Abstract
Vitamin B12 is a co-enzyme of two important reactions: 1) the formation of succinic acid from fatty acids and amino acids; 2) the formation of homocysteine and methionine, which are necessary for the synthesis of choline, phosphatidylcholine, as well as adrenaline, creatine and carnitine. In addition, during the second reaction, folic acid is retained in the cell and thus adequate nucleic acid synthesis is ensured
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