Clinical trials: Vitamin Supplementation
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
Hypogonadism
Vitamin D Treatment and Hypogonadism in Men
Low total testosterone (TT) is present in about 30% of men aged >60 years and in up to 7% of younger men. Male hypogonadism is associated with metabolic and cardiovascular diseases as well as with increased mortality.
- Trial name
- NCT01748370
- Testing
- Vitamin D supplementation in hypogonadal men, Vitamin D supplementation in eugonadal men
- Where
- Austria
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Iron-deficiency
Effect of Vitamin D3-fortified Fruit Juice on Iron Status in Women
The present study is designed to utilise vitamin D3 supplements that may potentially act as an iron absorption enhancer to improve iron status in the Malaysian child-bearing aged women with low iron stores.
- Trial name
- NCT04618289
- Testing
- Vitamin D3-fortified fruit juice supplement
- Where
- Malaysia
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- Universiti Putra Malaysia
Vitamin D Deficiency, Stress Fracture
Vitamin D3 Supplementation and Stress Fracture Occurrence in High-Risk Collegiate Athletes
The main objective of this study is to find a correlation between vitamin D deficiency and stress fracture occurrences in athletes who participate in high-risk activities.
- Conditions
- Vitamin D Deficiency, Stress Fracture, Athletic Injuries, Orthopedic Disorder
- Trial name
- NCT03395171
- Testing
- Cholecalciferol (Vitamin D3)
- Volunteers
- 118 people, healthy volunteers welcome
- Sponsor
- Prisma Health-Midlands
Gut Microbiome, Sport Performance
The Effect of Probiotics and Vitamin D Supplementation on Sport Performance in MMA Athletes.
The probiotics supplementation seems to be safety way to optimize the intestinal microbiota composition and thus modulate the immune system and reduce oxidative stress.
- Trial name
- NCT04759729
- Testing
- Probiotic and vitamin D
- Where
- Poland
- Volunteers
- 25 people, healthy volunteers welcome
- Sponsor
- Medical University of Gdansk
Obesity
Trial to Assess Response to Oral Vitamin D3 Supplementation in Obese Individuals
This study is an extension of an earlier study of vitamin D supplementation conducted on normal weight individuals by Dr. John Aloia of the Bone Mineral Research Division at Winthrop University Hospital.
- Trial name
- NCT00960037
- Testing
- Oral vitamin D3
- Where
- United States
- Volunteers
- 57 people, healthy volunteers welcome
- Sponsor
- Winthrop University Hospital
Vitamin D Deficiency
Effects of Vitamin D Supplementation on Immune Function in Infants
Current study shows that vitamin D deficiency might affect human's immune function. Although breast milk is the best food of infants, however the vitamin D content in breast milk is low.
- Trial name
- NCT04461665
- Testing
- vitamin D
- Where
- Taiwan
- Volunteers
- 59 people, healthy volunteers welcome
- Sponsor
- Shih Chien University
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
COVID-19
Vitamin D for COVID-19 Trial
The Vitamin D for COVID-19 Trial (VIVID) is a randomized, placebo-controlled clinical trial in 2024 men and women from across the U.S. and Mongolia to investigate whether taking a daily dietary supplement of vitamin D vs.
- Trial name
- VIVID (NCT04536298)
- Testing
- vitamin D
- Where
- United States
- Volunteers
- 2,024 people, healthy volunteers welcome
- Sponsor
- Brigham and Women's Hospital
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 D Deficiency
Safety of Vitamin D Supplementation in Older Persons
This study will evaluate the safety over 6 months of two different doses of vitamin D (cholecalciferol) in men and women age 65 and older. It will also evaluate if supplementation with vitamin D improves physical performance.
- Trial name
- NCT00681590
- Testing
- cholecalciferol (vitamin D)
- Where
- United States
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- University of Miami
Mortality, Morbidity
Impact of the WHO Recommended Vitamin A Supplementation at Immunisation Contacts
High-dose vitamin A to children above 6 months of age reduces all-cause mortality by 23-30%. The WHO recommends vitamin A supplementation (VAS) with the first vaccine after 6 months of age.
- Trial name
- NCT00514891
- Testing
- Vitamin A
- Where
- Guinea-Bissau
- Volunteers
- 9,500 people, healthy volunteers welcome
- Sponsor
- Bandim Health Project
Short Chain Fatty Acids Concentration in Stools, Gut Microbiota Diversity and Composition
The Effect of Vitamin C Supplementation on Gut Microbiota Composition and Function in Healthy Adults
The aim of this dietary intervention study is to explore how vitamin C affects the bacteria that live in our gut. Vitamins are essential nutrients found in fruits and vegetables.
- Trial name
- VitaGut (NCT07388121)
- Testing
- Moderate Vitamin C dose (200 mg), High-dose vitamin C supplementation (1000 mg), Habitual diet (run in period)
- Where
- United Kingdom
- Volunteers
- 23 people, healthy volunteers welcome
- Sponsor
- University of Glasgow
Stress Fracture, Injury
Vitamin D Supplementation in the Armed Forces
The study will comprise of an original investigation that will take the form of a prospective intervention (two matched groups) study.
- Trial name
- D_SAF (NCT03963128)
- Testing
- Supplementation Vitamin D3
- Where
- United Kingdom
- Volunteers
- 4,450 people, healthy volunteers welcome
- Sponsor
- University of Surrey
Pregnancy Outcome Among Vitamin D Supplementation During Pregnancy
Pregnancy Outcome and Vitamin D Level Among Vitamin D Supplementation During Pregnancy
To compared pregnancy outcome (Serum vitamin D level in mother and infant , preeclampsia rate, preterm birth rate, Infant birth weight, Infant length , APGAR score) between pregnant women who were given vitamin D supplementation…
- Trial name
- NCT04591847
- Testing
- Vitamin D 2
- Where
- Thailand
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Department of Medical Services Ministry of Public Health of Thailand
Village Children
Deworming and Enhanced Vitamin A Every 6 Month in Rural Indian Children Aged 1-6
Randomisation of 72 large rural areas ("blocks") into a 2 x 2 trial of six- monthly treatment of all village children aged 1-5 with albendazole(400mg), vitamin A (200000 iu), both or neither.
- Trial name
- NCT00222547
- Testing
- Vitamin A, Albendazole
- Where
- India
- Volunteers
- 720,000 people, healthy volunteers welcome
- Sponsor
- University of Oxford
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
Immune Tolerance
Vitamin D Supplementation and Regulatory FoxP3+ T Cells in the GUT
In this pilot study the investigators aim to investigate the effects of vitamin D supplementation on regulatory FoxP3+ T cells in the gastrointestinal mucosa in healthy women and men.
- Trial name
- NCT01538485
- Testing
- Cholecalciferol
- Where
- Austria
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Vitamin D, Gestational Diabetes
Vitamin D Supplementation for the Prevention of GDM
This study was a double-blind multicenter randomized controlled study.
- Trial name
- NCT05208827
- Testing
- Vitamin D3
- Where
- China
- Volunteers
- 1,600 people, healthy volunteers welcome
- Sponsor
- Women's Hospital School Of Medicine Zhejiang University
Prediabetes, Prehypertension
Prediabetes, Prehypertension and Vitamin D Supplementation - A Practice Based Clinical Intervention Pilot Study
This randomized, double-blind, placebo-controlled, multi-site study is to reverse modest elevations of fasting blood sugar (prediabetes) and resting blood pressure(Prehypertension) or both co existing prediabetes and…
- Trial name
- NCT01425424
- Testing
- Vitamin D supplementation
- Where
- 7 sites in United States
- Volunteers
- 18 people, healthy volunteers welcome
- Sponsor
- Pennington Biomedical Research Center