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Vitamin B12.
Abstract The biosynthesis of B12, involving up to 30 different enzyme-mediated steps, only occurs in bacteria. Thus, most eukaryotes require an external source of B12, and yet the vitamin appears to have only two functions in eukaryotes: as a cofactor for the enzymes methionine synthase and methylmalonylCoA mutase. These two functions are crucial for normal health in humans, and in particular, the formation of methionine is essential for providing methyl groups for over 100 methylation processes. Interference with the methionine synthase reaction not only depletes the body of methyl groups but also leads to the ac...
Source: Advances in Food and Nutrition Research - February 27, 2018 Category: Nutrition Authors: Smith AD, Warren MJ, Refsum H Tags: Adv Food Nutr Res Source Type: research

Fatal folic acid toxicity in humans - Devnath GP, Kumaran S, Rajiv R, Shaha KK, Nagaraj A.
Folic acid is B-9 vitamin. Folic acid is prescribed commonly for pregnant women to prevent neural tube defects in the fetus, patients under chemotherapy, pernicious anemia and to reduce the risk of stroke and cardiovascular disease. Acute or chronic ingest...
Source: SafetyLit - March 11, 2017 Category: Global & Universal Tags: Home and Consumer Product Safety Source Type: news

Fatal Folic Acid Toxicity in Humans.
Abstract Folic acid is B-9 vitamin. Folic acid is prescribed commonly for pregnant women to prevent neural tube defects in the fetus, patients under chemotherapy, pernicious anemia and to reduce the risk of stroke and cardiovascular disease. Acute or chronic ingestion of a large dose of folic acid generally manifests as neurological complications, which are reversible. In this present case, a 23-year-old pregnant woman committed suicide by consuming folic acid tablets and succumbed to death within 36 h. Postmortem toxicological analysis detected folic acid in viscera. Death following acute consumption of folic aci...
Source: Journal of Forensic Sciences - March 5, 2017 Category: Forensic Medicine Authors: Devnath GP, Kumaran S, Rajiv R, Shaha KK, Nagaraj A Tags: J Forensic Sci Source Type: research

Risk of subarachnoid haemorrhage in people admitted to hospital with selected immune-mediated diseases: record-linkage studies
Conclusions: Our findings strongly support the suggestion that patients with some immune-mediated diseases have an increased risk of SAH. Further studies of the mechanisms behind this association are warranted.
Source: BMC Neurology - November 14, 2013 Category: Neurology Authors: Sreeram RamagopalanJulia PakpoorOlena SeminogRaph GoldacreLee GrahamMichael Goldacre Source Type: research