View clinical trials related to Vitamin B 12 Deficiency.
Filter by:The purpose of this study is to determine whether a 30 day beef intervention can improve peak cognitive performance in young, normally menstruating adult women. The control group will consume a daily portion of macronutrient equivalent vegetable source of protein.
In a retrospective study with existing values of vitamin B12 and holotranscobalamin 4 strategies are simulated and the results and costs are compared. Generally, cobalamin ist substituted by intramuscular administration. However, oral preparations are also available. Aims of the focus groups are to investigate the awareness of a (potential) deficiency and to identify a therapy for best adherence.
Supplementation with Iron and folate have been part of a worldwide strategy targeting anaemia and neural tube defects for many years. However, vitamin B12 deficiency has received much less attention. High prevalence of deficiency in mothers in the antenatal period and in their infants, has been documented. Multiple case series document the neurological consequences of severe deficiency and their reversal with B-12. Trials on the subject are limited and those available have either used an ineffective dose or for a short duration. Therefore, we propose this randomised controlled trial to compare the efficacy of two different doses (pharmacological and preventive) of maternal Vitamin B-12 supplementation in improving infant B12 deficiency and neurodevelopment. We propose to undertake a multi-centric trial in India and Nepal given the high prevalence of deficiency reported from these countries and to allow a wider socio-demographic spectrum (Pay-for-service hospital catering to middle income populace from India and a free-care public hospital catering to lower income groups from Nepal). We will recruit 720 vegetarian, pregnant women from the antenatal clinics of the Indian and Nepalese centres at their first antenatal visit. Elderly primi mothers, taking B12 supplementation, multiple gestations, chronic medical conditions, anticipating moving out of the city, treated for infertility or with known psychological illnesses will be excluded. In Stage 1, recruited mothers will be randomized into 2 equal groups (360 each). Group 1-Daily 250 μg Vitamin B12 supplementation. Group 2-Daily 50 μg Vitamin B12 supplementation. B-12 will be started in 1st trimester and continue up to 6 months post-partum. In Stage 2, the birth and post-delivery course of the new-born will be monitored and documented for any morbidity. At 9 months, the neurodevelopmental, complementary feeding and home environment will be assessed and infant B12 status will be determined. The two groups will be compared for the primary (neurodevelopment) and secondary outcomes (biochemical parameters in mother and infant). The results of this study will be used to generate scientific evidence on whether B-12 should be supplemented in vegetarian pregnant women with a view to preventing B-12 deficiency and its neurodevelopmental consequences in the infant.
Women of reproductive age are a high-risk population for anaemia and micronutrient deficiencies. Evidence supports the role of periconceptional nutrition in the development of adverse pregnancy complications. However, in India, there are limited population-based data to guide evidence-based recommendations and priority setting. The objective of this study is to conduct a population-based biomarker survey of anaemia and vitamin B12 and folate status in women of reproductive age as part of a periconceptional surveillance program in Southern India.
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. Peters Veterans Affairs Medical Center (Bronx, NY) BACKGROUND: Poor skin permeability precludes the use of transdermal route from being used in common clinical practice for rapid and precise administration of medications through intact skin that are expected to have a systemic effect. The researchers determined the relative effectiveness of an unconventional transdermal iontophoresis technique for the administration of Vitamin B12 (V.B12) under three different skin preparatory conditions. METHODS: During this study, Vitamin B12 (V.B12) was administered through the skin of volunteer human research subjects. Iontophoresis was used as transdermal medication delivery modality after pre-treatment of the skin in 3 different ways. The sequence of skin preparations was arranged in a random order for each subject. Method 1 was called "No Prep", serving as the control approach; method 2 was called "Oleic Acid" application to the skin for 40 minutes; and method 3 was hair "Epilation" (e.g. hair removal by plucking). Fifteen milligrams of aqueous solution of V.B12 was administered through intact, previously unused skin of an anterior thigh during all 3 tests. Chemoluminescence, on an automated laboratory reader Advia Centaur-XP, was used to determine the serum concentration of V.B12 prior to and after transdermal iontophoretic delivery. All 3 experiments were performed on the same day within an hour of each other. The subject's blood was drawn prior and 10 minutes after the 20-minute long sessions of transdermal V.B12 iontophoresis. We were able to calculate the increase in serum V.B12 concentration and based on estimated blood volume, the total quantity and percent dose delivered systemically.
Preoperative anaemia is common in surgery, with a prevalence between 10 and 50 %, and is an independent risk factor for morbidity and mortality. Anaemia is mostly the result of an inadequate erythropoiesis due to iron deficiency, lack of vitamin B12 or folate, and bone marrow diseases. Among the elderly, renal disease and chronic inflammation account for approximately one-third of all anaemia incidences. The aim of this study is to provide detailed data about the prevalence of preoperative deficiencies in iron, vitamin B12 and/or folate and the presence of underlying renal or chronic diseases in patients undergoing major surgery.
Women of reproductive age are at an increased risk of anemia and micronutrient deficiencies. Evidence supports the role of periconceptional nutrition in the development of neural tube defects and other pregnancy complications. Vitamin B12 deficiency is a risk factor for neural tube defects and may modify folate biomarkers that predict neural tube defect risk at the population level. There is an interest in mandatory fortification with vitamin B12 and folic acid for anemia and birth defect prevention. However, there are limited population-representative data needed to inform policy and guidelines. This randomized trial will be conducted to evaluate the efficacy of quadruple-fortified salt (QFS; iron, iodine, folic acid, vitamin B12) in 1,000 women and their households in Southern India.
Vitamin B12 plays a key role in the development and normal functioning of the brain and nervous system. Unborn and new-born infants derive their vitamin B12 stores almost entirely from maternal B12 stores. As such, infants who are born to vegetarian mothers and exclusively breast fed are at a high-risk of B12 deficiency. This is because the best sources of vitamin B12 are found in animal based or fortified foods (e.g. cheese, milk and eggs). Vitamin B12 deficiency is widely reported among antenatal mothers and children, particularly in Low and Middle Income Countries (LMICs) where these food sources are uncommon. So far, studies have shown that antenatal vitamin B12 deficiency in mothers may be associated with poorer neurodevelopment in their children. Furthermore, vitamin B12 supplementation during pregnancy and early lactation has been shown to increase maternal, breast milk, and infant levels of vitamin B12. Although existing literature documents several studies on maternal vitamin B12 supplementation, there is a lack of research on the causative effect of maternal vitamin B12 supplementation on infant development. This project, funded by the Medical Research Council (MRC), will undertake a multi-centric nutritional trial in Nepal and India, as these are two LMICs where high incidence of vitamin B12 deficiency is reported.
500 participants of the vegan/vegetarian congress VegMed are to be included, which should answer once (cross-sectional study) a medicine socio-behaviorist questionnaire on the topic "supplementation of critical nutrients in a plant-based diet" at the VegMed congress on 21/04/2018. The aim of the study is to understand how experts in this field behave and whether actions taken follow official recommendations.
Changes in homocysteine values after bariatric surgery remain controversially discussed. This is the first comprehensive summary to depict timeline changes in homocysteine levels following laparoscopic roux-en-Y gastric bypass.