b12 injection is iv or im Sandoz Vitamin Injectable Solution - 1000 mcg/10 mL No.1 Best Super B12 IM

Oral administration of high-dose vitamin B 12 (1 to 2 mg daily) is considered as effective as intramuscular administration for correcting anemia and neurologic symptoms Despite many studies suggesting oral administration of vitamin B 12 to be easy, effective and less costly than intramuscular administration, debate surrounds the effectiveness of the oral route

[DOI] [PubMed] [Google Scholar] 169.Wang, G

If youre new to the issue, Vegan B12 Deficiency: Putting It into Perspective, and Safest Source of B12 are good places to start

I also get pain in my right temple ( I wondered if it were to do with the piturity gland ) but wouldn't say I get it as bad as your experiencing mine is more of a dull ache