what happens if you inject b12 into vein Vitamin Injection Sites: All Need to Know Vitamin B12 Monthly Injection: Typical

Most patients receive B12 shots once each week

Do not use a solution that will not clarify

the minimum concentration of a substance needed to reduce the activity of an enzyme by at least 50%)

However, pharmacokinetic studies have shown methylcobalamin stays longer in brain and liver tissues

Conditions include alcoholic liver disease, viral hepatitis, cirrhosis, and primary or metastatic liver cancer Renal dysfunction : Impaired kidney function reduces B12 elimination, causing accumulation even with normal intake Haematological conditions : Myeloproliferative neoplasms, chronic myeloid leukaemia, polycythaemia vera, and hypereosinophilic syndrome increase transcobalamin production, elevating total serum B12 Laboratory interference : Macro-B12 (immunoglobulin-bound B12) and assay interference can cause spuriously elevated results without true excess In clinical practice, unexplained hypercobalaminaemia should prompt investigation for underlying disease, particularly in patients without obvious supplementation history