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Biological properties of vitamin B12
M. Moravcová, T. Siatka, LK. Krčmová, K. Matoušová, P. Mladěnka, OEMONOM
Jazyk angličtina Země Anglie, Velká Británie
Typ dokumentu časopisecké články, přehledy
- MeSH
- dieta vegetariánská MeSH
- dieta MeSH
- fortifikované potraviny MeSH
- lidé MeSH
- nedostatek vitaminu B12 * diagnóza prevence a kontrola farmakoterapie etiologie MeSH
- vitamin B 12 * farmakokinetika chemie metabolismus terapeutické užití fyziologie škodlivé účinky aplikace a dávkování farmakologie MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
Vitamin B12, cobalamin, is indispensable for humans owing to its participation in two biochemical reactions: the conversion of l-methylmalonyl coenzyme A to succinyl coenzyme A, and the formation of methionine by methylation of homocysteine. Eukaryotes, encompassing plants, fungi, animals and humans, do not synthesise vitamin B12, in contrast to prokaryotes. Humans must consume it in their diet. The most important sources include meat, milk and dairy products, fish, shellfish and eggs. Due to this, vegetarians are at risk to develop a vitamin B12 deficiency and it is recommended that they consume fortified food. Vitamin B12 behaves differently to most vitamins of the B complex in several aspects, e.g. it is more stable, has a very specific mechanism of absorption and is stored in large amounts in the organism. This review summarises all its biological aspects (including its structure and natural sources as well as its stability in food, pharmacokinetics and physiological function) as well as causes, symptoms, diagnosis (with a summary of analytical methods for its measurement), prevention and treatment of its deficiency, and its pharmacological use and potential toxicity.
Citace poskytuje Crossref.org
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