According to the National Institutes of Health, B12 deficiency can cause damage to the nervous system before a blood test indicates anything
For more information, see the FAQs on Prescription Drug Importation from the Kaiser Family Foundation (KFF): How much is the shipping
Self-Administration Techniques Many patients like to give themselves subcutaneous B12 shots
Chitwood, ANAPHYLACTIC SHOCK FOLLOWING INTRAVENOUS ADMINISTRATION OF VITAMIN B COMPLEX, JAMA J
It is also sometimes prescribed to help with certain types of anemia caused by poor absorption of vitamin B12. This particular formulation comes in 1 mL vials that contain 1000mcg of cyanocobalamin, which can be used for multiple doses
It is not intended for human or veterinary use, and must not be used for diagnostic, therapeutic, or clinical purposes