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Vitamin b12

Haiyan Wang, Linyi Li, Ling Ling Qin, Yanan Song, Josep Vidal-Alaball, Tong Hua Liu
BACKGROUND: Vitamin B12 deficiency is common, and the incidence increases with age. Most people with vitamin B12 deficiency are treated in primary care with intramuscular (IM) vitamin B12 . Doctors may not be prescribing oral vitamin B12 formulations because they may be unaware of this option or have concerns regarding its effectiveness. OBJECTIVES: To assess the effects of oral vitamin B12 versus intramuscular vitamin B12 for vitamin B12 deficiency. SEARCH METHODS: We searched CENTRAL, MEDLINE, Embase, and LILACS, as well as the WHO ICTRP and ClinicalTrials...
March 15, 2018: Cochrane Database of Systematic Reviews
Nader Nassiri, Farhad Assarzadegan, Mansoor Shahriari, Hamid Norouzi, Sara Kavousnezhad, Nariman Nassiri, Kourosh Sheibani
Introduction: Neurotrophic keratitis is a rare degenerative corneal disease caused by an impairment of trigeminal corneal innervation, leading to a decrease or absence of corneal sensation. Here, we present a case of neurotrophic keratopathy caused by B12 deficiency in a 34 years old man who had a progressive decrease in visual acuity and corneal involvement since 3 months before being referred to our ophthalmology clinic. Result and Discussion: Based on our clinical findings and with the diagnosis of B12 deficiency we started B12 treatment for the patient...
2018: Open Ophthalmology Journal
Young-Nam Kim, Ji Hyeon Hwang, Youn-Ok Cho
Information is limited on the current vitamin B12 status of South Koreans, including the results of biochemical indices. The objective of this study was to assess vitamin B12 status with vitamin B12 intake, major food sources, and plasma vitamin B12 concentration in Korean adults. We hypothesized that vitamin B12 intake and status would be different between sex and age groups. Three consecutive 24-hour recalls and fasting blood samples were obtained from healthy 20- to 64-year-old adults (N=141). The dietary vitamin B12 intake of the men (10...
February 2018: Nutrition Research
Bozidarka L Zaric, Milan Obradovic, Vladan Bajic, Mohamed A Haidara, Milos Jovanovic, Esma R Isenovic
Homocysteine (Hcy) is thiol group containing the amino acid, which naturally occurs in all humans. Hcy is degraded in the body through two metabolic pathways, while a minor part is excreted through kidneys. The chemical reactions that are necessary for degradation of Hcy require the presence of the folic acid, vitamins B6 and B12. Consequently, the level of the total Hcy in the serum is influenced by the presence or absence of these vitamins. An elevated level of the Hcy, hyperhomocysteinemia (HHcy) and homocystinuria are connected with occlusive artery disease, especially in the brain, the heart, and the kidney, in addition to venous thrombosis, chronic renal failure, megaloblastic anemia, osteoporosis, depression, Alzheimer's disease, pregnancy problems, and others...
March 12, 2018: Current Medicinal Chemistry
Meghan McGee, Shannon Bainbridge, Bénédicte Fontaine-Bisson
The fetal origins of health and disease framework has identified extremes in fetal growth and birth weight as factors associated with the lifelong generation of chronic diseases such as obesity, diabetes, cardiovascular disease, and hypertension. Maternal nutrition plays a critical role in fetal and placental development, in part by providing the methyl groups required to establish the fetus's genome structure and function, notably through DNA methylation. The goal of this narrative review is to describe the role of maternal dietary methyl donor (methionine, folate, and choline) and cofactor (zinc and vitamins B2, B6, and B12) intake in one-carbon metabolism and DNA methylation in the fetus and placenta, as well as their impacts on fetal growth and lifelong health outcomes, with specific examples in animals and humans...
February 26, 2018: Nutrition Reviews
Nuno Mendonça, Carol Jagger, Antoneta Granic, Carmen Martin-Ruiz, John C Mathers, Chris J Seal, Tom R Hill
Background: Folate and vitamin B12 are key to the correct functioning of one-carbon (1-C) metabolism. The current evidence on associations between 1-C metabolism biomarkers and mortality is inconclusive and generally based on younger or institutionalised populations. This study aimed to determine the associations between biomarkers of 1-C metabolism and all-cause and cardiovascular (CVD) mortality in the very old. Methods: The Newcastle 85+ Study is a prospective longitudinal study of participants aged 85 at recruitment living in Northeast England...
February 24, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
Tyler J Titcomb, Samantha T Schmaelzle, Emily T Nuss, Jesse F Gregory, Sherry A Tanumihardjo
BACKGROUND: Hidden hunger affects individuals who chronically consume an inadequate intake of at least 1 micronutrient and is associated with low dietary diversity. Little data are available on dietary intake or status assessment of B vitamins among preschool children in Zambia. OBJECTIVES: The aim of this study was to assess 24-hour dietary recall records obtained from Zambian children aged 3 to 7 years for B vitamin intake in relation to adequacy and change over time in the same community...
January 1, 2018: Food and Nutrition Bulletin
Golaleh Asghari, Alireza Khalaj, Maryam Ghadimi, Maryam Mahdavi, Hossein Farhadnejad, Majid Valizadeh, Fereidoun Azizi, Maryam Barzin, Farhad Hosseinpanah
BACKGROUND: Micronutrient deficiencies are major concerns after bariatric surgery, although these conditions often go undiagnosed pre-surgery. OBJECTIVE: To assess pre-surgery micronutrient status of an Iranian population of morbidly obese candidates of bariatric surgery in a cross-sectional study. METHODS: A cross-sectional analysis of 2008 candidates for bariatric surgery, aged 15-65 years, with either body mass index (BMI) ≥ 40 kg/m2 or 30 < BMI < 35 kg/m2 with a medical comorbidity was conducted...
March 8, 2018: Obesity Surgery
Mustafa Calik, Mehmet Salih Aktas, Emre Cecen, Ibrahim Etem Piskin, Hamza Ayaydın, Zuhal Ornek, Meryem Karaca, Abdullah Solmaz, Halil Ay
This study aimed to determine the relationship between serum vitamin B12 level and tension-type headache. The study groups consisted of 75 patients (40 females, 35 males) with headache and a control group of 49 healthy children (25 females, 24 males). Serum vitamin B12 level < 200 pg/ml was defined as deficient, and < 160 pg/ml as severely deficient. The serum vitamin B12 level was measured by the electrochemiluminescence (ECLIA) method. The serum vitamin B12 levels in the headache and control groups were 273...
March 8, 2018: Neurological Sciences
Antonia Fh Smelt, Jacobijn Gussekloo, Lynette W Bermingham, Elizabeth Allen, Alan D Dangour, Simone Jpm Eussen, Bernard Favrat, Lisette Cpgm De Groot, Frans J Kok, Timothy Kwok, Arduino A Mangoni, George Ntaios, Ondine Van De Rest, Eric Seal, Paul Vaucher, Petra Verhoef, Theo Stijnen, Wendy Pj Den Elzen
BACKGROUND/OBJECTIVES: Low vitamin B12 and folate levels in community-dwelling older people are usually corrected with supplements. However, the effect of this supplementation on haematological parameters in older persons is not known. Therefore, we executed a systematic review and individual participant data meta-analysis of randomised placebo-controlled trials (RCTs). SUBJECTS/METHODS: We performed a systematic search in PubMed, EMBASE, Web of Science, Cochrane and CENTRAL for RCTs published between January 1950 and April 2016, where community-dwelling elderly (60+ years) who were treated with vitamin B12 or folic acid or placebo...
March 8, 2018: European Journal of Clinical Nutrition
Iris Iglesia, Inge Huybrechts, Theodora Mouratidou, Javier Santabárbara, Juan M Fernández-Alvira, Alba M Santaliestra-Pasías, Yannis Manios, Alejandro De la O Puerta, Anthony Kafatos, Frédéric Gottrand, Ascensión Marcos, Stefania Sette, Maria Plada, Peter Stehle, Dénes Molnár, Kurt Widhalm, Mathilde Kersting, Stefaan De Henauw, Luis A Moreno, Marcela González-Gross
OBJECTIVES: To determine dietary patterns (DPs) and explain the highest variance of vitamin B6 , folate, and B12 intake and related concentrations among European adolescents. METHODS: A total of 2173 adolescents who participated in the Healthy Lifestyle in Europe by Nutrition in Adolescence study met the eligibility criteria for the vitamin B intake analysis (46% boys) and 586 adolescents for the biomarkers analysis (47% boys). Two non-consecutive, 24-h, dietary recalls were used to assess the mean intakes...
November 28, 2017: Nutrition
Agnieszka Wendołowicz, Ewa Stefańska, Lucyna Ostrowska
The diet is directly connected not only with the physical status but also with the functioning of the brain and the mental status. The potentially beneficial nutrients with a protective effect on the nervous system function include amino acids (tryptophan, phenylalanine, tyrosine, taurine), glucose and vitamins C, E, D and beta-carotene, B group vitamins (vitamin B12, vitamin B6, vitamin B4, vitamin B1) and minerals (selenium, zinc, magnesium, sodium, iron, copper, manganese, iodine). The presence of antioxidants in the diet protects against oxidative damage to nervous system cells...
2018: Roczniki Państwowego Zakładu Higieny
Martin Torp Rahbek, Rudolf Scheller, Mads Nybo, Jesper Ryg
We report two cases of transient significantly elevated plasma cobalamin (B12) in geriatric patients acutely admitted with fever, increased C-reactive protein and X-ray verified pneumonia. Extensive diagnostic workup did not reveal kidney or liver disease, neither any signs of cancer. Furthermore, none of the patients had received therapeutic B12 supplementation prior to admission. In both cases, plasma B12 normalized at an out-patient control few months later. We were not able to identify the reason for the initial B12 elevation in any of the patients, since none of the usually recognized causes were evident...
March 7, 2018: Scandinavian Journal of Clinical and Laboratory Investigation
Muhammed Keskin, Dilek Ural, Servet Altay, Onur Argan, Edibe Betül Börklü, Ömer Kozan
OBJECTIVE: Iron deficiency (ID) is the most common nutritional deficiency, and iron metabolism becomes further deteriorated in the presence of certain conditions, such as heart failure (HF). Atrial fibrillation (AF) has many similarities to HF, including a chronic inflammatory pathophysiology; however, the prevalence of ID and other hematinic deficiencies in AF patients have not been determined. METHODS: In this study, the prevalence of iron (serum ferritin <100 µg/L or ferritin 100-299 µg/L with transferrin saturation <20%), vitamin B12 (<200 pg/mL), and folate deficiency (<4...
March 2018: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
Derrick D Brown
Vegetarianism provides a catchall term for a variety of diets that exclude the consumption of some or all animal products. Contrary to popular claims, appropriately designed and managed vegetarian diets contain foods nutritionally sufficient for health, well-being, and physical performance. Vegetarian dancers can meet their protein needs from primarily or exclusively (vegan) plant-based sources when a variety of these foods are consumed daily and energy intake is adequate. However, the quality and timing of dietary intake is of key importance to meet the physical demands typical of high intensity, intermittent types of dance styles...
March 15, 2018: Journal of Dance Medicine & Science
Jovana Jeremic, Tamara Nikolic Turnic, Vladimir Zivkovic, Nevena Jeremic, Isidora Milosavljevic, Ivan Srejovic, Radmila Obrenovic, Snezana Jancic, Milena Rakocevic, Stevan Matic, Dragan Djuric, Vladimir Jakovljevic
This research is designed to test the hypothesis that elevated homocysteine (Hcy) levels in vivo, caused by a deficit in vitamin B complex, promote changes in cardiac function and redox status that lead to heart failure. In order to conduct the study, we used adult male Wistar albino rats (n=30; 4 weeks old; 100±15 g body weight). Hyperhomocysteinemia (HHcy) in these animals was achieved by dietary manipulation. For 4 weeks, the animals were fed with a standard rodent chow (control - CF), a diet enriched in methionine with no deficiency in B vitamins (i...
March 6, 2018: Clinical and Experimental Pharmacology & Physiology
Francisco Cardoso
No abstract text is available yet for this article.
March 6, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
Chadwick W Christine, Peggy Auinger, Amelia Joslin, Yuora Yelpaala, Ralph Green
BACKGROUND: In moderately advanced Parkinson's disease (PD), low serum vitamin B12 levels are common and are associated with neuropathy and cognitive impairment. However, little is known about B12 in early PD. OBJECTIVE: To determine the prevalence of low vitamin B12 status in early PD and whether it is associated with clinical progression. METHODS: We measured vitamin B12 and other B12 status determinants (methylmalonic acid, homocysteine, and holotranscobalamin) in 680 baseline and 456 follow-up serum samples collected from DATATOP participants with early, untreated PD...
March 6, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
L S Kornerup, C L Hvas, C B Abild, B Richelsen, E Nexo
BACKGROUND & AIMS: Bariatric surgery increases the risk of micronutrient deficiencies, including vitamin B12 (B12) deficiency. We analysed early changes in biomarkers of B12 status following bariatric surgery. METHODS: We prospectively included adult patients (n = 27) referred for either Roux-en-Y Gastric Bypass (RYGB) (n = 19) or Sleeve Gastrectomy (SG) (n = 8). Blood samples were drawn before surgery and 2 and 6 months following surgery for measurement of B12, holotranscobalamin (holoTC), and methylmalonic acid (MMA)...
February 15, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
Sanaa Kamal, Khaled K Aldossari, Dhalia Ghoraba, Sara Mahmoud Abdelhakam, Amgad H Kamal, Mohamad Bedewi, Leila Nabegh, Khaled Bahnasy, Tamer Hafez
Objective: Concomitant non-alcoholic fatty liver disease (NAFLD) and coeliac disease (CD) have not been adequately studied. This study investigated the frequency of CD among NAFLD patients and the clinicopathological and immunological patterns and outcome of concomitant NAFLD and CD. Design: This prospective longitudinal study screened patients with NAFLD for CD (tissue transglutaminase antibodies (TTGA); anti-TTGA and antiendomysial antibodies (EMA)). Patients with concomitant NAFLD and CD and patients with either NAFLD or CD were enrolled and followed...
2018: BMJ Open Gastroenterology
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