B12 Injections: Who Should Get Them and How Long Do They Last? B12 Injections Norfolk, VA Guy Trengove Jones MD How long do patients typically receive vitamin B12 (cobalamin) injections before switching to oral supplementation? Vitamin B12 injections benefit those with deficiencies or absorption issues, offering: 1. Energy Boost: Converts food to energy, reducing fatigue. 2. Mood Improvement: Essential for serotonin, aiding depression and anxiety. 3. Brain Not all shots are the same here's a guide Injections are a fast, effective way to deliver medications, nutrients, and vaccines directly into the bodybut not all injections are the Giving yourself an injection Roswell Park Comprehensive Cancer Center Buffalo, NY