bruise after b12 injection Is Your Site Reaction Normal or Severe? Why do I feel worse

No procedure-related complications were reported

The B12, whether methylcobalamin or cyanocobalamin, goes into the muscle and into your system without depending on a digestive step that may not be working well for you

Consult the Safety Data Sheet for full handling guidance

The mechanism is scientifically sound and consistently supported by animal data, but human efficacy and safety have not been established through clinical trials

Common places for self-injecting B12 include: The middle of your thigh The meaty area of your hip Upper arm area Buttocks Fleshy part of your abdomen Some prescriptions are for subcutaneous injections delivered just under your skin