without Anemia), B12 Deficiency Vitamin
Hydroponic Fortification and Dietary App Effect on Nutrients Level (Harvest)
Veganism and vegetarianism have clear benefits where they have a lower risk of many health issues. However, they also have a higher risk of nutrients and vitamin deficiency such as iron and vitamin B12.
- Trial name
- NCT05740462
- Testing
- Recipes consumption, Hydroponic unit
- Where
- United Kingdom
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- Quadram Institute Bioscience
Infertility, Female, Infertility
Vitamin D and Polycystic Ovarian Syndrome (PCOS)
Primary Objectives: To evaluate the efficacy of metformin and Vitamin D supplementation on serum insulin and serum androgen levels (Total testosterone, Steroid Hormone Binding Globulin, Free Androgen Index) levels compared…
- Conditions
- Infertility, Female, Infertility, Vitamin D Deficiency
- Trial name
- NCT03989778
- Testing
- Vitamin D
- Where
- 2 sites in Pakistan
- Volunteers
- 84 people, healthy volunteers welcome
- Sponsor
- Aga Khan University
Vitamin D Deficiency
A Single Wintertime Dose of Vitamin D3 to Prevent Winter Decline in Vitamin D Status in Healthy Adults
The purpose of this study is to determine if a single dose of vitamin D administered orally in the fall will provide adequate vitamin D in healthy individuals for the duration of the winter, during which vitamin D levels are…
- Trial name
- NCT01924910
- Testing
- 250,000 IU cholecalciferol as single, oral dose
- Where
- United States
- Volunteers
- 28 people, healthy volunteers welcome
- Sponsor
- Emory University
Pneumonia, Vitamin D Deficiency
Kabul Vitamin D Supplementation Trial
Background: Pneumonia is the leading cause of childhood mortality, accounting for 19% of the 10.6 million deaths that occur each year1.
- Trial name
- NCT00548379
- Testing
- vitamin D
- Where
- 2 sites in Afghanistan
- Volunteers
- 3,048 people, healthy volunteers welcome
- Sponsor
- London School of Hygiene and Tropical Medicine
Vitamin A Deficiency, Vitamin A Toxicity
Liver and Bone Retinol Levels in Guatemalan Adolescents and Adults
Guatemala has enforced mandatory fortification of sugar with vitamin A (VA) since June 1974 and has led to a highly successful reduction in VA deficiency and associated disease. However, Ribaya-Mercado et al.
- Conditions
- Vitamin A Deficiency, Vitamin A Toxicity, Hypervitaminosis A
- Trial name
- GVAS (NCT04438200)
- Where
- 5 sites in Guatemala, United Kingdom
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Newcastle University
Osteopenia, Vitamin D Deficiency
Bone Health and Vitamin D Status
This study will compare and assess the prevalence of osteopenia and vitamin D deficiency as well as effects of TDF on the patients' bone among HIV positive and negative patients.
- Conditions
- Osteopenia, Vitamin D Deficiency, HIV Infection
- Trial name
- BHVD (NCT01634607)
- Where
- Thailand
- Volunteers
- 235 people, healthy volunteers welcome
- Sponsor
- Thai Red Cross AIDS Research Centre
Vitamin A Deficiency
The Efficacy of Pro-vitamin A Biofortified Cassava on Vitamin A Status in Nigerian Preschool Children
The study comprises an open-label randomized controlled trial investigating the efficacy of consuming a daily ration of pro-vitamin A biofortified cassava on vitamin A status of Nigerian children, aged 3-4 years old (n=200).
- Trial name
- CASSAVITA II (NCT02627222)
- Testing
- Pro-vitamin A biofortified cassava, White cassava
- Where
- Nigeria
- Volunteers
- 176 people, healthy volunteers welcome
- Sponsor
- Wageningen University