research centers vitamin b12 injection therapy Methylcobalamin (Vitamin B12) Vitamin B12 Supplements and Injections
Description
It does not appear to cause serious AEs in test subjects and has been linked to only mild, temporary side effects such as headaches, fatigue, and localized swelling [1]

Neurobion injectable vial form: Each vial contains 100 mg of Vitamin B1, 100 mg of Vitamin B6, and 1000 mcg of Vitamin B12

1 2 3 4 5 6 7 8 9 10 11 Institute of Medicine (1998)

But, injections are often the most effective way to get enough B12
