While B12 can be found in foods like meat, fish, and dairy, some people struggle to absorb enough through diet alone
chronic liver disease and hepatitis may present with elevated levels Renal impairment : Reduced clearance can contribute to accumulation, though this is rarely clinically significant Solid tumours : Certain malignancies, particularly hepatocellular carcinoma and metastatic disease, may elevate B12 levels [3] Evidence suggests that unexplained markedly elevated B12 levels without supplementation may sometimes be associated with underlying disease
This test helps determine whether a person has normal levels of B12, is deficient, or has excessive levels due to supplementation or underlying conditions
Asian Journal of Neuroscience 2013:16 Mekaj A, Mekaj Y (2017) the role of pharmacological agents in nerve regeneration after peripheral nerve repair
B12 Injections are considered safe, even in patients without a notable deficiency