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Some of the roles that are attributed to vitamin B12 include: Forming red blood cells Playing a role in DNA/RNA synthesis Acting as a cofactor for methionine synthase (helping with methylation or the conversion of homocysteine to methionine, which protects cardiovascular health and more) Facilitating metabolic conversion of protein and fats Carrying out neurotransmitter functions and helping with production of hormones Helping convert amino acids and make creatine Producing myelin sheath (the coating of nerves) Helping with synthesis of hemoglobin Playing a role in fetal development during pregnancy How do you test my vitamin B12 levels to see if I need treatment

Decreasing the risk of birth defects in pregnant women

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Heres a table to help understand B12 dosages for different groups: Women over 50 might need more B12, up to 1000 mcg a day