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PMID: 16965771
Myeloproliferative neoplasms (such as polycythaemia vera or chronic myeloid leukaemia) and acute leukaemias can increase B12-binding proteins (transcobalamins), raising total serum B12
Excessive IGF-1 carries long-term risks including potential promotion of existing cancerous cells
Details and Options: The usual B12 injection is cyanocobalamin 1 mg (1,000 mcg) administered intramuscularly (IM)
While being broken down in your stomach and intestines, around 50% of the vitamin and mineral dosage listed on the label is lost in the digestive tract and is flushed out of your body
No evidence supports cycling versus continuous use, and no studies have determined optimal treatment duration
