can i do my own b12 injections How to self-inject intramuscular vitamin - Overview How to give yourself a

You need a prescription, even though B12 is very safe to inject and you cant overdose

However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing

Vitamin B12 is an essential component of a number of enzymes involved in normal metabolism

American Family Physician, 58, 443-450

(More information) Normal function of the digestive system required for food-bound vitamin B 12 absorption is commonly impaired in individuals over 60 years of age, placing them at risk for vitamin B 12 deficiency