Read more about these FDA concerns here
Today, it is unfortunately no longer possible to perform the Schillings tests
Typical injection spots are: The abdomen , a couple of inches away from the belly button The outer thigh The back of the upper arm These are easy for self-injections too but again, only once a professional has shown you how to do it correctly
A 50 mg vial mixed with 3.0 mL of bacteriostatic water gives about 16.7 mg/mL, and the example subcutaneous range is 2.5 to 5 mg per day
doi:10.3390/molecules191119066 Vukojevic J, Milavi M, Perovi D, et al
Abstract Background: Vitamin B12 is essential for neurological function, red blood cell formation, and DNA synthesis