Clinical trials: Vitamin C
Oxidative Stress
Antioxidants Vitamins and Muscle Damage
Determine if acute supplementation with antioxidant vitamins (vitamin C and vitamin E) influences the muscle damage and fatigue caused after an acute session of eccentric training.
- Trial name
- Antioxidant (NCT05127928)
- Testing
- Dietary Supplement: Vitamin C and vitamin E
- Where
- Spain
- Volunteers
- 18 people, healthy volunteers welcome
- Sponsor
- Universidad Europea de Madrid
Enteric Hyperoxaluria
Gut Kidney Axis in Enteric Hyperoxaluria
40 subjects with a confirmed diagnosis of IBD or >6 months post-RYGB with a diagnosed USD event or kidney stone on imaging within the past three years and 40 healthy controls will be administered a high oxalate diet on Days 0-3…
- Trial name
- NCT05124886
- Testing
- Moderately High Oxalate (MOx) Diet
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- NYU Langone Health
Nutrient Deficiency, Age-Related Immunodeficiency
Milk Biofortification Promotes Health Benefits in Institutionalized Elderly
The project aims to study the effects of inclusion of sunflower oil, vitamin E and selenium in the diet of dairy cows on milk composition and the influence of modified milk on nutrition and health of elderly.
- Conditions
- Nutrient Deficiency, Age-Related Immunodeficiency, Vitamin E Deficiency, Selenium Deficiency
- Trial name
- NCT02980094
- Testing
- Milk Antioxidant group(A), Milk Oil group(O), Milk Antioxidant and oil(AO)
- Where
- Brazil
- Volunteers
- 132 people, healthy volunteers welcome
- Sponsor
- Eduardo Ferriolli
Hair Thinning
Viviscal Extra-Strength Formulation To Promote Hair Growth And Decrease Shedding In Women With Thinning Hair
The Viviscal Extra-Strength formulation is an oral food/dietary supplement specifically designed to promote hair growth for women suffering from temporary thinning hair.
- Trial name
- NCT02297360
- Testing
- Viviscal Extra-Strength Supplement
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Ablon Skin Institute Research Center
Frail Elderly Syndrome
Management of Frailty in Older Adults With Turmeric and Tulsi Supplements
The aim of this study is to determine the efficacy of turmeric and tulsi polyherbal formulation in the management of frailty in the elderly population.
- Trial name
- NCT03365310
- Testing
- C. longa, curcuminoids , Z. officianale, O. sanctum along with 200 ml of Milk, Standard of Care
- Where
- India
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Composite Interceptive Med Science
Cardiovascular Diseases, Cardiovascular Risk Factor
Local Antioxidant Therapy Vasoconstriction Effects in Different Races
Cardiovascular disease (CVD) afflicts nearly one-third of the adult population with all races and ethnicities represented in CVD prevalence.
- Conditions
- Cardiovascular Diseases, Cardiovascular Risk Factor, Vasoconstriction
- Trial name
- NCT03684213
- Testing
- Control (Norepinephrine), Norepinephrine + Ascorbic Acid, Norepinephrine + L-NAME
- Where
- United States
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- The University of Texas at Arlington
Bariatric Surgery Candidate, Vitamin Deficiency
Absorption of Transdermal Vitamins in Post Bariatric Surgery Patients
Patients undergoing bariatric surgery often develop new vitamin and/or mineral deficiencies or exacerbate prior deficiencies after surgery.
- Conditions
- Bariatric Surgery Candidate, Vitamin Deficiency, Mineral Deficiency
- Trial name
- NCT03360435
- Testing
- Patch MD MultiVitamin Plus patch
- Where
- United States
- Volunteers
- 99 people, healthy volunteers welcome
- Sponsor
- University of Florida
Hypoxia, Hypercapnia
Impact of NOS, COX, and ROS Inhibition on Cerebral Blood Flow Regulation
Elucidating cerebrovascular control mechanisms during physiologic stress may help identify novel therapeutic targets aimed at preventing or reducing the impact of cerebrovascular disease.
- Trial name
- NCT03066115
- Testing
- L-NMMA, Ketorolac, Ascorbic Acid
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- University of Wisconsin, Madison
Acne
Single-Blind Study Assessing the Use of a Topical Antioxidant With A Series of Laser Procedures to Reduce Sebum Production
This is a split-face, single-blind study assessing the use of an antioxidant serum with a series of acne laser treatments to reduce sebum production in healthy male and female subjects between the ages of 18 and 65 years…
- Trial name
- NCT06376110
- Testing
- Topical Antioxidant Serum, AviClear Laser
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Austin Institute for Clinical Research
Healthy
Bioavailability of Vitamin D in Cod Liver Oil and Multivitamin Tablets in Healthy Subjects in Norway
The main aim of the present study is to compare the bioavailability of vitamin D from cod liver oil and multivitamin tablets given to healthy individuals under the same conditions, as well as to study the influence of gender and…
- Trial name
- NCT01482689
- Testing
- Fish oil capsule (specially manufactured for the study), Multivitamin tablet of type: Vitaplex ABCD
- Where
- Norway
- Volunteers
- 74 people, healthy volunteers welcome
- Sponsor
- University of Oslo
Healthy
Safety and Tolerability of Kiddi® Pharmaton Fizz Effervescent Tablets in Children
Study to evaluate the tolerability and safety of Kiddi® Pharmaton Fizz effervescent tablets, in children of 6 to 14 years, comparing a given formula with an improved one with reduced mineral content (qualitatively equivalent to…
- Trial name
- NCT02184325
- Testing
- Kiddi® Pharmaton Fizz, effervescent tablets, Kiddi® Pharmaton Fizz, effervescent tablets: marketed formula, Comparator product
- Volunteers
- 96 people, healthy volunteers welcome
- Sponsor
- Boehringer Ingelheim
Skeletal Anomalies, Kidney Transplant; Complications
Evaluation and Management of Metabolic Bone Disease in Kidney Transplant Recipients
There is a well-documented increased risk for disordered mineral bone homeostasis in Kidney Transplant Recipients (KTRs) when compared to the general population, leading to a markedly increased risk for fragility fractures and…
- Trial name
- NCT03958409
- Testing
- measurements to evaluate metabolic bone disease, standard care
- Where
- United States
- Volunteers
- 8 people, healthy volunteers welcome
- Sponsor
- Yale University
Smoking
Oxidative Stress and Vitamin E Requirements
The purpose of this study is to determine if oxidative stress derived from cigarette smoking increases vitamin E requirements. The study will also assess the role of vitamin C in modulating vitamin E requirements.
- Trial name
- NCT00067899
- Testing
- Vitamin E with and without Vitamin C
- Where
- United States
- Volunteers
- 99 people, healthy volunteers welcome
- Sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Diabetes Mellitus, Type 1
Estrogen and Diabetes
Diabetes has recently been referred to as "the epidemic of the 21st century". The reason why women with type 1 diabetes have a 2-3 fold greater risk of cardiovascular disease (CVD) compared to men with type 1 diabetes is…
- Trial name
- NCT03436992
- Testing
- Antioxidant Cocktail, Resveratrol
- Where
- 2 sites in United States
- Volunteers
- 143 people, healthy volunteers welcome
- Sponsor
- Augusta 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
Iron Deficiency, Anemia
Iron Absorption From Complementary Food Fortificants (CFFs) and Acceptability of CFFs by Beninese Children
Iron deficiency (ID) is still a main public health problem in sub-Saharan Africa. Iron deficient children have an increased risk for anemia which is associated with adverse infant development that might be partly irreversible.
- Trial name
- NCT01321099
- Testing
- NaFeEDTA, Phytase, Vitamin C
- Where
- Benin
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Swiss Federal Institute of Technology
Increase in Blood Levels of Nicotinamide Adenine Dinucleotide (NAD+)
Open-label Study to Assess Increasing Levels of NAD+(Nicotinamide Adenine Dinucleotide)
The purpose of this study is to assess an effective single oral supplement or combination of oral supplements for increasing whole blood NAD+ levels.
- Trial name
- NCT03707652
- Testing
- Oral supplement A, Oral supplement B, Oral supplement C
- Where
- United States
- Volunteers
- 8 people, healthy volunteers welcome
- Sponsor
- Supplement Formulators, Inc.
Impacted Mandibular Third Molar
Does Vitamin C Improve Postoperative Healing
This randomized, split-mouth clinical trial investigates the effect of oral vitamin C supplementation on postoperative recovery following the surgical extraction of impacted mandibular third molars.
- Trial name
- NCT07012564
- Testing
- Vitamin C
- Where
- Turkey (Türkiye)
- Volunteers
- 56 people, healthy volunteers welcome
- Sponsor
- Hacettepe University
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
Cardiovascular Function in EMTs
Vascular Function and Oxidative Stress in Emergency Medical Responders
The goal of this clinical trial is to characterize blood vessel function and oxidative stress (a harmful condition that damages cells and tissues) in emergency medical technicians (EMTs).
- Trial name
- VF-EMT (NCT06985394)
- Testing
- Antioxidant cocktail
- Where
- United States
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- University of Delaware