Clinical trials: Vitamin C
Tinnitus
Effect of Audistim® Day/Night on Hearing Comfort and Patient Quality of Life of Patients With Chronic Tinnitus.
Tinnitus is a widespread problem that affects the quality of life of millions globally. Few treatments have been found to be effective for subjective tinnitus and to have a significant improvement on quality of life.
- Trial name
- TINNITY (NCT05300594)
- Testing
- Plant extracts, vitamins and mineral
- Where
- France
- Volunteers
- 110 people
- Sponsor
- CEN Biotech
Skin Inflammation
Broccoli Seed Extract and Skin Health
The primary objective of this study is to examine the influence of 4-weeks ingestion of TrueBroc®, (broccoli seed extract, BSE) with mustard seed powder (MSP) on improving skin health by evaluating skin physiological and…
- Trial name
- NCT05745636
- Testing
- Broccoli, mustard, vitamin C
- Where
- United States
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- Appalachian State University
Vitamin K Status
Vitamin K Supplementation Study in Healthy Volunteers (Aim 2B)
The overall purpose of this study is to determine how variation in the CYP4F2 gene modulates the synthesis of vitamin K-dependent clotting factors.
- Trial name
- NCT04450212
- Testing
- Phase I, Buccal Swab Collection for DNA Isolation, Phase II, Vitamin K (Vitacost) Supplementation
- Where
- United States
- Volunteers
- 106 people, healthy volunteers welcome
- Sponsor
- University of Washington
Healthy
Vitamin D Supplementation in Healthy Adults in Prolonged Endurance Exercise
The purpose of this study is to investigate the effects of vitamin D supplementation on biochemistry response and skeletal muscle synthesis in prolonged endurance exercise.
- Trial name
- NCT05781620
- Testing
- Vitamin D, Medium-chain triglycerides
- Where
- Taiwan
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Taipei Medical University
Vitamin D Deficiency
Vitamin D Supplementation in Pediatrics. Oral or Parenteral! D2 or D3
A study will be performed on Vitamin D deficient/ insufficient Egyptian children to compare the efficacy of oral and parenteral forms of Ergocalciferol and cholecalciferol in raising serum 25(OH) D levels in these subjects
- Trial name
- NCT06176157
- Testing
- vitamin D2, vitamin D3
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Ain Shams University
Treatment of Venous Thromboembolism in Cancer Patients
A Study to Gather Information About Rivaroxaban in Patients in Sweden With Cancer Who Also Have Thrombosis (OSCAR-SE)
This is an observational study in which patient data from the past on venous thromboembolism (VTE) in patients with cancer is studied.
- Trial name
- NCT05150938
- Testing
- Rivaroxaban (Xarelto, BAY59-7939), Low molecular weight heparin (LMWH), vitamin K antagonist (VKA)
- Where
- Sweden
- Volunteers
- 5,737 people
- Sponsor
- Bayer
Heart Failure, Iron-deficiency
Beneficial Effects of Vitamin D Combined With Oral Iron Supplementation in Patients With Chronic Heart Failure and Iron Deficiency
The goal of this randomized, controlled, open-label, interventional study is to evaluate whether, in patients with heart failure (HF) and iron deficiency (ID), the administration of vitamin D in combination with sucrosomial iron…
- Conditions
- Heart Failure, Iron-deficiency, Heart Failure, Systolic, Heart Failure NYHA Class II
- Trial name
- VICTORID-HF (NCT05702970)
- Testing
- Sucrosomial iron, Vitamin D, Ferric Carboxymaltose 50 MG/ML
- Volunteers
- 258 people
- Sponsor
- University of Padova
Bone Health
An Intervention Study to Investigate the Effect of B-vitamin Supplementation for 2-years on Bone Health
An intervention study to investigate the effect of B-vitamin supplementation for 2-years on bone health. This is a dual centre (UCD and University of Ulster) 2-year randomised, placebo controlled, double blind intervention.
- Trial name
- Opti-Age (NCT03892395)
- Testing
- B-vitamin supplementation on bone health, Control group; Vitamin D, a daily capsule containing 10 µg/day vitamin D
- Where
- Ireland
- Volunteers
- 240 people, healthy volunteers welcome
- Sponsor
- University College Dublin
Migraine, Migraine;Menstrual
Oral Contraceptive Pill Compared With Vitamin E in Women With Migraine
Open-label randomized controlled trial to study the efficacy of continuous daily use of ethinylestradiol/levonorgestrel (30/150 µg/day) compared with vitamin E (400 IU/day) in the treatment of women with menstrually-related and…
- Trial name
- WHATT (NCT04007874)
- Testing
- Ethinylestradiol/levonorgestrel, Vitamin E
- Where
- Netherlands
- Volunteers
- 360 people
- Sponsor
- Leiden University Medical Center
Respiratory Tract Infections, Covid19
Vitamin D3 Supplementation to Prevent Respiratory Tract Infections
The Cooper vitamin D3 study is a randomized study investigating whether daily vitamin D3 supplementation can prevent respiratory tract infections, influenza-like illness and covid-19 in hospital workers.
- Conditions
- Respiratory Tract Infections, Covid19, Flu Like Illness
- Trial name
- NCT04596657
- Testing
- Vitamin D supplementation
- Where
- United States
- Volunteers
- 877 people, healthy volunteers welcome
- Sponsor
- The Cooper Health System
Metabolic Syndrome
The Role of Vitamin E Incorporated Oat Supplementation in Metabolic Syndrome (MetS) Patients
The objective of this study is to evaluate the effect of vitamin E incorporated oat supplementation among the metabolic syndrome (MetS) patients.
- Trial name
- NCT05604300
- Testing
- Vitamin E incorporated oat supplement, Oat supplement
- Where
- Malaysia
- Volunteers
- 81 people
- Sponsor
- Universiti Sains Malaysia
Vitamin D Deficiency, Critical Illness
Effects of Enteral Supplement Vitamin D Incritically Ill Patients
At present, there is no clinical reference data on how much the concentration of calcifediol in the blood increases after supplementing with vitamin D for Taiwanese ICU patients.
- Trial name
- NCT04292873
- Testing
- Vitamin D supplement
- Where
- Taiwan
- Volunteers
- 61 people
- Sponsor
- National Taiwan University Hospital
Osteopenia, Osteoporosis
Isoflavone Treatment for Postmenopausal Osteopenia.
The aim of the project is to execute a double-blind, parallel, randomized 12-month intervention trial on postmenopausal women with osteopenia (low bone mineral density), in order to determine the effects of daily intake of…
- Trial name
- NCT02174666
- Testing
- Red clover extract
- Where
- Denmark
- Volunteers
- 85 people
- Sponsor
- University of Aarhus
Heart Failure
Micronutrient Supplementation in Patients With Heart Failure
There is some evidence to suggest that patients with heart failure may have a reduced dietary intake of vitamins and essential minerals (micronutrients) and that this may worsen the function of the heart.
- Trial name
- MINT-HF (NCT01005303)
- Testing
- Forceval plus 50 micrograms Vitamin D3
- Where
- United Kingdom
- Volunteers
- 79 people
- Sponsor
- Belfast Health and Social Care Trust
Renal Insufficiency, Chronic, Kidney Failure, Chronic
Effect of Vitamin D Supplementation on Balance in CKD
Patients with end-stage renal disease on dialysis (ESRD5D) are 4-5x more likely to suffer from a fracture. Fractures can occur spontaneously but typically occur after a fall.
- Trial name
- NCT03710161
- Testing
- Vitamin D
- Where
- United States
- Volunteers
- 5 people
- Sponsor
- University of Nebraska
Breast Cancer
Vitamin D and Calcium Supplementation in Breast Cancer
This study aims at assessing the vitamin Dstatus in breast cancer patients who receive letrozole for more than two months and to evaluate effects of vitamin D3 and calcium supplementation on arthalgia caused by letrozole on these…
- Trial name
- NCT05523609
- Testing
- Letrozole 2.5mg, Letrozole + vitamin D3 and calcium
- Where
- Egypt
- Volunteers
- 40 people
- Sponsor
- Tanta University
Septic Shock
Blessing or Curse? Combined Vitamin Therapy in Non Viral Septic Shock.
Introduction: Septic shock leads to high morbidity and mortality in critically ill patients. Several lower-case scientific studies have supported the synergistic positive effect of vitamin C, thiamine, and hydrocortisone on…
- Trial name
- NCT06152458
- Testing
- Vitamin C
- Where
- Hungary
- Volunteers
- 43 people
- Sponsor
- University of Pecs
Aging, Osteoporosis
Determinants of Vitamin K Metabolism
The purpose of this study is to learn how the body responds to different amounts of vitamin K in the diet in order to understand the roles that vitamin K may have in the body.
- Trial name
- NCT00336232
- Testing
- Vitamin K
- Where
- United States
- Volunteers
- 59 people, healthy volunteers welcome
- Sponsor
- Tufts University
Diabetes Complications, Vitamin D Deficiency
Myocardial Function and Vitamin D Supplementation in Diabetes.
Vitamin D deficiency is recognized as a cardiovascular risk factor. Diabetic patients are of major risk for cardiovascular diseases and typically present with Vitamin D deficiencies.
- Conditions
- Diabetes Complications, Vitamin D Deficiency, Vitamin D Supplementation, Myocardial Dysfunction
- Trial name
- VitaDD (NCT03437421)
- Testing
- Vitamin D3 (cholecalciferol)
- Where
- France
- Volunteers
- 100 people
- Sponsor
- University of Avignon
Vitamin D3 Deficiency, Prematurity
Vitamin D and Health Outcomes in Preterm Born Population
Improved survival of very preterm newborn population during the last decades has challenged us neonatologists to study and improve nutritional practices including vitamin D (VitD) supplementation.
- Conditions
- Vitamin D3 Deficiency, Prematurity, Lung Diseases, Heart Rate Variability
- Trial name
- ViDePrePop (NCT04342078)
- Testing
- Vitamin D
- Where
- Finland
- Volunteers
- 87 people, healthy volunteers welcome
- Sponsor
- University of Oulu