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
Human relevance has not been confirmed
Importantly, these mutations also led to the loss of recognition by a wide panel of monoclonal antibodies undergoing testing in the clinic [70]
Supplements B12 can be injected into the muscle (usually the arm or buttock)
You might notice: Persistent tiredness that doesnt improve with rest General weakness or feeling run down Dizziness or lightheadedness Shortness of breath, even with light activity Tingling or numbness in your hands or feet Brain fog or difficulty concentrating Low mood or feeling flat If any of these sound familiar, a Vitamin B12 injection might be exactly what you need to feel like yourself again