View clinical trials related to Ascorbic Acid Deficiency.
Filter by:Objectives: investigators aim to study the effect of addition of vitamin C as a part of treatment in septic shock patients on: Hemodynamics, Inflammation status and ICU outcome. Subjects and methods: A prospective interventional randomized cohort study, was conducted on 150 consecutive patients who were admitted to the ICU with septic shock based on SIRS, SOFA and APACHE II. Treatment group (n=75) had given ascorbic acid (Vitamin C) parenterally 6gm daily and control group (n=75). Measuring the level of Vitamin C in all study population (normal range 50-70 μM/L) before and after period of 4 days.
Vitamin C is essential for numerous biological processes as it acts as a cofactor in various hydroxylation reactions, but also as a powerful antioxidant. As humans have lost the ability to synthetize Vitamin C, this micronutrient is found exclusively in the food, and more particularly in fresh fruits and vegetables. The term 'hypovitaminosis C' refers to a plasmatic Vitamin C concentration < 28 µmol/L. It encompasses two distinct situations, according to the severity of the deprivation: - A deeply lowered plasmatic concentration (< 11 µmol/L) is defined as 'Vitamin C deficiency'. The resulting condition is scurvy and its well-known haemorrhagic complications, very likely to be fatal. - A less low plasmatic concentration (11-27 µmol/L) is defined as 'Vitamin C depletion'. Symptoms are polymorphic and less suggestive, especially for elderly patients. Many studies suggest a chronic Vitamin C depletion may favour the occurrence of various conditions such as cognitive impairment, psychiatric disorders, cardio-vascular diseases, or certain cancers, thereby highlighting the involvement of Vitamin C in many biological processes. The epidemiology and risk factors of hypovitaminosis C in ageing populations are poorly documented. The few studies dealing with this question are mostly retrospective, including a low number of patients, and relying on an imperfect methodology. Despite these limitations, data suggest hypovitaminosis C could concern up to 50% of the hospitalized geriatric population. Despite this probably high prevalence, hypovitaminosis C is barely diagnosed and thus rarely supplemented. This is particularly true for the elderlies who are at risk high of being Vitamin C depleted. Moreover, several risk factors have been described to be associated with Vitamin C depletion or deficiency, sometimes both. But only a few of them have been validated for the geriatric population. Thus, there is a real need for a better understanding of hypovitaminosis C epidemiology and risk factors in the geriatric population, in order to diagnose earlier, more frequently, and more precisely these cases. It is important to note that an easy and safe supplementation exists (1 g of Vitamin C for 2 weeks). A better understanding of risk factors is also a key element to apply corrective measures on modifiable risk factors in order to prevent the recurrence of hypovitaminosis C. In the present research protocol, the investigators hypothesized hypovitaminosis C could concern half of the hospitalized geriatric patients in acute care units. The primary objective of this study is to evaluate the prevalence of hypovitaminosis C in a geriatric acute care unit, by using a prospective design and including a statistically sufficient number of patients. The secondary objectives are : - To determine in this population the prevalence of Vitamin C deficiency, - To determine in this population the prevalence of Vitamin C depletion, - To assess the statistical associations between hypovitaminosis C, deficiency, and depletion with already known or pertinent risk factors. - To follow adverse events with vitamin C supplementation in deficient patients.
Burn injury is marked by a large release of inflammatory mediators which disrupt the normal capillary barrier and cause a rapid shift of intravascular fluid into interstitial spaces, ultimately leading to shock and death. As such, adequate fluid management and resuscitation is critical for burn patients to prevent further cellular injury. Technologies and medical options such as cardiac output monitoring along with early tube feeding and vitamin C administration have developed slowly over the years. Effective management of the Systemic Inflammatory Response Syndrome response and metabolic derangement is crucial for the survival of burn patients. In particular, vitamin C administration has shown to significantly decreases early post-burn lipid peroxidation, reduce microvascular leak of fluid by preventing endothelial dysfunction, and decreases edema formation in burned tissue. Vitamin C is a cheap and widely available antioxidant which has been shown to significantly effective in positively impacting clinical outcomes in burn resuscitation. We aim to evaluate the efficacy of vitamin C in burns greater than 20% total body surface area on clinical outcomes such as length of hospital stay, total fluid requirements, and mortality.
Diarrheal disease is the second leading cause of death in children under five, althought it is both preventable and treatable. The causative factors of diarrheal diseases vary a lot from region to region (bacteria, viruses, parasites). Diarrhea is one of the main causes of malnutrition in children under five years of age. Inversely, nutritional deficiency, particularly vitamin C deficiency, can be a risk factor for diarrhea. The main objective of this study is to assess the impact of vitamin C deficiency on diarrheal infection in children aged 2 to 5 years in countries with a high diarrheal rate. This pilot case-control study will be conducted in metropolitan France, Africa and South America. This question will be addressed by comparing vitamin C levels in children with diarrhea, regardless of the infectious agent, to levels in age- and sex-matched controls.
To evaluate the difference between vitamin C in the form of oral liposomes and general vitamin C in a fixed period of time in plasma and urine.
Nausea and vomiting is a common complication of pregnancy and occurs in 70-80% of all pregnancies. The symptoms usually start 2-4 weeks after fertilization and peak between the 9th and 16th week of gestation. In the 22nd week of pregnancy, the symptoms usually resolve. In up to 10% of all pregnancies nausea and vomiting may persist until delivery, which is called emesis gravidarum. In 0.3-2% of all pregnancies, nausea and vomiting occur with a pathological intensity called hyperemesis gravidarum. The cause of nausea and vomiting during pregnancy is unknown, but it is believed that the stimulus is the placenta and not the fetus. Antihistamines have proven to be an effective therapy. Histamine is increasingly produced during pregnancy by mast cells in the endometrium and myometrium, but also by mast cells in the placenta and in the decidua. High expression of the histamine-producing enzyme histamine-decarboxylase (HDC) in the placenta and many histamine receptors at the feto-maternal transition in the decidua indicate a physiological role of the histamine during pregnancy. The antidote is diamine oxidase (DAO), which is produced in the decidua and trophoblast and breaks down histamine. DAO acts as a barrier to prevent excessive passage of histamine into the maternal and fetal circulation. DAO levels increase exponentially in the first 20 weeks of pregnancy to 1000 times the baseline before pregnancy. It has been shown that intravenous vitamin C significantly reduces blood histamine levels in both allergic and non-allergic disorders. Another study with the German Navy also proved that oral vitamin C administration can reduce nausea in seasickness. In an Australian study in 2016, it was shown that chewing gum was not inferior to ondansetron therapy in patients with postoperative nausea and vomiting (PONV). From the available literature, we conclude that high maternal histamine concentrations in early pregnancy may be a cause of nausea and vomiting, whereas DAO is not sufficiently expressed by the transfer of histamine from the decidua and trophoblast into the maternal circulation prevent. Vitamin C has been identified in controlled clinical trials as a way to lower blood histamine levels. Furthermore, chewing gum was already described as a treatment option for nausea and vomiting. The aim of this study is therefore to test whether chewing gum containing vitamin C in pregnant women with emesis gravidarum has the potential to reduce nausea and vomiting and to evaluate a possible association between maternal human chorionic gonadotropin (hCG) or histamine levels and the severity of nausea and vomiting in early pregnancy as well as the influence of other factors such as thyroxine and pyridoxine.
The goal of this study is to perform a randomized clinical trial to assess the effects of vitamin C versus placebo on wound healing in mandibular fracture patients.
This is a retrospective chart review that will measure the impact on outcomes in septic shock patients who were resuscitated with a novel combination of medicines called iHAT (intravenous hydrocortisone -ascorbic acid-thiamine). Septic shock patients treated with this combination of drugs over the past two years will be compared with similar, concurrent septic shock patients who were not treated with this drug given that adoption of this therapy has been variable.
The clinical finding of skin rashes which appear after a vitamin C deficiency in Long Term Care Unit leads us to believe that the institutional diet could predispose to this kind of deficiency. Vitamin C has a key role into the struggle against oxidant stress and is involved into the connective tissue formation of the skin and the vascular endothelium. Vitamin C deficiency affects currently 15 to 25% of the elderly over 65 years old reaching 15% women and 20% men after 65 according to Johnston and Al. It concerns mainly the people in precarious situations (persons without fixed homes, ethyl-smoking persons) and elderly over 65 years. Hypovitaminosis C, defined by plasma level between 5 mg/L and 15 mg/L (28.41 to 85.23 µmol/L), is currently undiagnosed, especially with people with a risk of food deficiency and its prevalence increases with age. The treatment consists of a daily oral supplementation of 1 gram of vitamin C/d for 15 days. A minimum intake of 10 mg/D of vitamin C is required to prevent scurvy and maintain a total pool of 350 mg. A diet modification by a systematic intake of 2 glasses of fresh orange juice and/or the consumption of raw fruits and vegetables would prevent the appearance of scurvy.
The aim of this study is to evaluate the bioavailability of "Novo C Plus" vitamin C containing dietary supplement compared to licensed vitamin C medications. The novelty of this product is the liposomal formulation.