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Conditions associated with elevated B12 levels include: Liver disease : Hepatocellular damage releases stored B12 into circulation, with levels correlating with disease severity in conditions such as cirrhosis, hepatitis, and hepatocellular carcinoma Renal impairment : Reduced kidney function decreases B12 clearance, leading to accumulation Haematological malignancies : Myeloproliferative disorders, acute leukaemia, and polycythaemia vera can elevate B12 through increased production of B12-binding proteins (transcobalamins) Solid tumours : Certain cancers, particularly those affecting the liver or gastrointestinal tract, may elevate B12 levels A specific concern relates to cyanocobalamin in patients with Leber's hereditary optic neuropathy , a rare mitochondrial disorder
Its key to talk to your oncology team about B12 during cancer care
A maintenance dose typically provides 1000 mcg
This is particularly beneficial for individuals with poor absorption, dietary restrictions, or higher metabolic needs
There is no completed human efficacy trial, which is why all dosing here is research-use-only
This loop is the storage mechanism for B12 in normal mammals as the intrinsic factor from the stomach holds onto the B12 and saves it for the ilium to recover and send to the liver
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