b12 injection is iv or im Sandoz Vitamin Injectable Solution - 1000 mcg/10 mL Vitamin B12 Shot | The

However, we need more research in this area to figure out exactly how each substance contributes to the overall result

Research/educational use only

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

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