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Medicine has learned hard lessons from past cure-alls that went awry
Hydroxocobalamin is another naturally occurring form commonly used in medical settings
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methylcobalamin Vitamin B 12 appears to have only two functions in eukaryotes: as a cofactor for the enzymes: Methionine synthase MethylmalonylCoA mutase Sources of vitamin B12 Vitamin B 12 is in the gastrointestinal tract of animals and is then absorbed by the host animal
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