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Folate and Vitamin B12 Function

Publication Date Jan 1, 2013

Abstract

Folate and vitamin B 12 are dietary essential vitamins required for human health. Folate functions as a cofactor in the synthesis of nucleotides required for DNA synthesis and in amino acid metabolism including the synthesis of the methyl group of methionine, an amino acid used extensively in methylation reactions. Vitamin B 12 metabolism interacts with folate metabolism as it is also a cofactor in synthesis of methionine and the catabolism of other amino acids. The classic symptom of both folate and vitamin B 12 deficiency is an identical megoloblastic (large cell) anemia, which is a reflection of defective DNA synthesis. Vitamin B 12 deficiency can also cause subacute combined disease, a severe demyelination condition. The finding that periconceptional folate supplementation greatly reduced the incidence of birth defects such as spina bifida in humans has led to fortification of the food supply with folic acid in the United States and over 50 other countries.

Concepts

Spina Bifida In Humans Vitamin B12 Synthesis Of Methionine Folate Metabolism Spina Bifida Methylation Reactions Amino Acid Folic Acid Catabolism Of Amino Acids Large Cell

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