after b12 injection INJECTIONS Why Do I Feel Worse

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

One such piece of research is a 2020 review published in the journal Nutrients (1)

30% is stored in muscle (ref2)

Doses depend on the specific formulation and individual nutrient needs

That can be convenient when the research plan uses equal amounts