Supplementation of vitamin 12 in amounts up to 1000 mcg can be consumed safely
Injection Session: Small injections are carefully administered into the central fat pockets

Your doctor will conduct a comprehensive clinical assessment including: Detailed medication and supplement history , including over-the-counter vitamins and injections Review of symptoms suggesting liver, kidney, or haematological disease Physical examination for hepatomegaly, splenomegaly, jaundice, or lymphadenopathy Additional blood tests , such as full blood count, liver function tests, renal function, and inflammatory markers Depending on initial findings, further investigations may include: Liver ultrasound or imaging if hepatic pathology is suspected Haematology referral for blood film examination, bone marrow biopsy, or specific tests for myeloproliferative disorders Measurement of holotranscobalamin or methylmalonic acid if functional B12 status needs clarification despite high total B12 Targeted investigations based on clinical findings and following NICE guidance for suspected serious conditions Treatment focuses on addressing the underlying cause rather than the elevated B12 itself

I've certainly have neo cytamen hydrox at the surgery Rotexmedica (bought from Germany) Gerot snd lannoch Accord Those I'm familiar with and inject
B12-related fatigue can feel like being tired all the time, despite getting enough rest and sleep