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
Transport into the cells is by simple diffusion followed by rephosphorylation
While the risk of contracting typhoid within Singapore is very low thanks to the countrys standards of sanitation and hygiene, travellers visiting certain regions where typhoid is more common such as parts of South Asia, Africa, and South America may be at increased risk
Vitamin B12 injections are also commonly used to help relieve fatigue
In the clinical trials conducted, no serious long-term adverse effects were reported
Do not you make any major changes to your diet or start any exercise regime without proper medical supervision
